/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 04:03:24,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 04:03:24,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 04:03:24,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 04:03:24,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 04:03:24,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 04:03:24,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 04:03:24,977 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 04:03:25,013 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 04:03:25,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 04:03:25,014 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 04:03:25,014 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 04:03:25,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 04:03:25,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 04:03:25,017 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 04:03:25,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 04:03:25,017 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 04:03:25,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 04:03:25,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 04:03:25,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 04:03:25,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 04:03:25,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 04:03:25,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 04:03:25,019 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 04:03:25,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 04:03:25,019 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 04:03:25,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 04:03:25,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 04:03:25,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 04:03:25,019 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 04:03:25,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 04:03:25,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 04:03:25,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 04:03:25,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 04:03:25,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 04:03:25,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 04:03:25,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 04:03:25,020 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 04:03:25,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 04:03:25,020 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 04:03:25,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 04:03:25,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 04:03:25,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 04:03:25,313 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 04:03:25,314 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 04:03:25,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl [2021-06-05 04:03:25,315 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl' [2021-06-05 04:03:25,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 04:03:25,346 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 04:03:25,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 04:03:25,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 04:03:25,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 04:03:25,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/1) ... [2021-06-05 04:03:25,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/1) ... [2021-06-05 04:03:25,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 04:03:25,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 04:03:25,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 04:03:25,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 04:03:25,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/1) ... [2021-06-05 04:03:25,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/1) ... [2021-06-05 04:03:25,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/1) ... [2021-06-05 04:03:25,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/1) ... [2021-06-05 04:03:25,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/1) ... [2021-06-05 04:03:25,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/1) ... [2021-06-05 04:03:25,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/1) ... [2021-06-05 04:03:25,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 04:03:25,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 04:03:25,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 04:03:25,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 04:03:25,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (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 04:03:25,490 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 04:03:25,491 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 04:03:25,491 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 04:03:25,491 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 04:03:25,491 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 04:03:25,492 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 04:03:25,492 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 04:03:25,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 04:03:25,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 04:03:25,493 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 04:03:25,721 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 04:03:25,721 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 04:03:25,722 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 04:03:25,722 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 04:03:25,723 INFO L202 PluginConnector]: Adding new model unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:03:25 BoogieIcfgContainer [2021-06-05 04:03:25,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 04:03:25,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 04:03:25,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 04:03:25,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 04:03:25,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/2) ... [2021-06-05 04:03:25,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b695094 and model type unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:03:25, skipping insertion in model container [2021-06-05 04:03:25,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:03:25" (2/2) ... [2021-06-05 04:03:25,729 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.bpl [2021-06-05 04:03:25,734 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 04:03:25,734 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 04:03:25,734 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 04:03:25,735 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 04:03:25,759 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 04:03:25,794 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 04:03:25,825 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 04:03:25,825 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 04:03:25,825 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 04:03:25,826 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 04:03:25,826 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 04:03:25,826 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 04:03:25,826 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 04:03:25,826 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 04:03:25,832 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-06-05 04:03:25,855 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 04:03:25,857 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 04:03:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 04:03:25,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:25,862 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:25,863 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:25,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:25,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1034851945, now seen corresponding path program 1 times [2021-06-05 04:03:25,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:25,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862633121] [2021-06-05 04:03:25,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:26,008 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 04:03:26,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:26,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862633121] [2021-06-05 04:03:26,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862633121] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:03:26,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:03:26,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 04:03:26,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309831083] [2021-06-05 04:03:26,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:03:26,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:26,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:03:26,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:03:26,032 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 04:03:26,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:26,062 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-06-05 04:03:26,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:03:26,064 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 04:03:26,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:26,074 INFO L225 Difference]: With dead ends: 22 [2021-06-05 04:03:26,074 INFO L226 Difference]: Without dead ends: 19 [2021-06-05 04:03:26,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:03:26,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-06-05 04:03:26,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-06-05 04:03:26,101 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 04:03:26,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-06-05 04:03:26,103 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-06-05 04:03:26,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:26,103 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-06-05 04:03:26,104 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 04:03:26,104 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-06-05 04:03:26,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:03:26,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:26,105 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:26,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 04:03:26,106 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:26,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:26,109 INFO L82 PathProgramCache]: Analyzing trace with hash -619637623, now seen corresponding path program 1 times [2021-06-05 04:03:26,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:26,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375050716] [2021-06-05 04:03:26,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:26,184 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 04:03:26,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:26,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375050716] [2021-06-05 04:03:26,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375050716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:26,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491796859] [2021-06-05 04:03:26,185 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 04:03:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:26,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 04:03:26,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:26,323 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 04:03:26,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491796859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:26,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:26,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-05 04:03:26,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777641348] [2021-06-05 04:03:26,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:03:26,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:26,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:03:26,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:03:26,334 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 04:03:26,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:26,385 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-06-05 04:03:26,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:03:26,386 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 04:03:26,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:26,388 INFO L225 Difference]: With dead ends: 28 [2021-06-05 04:03:26,388 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 04:03:26,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:03:26,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 04:03:26,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-06-05 04:03:26,402 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 04:03:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-06-05 04:03:26,405 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-06-05 04:03:26,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:26,405 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-06-05 04:03:26,405 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 04:03:26,406 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-06-05 04:03:26,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:03:26,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:26,407 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:26,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 04:03:26,621 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:26,621 INFO L82 PathProgramCache]: Analyzing trace with hash 2038710898, now seen corresponding path program 1 times [2021-06-05 04:03:26,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:26,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719046185] [2021-06-05 04:03:26,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:26,645 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 04:03:26,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:26,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719046185] [2021-06-05 04:03:26,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719046185] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:03:26,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:03:26,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:03:26,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737008999] [2021-06-05 04:03:26,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:03:26,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:26,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:03:26,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:03:26,647 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 04:03:26,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:26,671 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-06-05 04:03:26,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:03:26,672 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 04:03:26,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:26,673 INFO L225 Difference]: With dead ends: 22 [2021-06-05 04:03:26,673 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 04:03:26,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:03:26,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 04:03:26,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 04:03:26,675 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 04:03:26,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-06-05 04:03:26,676 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-06-05 04:03:26,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:26,676 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-06-05 04:03:26,676 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 04:03:26,677 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-06-05 04:03:26,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:03:26,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:26,677 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:26,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 04:03:26,677 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:26,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:26,678 INFO L82 PathProgramCache]: Analyzing trace with hash 298365290, now seen corresponding path program 2 times [2021-06-05 04:03:26,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:26,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549374317] [2021-06-05 04:03:26,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:26,709 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 04:03:26,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:26,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549374317] [2021-06-05 04:03:26,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549374317] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:03:26,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:03:26,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:03:26,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451894165] [2021-06-05 04:03:26,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:03:26,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:26,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:03:26,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:03:26,714 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 04:03:26,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:26,740 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-06-05 04:03:26,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:03:26,741 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 04:03:26,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:26,742 INFO L225 Difference]: With dead ends: 20 [2021-06-05 04:03:26,743 INFO L226 Difference]: Without dead ends: 20 [2021-06-05 04:03:26,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:03:26,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-06-05 04:03:26,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-06-05 04:03:26,751 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 04:03:26,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-05 04:03:26,752 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-05 04:03:26,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:26,753 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-05 04:03:26,753 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 04:03:26,753 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-05 04:03:26,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:03:26,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:26,754 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:26,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 04:03:26,754 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:26,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:26,755 INFO L82 PathProgramCache]: Analyzing trace with hash -2005825454, now seen corresponding path program 1 times [2021-06-05 04:03:26,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:26,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131554598] [2021-06-05 04:03:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:26,854 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 04:03:26,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:26,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131554598] [2021-06-05 04:03:26,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131554598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:26,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276561307] [2021-06-05 04:03:26,855 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 04:03:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:26,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 04:03:26,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:26,919 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 04:03:26,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276561307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:26,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:26,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 04:03:26,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075115500] [2021-06-05 04:03:26,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:03:26,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:26,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:03:26,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:03:26,921 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 04:03:26,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:26,933 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-06-05 04:03:26,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:03:26,934 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 04:03:26,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:26,934 INFO L225 Difference]: With dead ends: 24 [2021-06-05 04:03:26,934 INFO L226 Difference]: Without dead ends: 24 [2021-06-05 04:03:26,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:03:26,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-06-05 04:03:26,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-06-05 04:03:26,937 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 04:03:26,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-06-05 04:03:26,938 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-06-05 04:03:26,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:26,938 INFO L482 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-06-05 04:03:26,938 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 04:03:26,938 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-06-05 04:03:26,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:03:26,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:26,939 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:27,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:27,145 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:27,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:27,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1462566514, now seen corresponding path program 2 times [2021-06-05 04:03:27,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:27,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438542803] [2021-06-05 04:03:27,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:27,190 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 04:03:27,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:27,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438542803] [2021-06-05 04:03:27,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438542803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:27,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183287445] [2021-06-05 04:03:27,191 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 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 04:03:27,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:27,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:27,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:03:27,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:27,321 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 04:03:27,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183287445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:27,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:27,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-05 04:03:27,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813164340] [2021-06-05 04:03:27,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:03:27,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:27,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:03:27,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:03:27,323 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:27,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:27,346 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-06-05 04:03:27,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:03:27,347 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 04:03:27,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:27,347 INFO L225 Difference]: With dead ends: 28 [2021-06-05 04:03:27,347 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 04:03:27,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:03:27,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 04:03:27,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-06-05 04:03:27,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-06-05 04:03:27,351 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-06-05 04:03:27,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:27,351 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-06-05 04:03:27,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:27,351 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-06-05 04:03:27,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:27,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:27,352 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:27,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:27,565 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:27,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:27,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1608535122, now seen corresponding path program 3 times [2021-06-05 04:03:27,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:27,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462440694] [2021-06-05 04:03:27,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:27,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:27,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462440694] [2021-06-05 04:03:27,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462440694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:27,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301537666] [2021-06-05 04:03:27,636 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 04:03:27,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:03:27,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:27,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:03:27,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:27,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:27,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:03:27,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:27,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:27,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:27,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 04:03:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:27,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301537666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:27,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:27,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 04:03:27,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129099738] [2021-06-05 04:03:27,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:27,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:27,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:27,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:27,855 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:03:27,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:27,909 INFO L93 Difference]: Finished difference Result 67 states and 119 transitions. [2021-06-05 04:03:27,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:03:27,910 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 13 [2021-06-05 04:03:27,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:27,911 INFO L225 Difference]: With dead ends: 67 [2021-06-05 04:03:27,911 INFO L226 Difference]: Without dead ends: 64 [2021-06-05 04:03:27,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:27,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-05 04:03:27,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 39. [2021-06-05 04:03:27,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 82 transitions. [2021-06-05 04:03:27,918 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 82 transitions. Word has length 13 [2021-06-05 04:03:27,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:27,919 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 82 transitions. [2021-06-05 04:03:27,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 04:03:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 82 transitions. [2021-06-05 04:03:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:27,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:27,920 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:28,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:28,143 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:28,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:28,144 INFO L82 PathProgramCache]: Analyzing trace with hash -942907630, now seen corresponding path program 4 times [2021-06-05 04:03:28,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:28,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021802663] [2021-06-05 04:03:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:28,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:28,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:28,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021802663] [2021-06-05 04:03:28,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021802663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:28,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561107930] [2021-06-05 04:03:28,189 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 04:03:28,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:28,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:28,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:03:28,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:28,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:28,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:03:28,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:28,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:28,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:28,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 04:03:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:28,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561107930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:28,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:28,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 04:03:28,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290164548] [2021-06-05 04:03:28,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:28,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:28,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:28,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:28,351 INFO L87 Difference]: Start difference. First operand 39 states and 82 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 04:03:28,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:28,393 INFO L93 Difference]: Finished difference Result 75 states and 144 transitions. [2021-06-05 04:03:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:03:28,394 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 13 [2021-06-05 04:03:28,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:28,395 INFO L225 Difference]: With dead ends: 75 [2021-06-05 04:03:28,395 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 04:03:28,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:28,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 04:03:28,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 45. [2021-06-05 04:03:28,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 103 transitions. [2021-06-05 04:03:28,401 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 103 transitions. Word has length 13 [2021-06-05 04:03:28,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:28,402 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 103 transitions. [2021-06-05 04:03:28,402 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 04:03:28,402 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 103 transitions. [2021-06-05 04:03:28,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:28,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:28,403 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:28,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 04:03:28,617 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:28,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:28,617 INFO L82 PathProgramCache]: Analyzing trace with hash -317115318, now seen corresponding path program 5 times [2021-06-05 04:03:28,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:28,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264583664] [2021-06-05 04:03:28,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:28,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:28,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264583664] [2021-06-05 04:03:28,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264583664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:28,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107752237] [2021-06-05 04:03:28,666 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 04:03:28,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:03:28,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:28,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:03:28,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:28,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:28,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:03:28,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:28,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:28,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:28,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 04:03:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:28,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107752237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:28,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:28,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 04:03:28,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116466482] [2021-06-05 04:03:28,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:28,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:28,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:28,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:28,848 INFO L87 Difference]: Start difference. First operand 45 states and 103 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 04:03:28,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:28,902 INFO L93 Difference]: Finished difference Result 83 states and 169 transitions. [2021-06-05 04:03:28,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:03:28,903 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 13 [2021-06-05 04:03:28,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:28,904 INFO L225 Difference]: With dead ends: 83 [2021-06-05 04:03:28,905 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 04:03:28,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:28,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 04:03:28,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2021-06-05 04:03:28,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:28,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2021-06-05 04:03:28,921 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 13 [2021-06-05 04:03:28,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:28,922 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2021-06-05 04:03:28,922 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 04:03:28,922 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2021-06-05 04:03:28,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:28,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:28,923 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:29,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:29,123 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:29,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:29,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1902577170, now seen corresponding path program 6 times [2021-06-05 04:03:29,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:29,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117346281] [2021-06-05 04:03:29,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:29,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:29,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117346281] [2021-06-05 04:03:29,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117346281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:29,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222709452] [2021-06-05 04:03:29,156 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 04:03:29,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:03:29,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:29,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:03:29,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:29,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:29,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 04:03:29,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:29,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:29,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:29,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 04:03:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:29,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222709452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:29,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:29,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 04:03:29,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348493247] [2021-06-05 04:03:29,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:29,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:29,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:29,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:29,335 INFO L87 Difference]: Start difference. First operand 52 states and 127 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 04:03:29,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:29,398 INFO L93 Difference]: Finished difference Result 92 states and 197 transitions. [2021-06-05 04:03:29,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:03:29,398 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 13 [2021-06-05 04:03:29,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:29,399 INFO L225 Difference]: With dead ends: 92 [2021-06-05 04:03:29,399 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 04:03:29,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:29,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 04:03:29,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 61. [2021-06-05 04:03:29,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5833333333333335) internal successors, (155), 60 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:29,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 155 transitions. [2021-06-05 04:03:29,405 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 155 transitions. Word has length 13 [2021-06-05 04:03:29,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:29,405 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 155 transitions. [2021-06-05 04:03:29,406 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 04:03:29,406 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 155 transitions. [2021-06-05 04:03:29,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:03:29,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:29,407 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:29,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 04:03:29,621 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:29,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:29,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1838594674, now seen corresponding path program 7 times [2021-06-05 04:03:29,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:29,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346977054] [2021-06-05 04:03:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:29,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:29,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346977054] [2021-06-05 04:03:29,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346977054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:29,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012674432] [2021-06-05 04:03:29,700 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 04:03:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:29,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:29,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:29,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012674432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:29,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:29,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:03:29,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120811337] [2021-06-05 04:03:29,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:29,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:29,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:29,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:29,780 INFO L87 Difference]: Start difference. First operand 61 states and 155 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 04:03:29,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:29,864 INFO L93 Difference]: Finished difference Result 114 states and 226 transitions. [2021-06-05 04:03:29,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:03:29,864 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 04:03:29,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:29,865 INFO L225 Difference]: With dead ends: 114 [2021-06-05 04:03:29,865 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 04:03:29,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:03:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 04:03:29,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 62. [2021-06-05 04:03:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.6065573770491803) internal successors, (159), 61 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 159 transitions. [2021-06-05 04:03:29,871 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 159 transitions. Word has length 14 [2021-06-05 04:03:29,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:29,871 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 159 transitions. [2021-06-05 04:03:29,871 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 04:03:29,871 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 159 transitions. [2021-06-05 04:03:29,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:03:29,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:29,872 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:30,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 04:03:30,085 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:30,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:30,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1651947095, now seen corresponding path program 8 times [2021-06-05 04:03:30,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:30,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136214863] [2021-06-05 04:03:30,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:30,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:30,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136214863] [2021-06-05 04:03:30,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136214863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:30,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210503416] [2021-06-05 04:03:30,131 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 04:03:30,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:30,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:30,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:30,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:30,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210503416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:30,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:30,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:03:30,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120184848] [2021-06-05 04:03:30,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:30,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:30,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:30,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:30,208 INFO L87 Difference]: Start difference. First operand 62 states and 159 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 04:03:30,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:30,315 INFO L93 Difference]: Finished difference Result 121 states and 252 transitions. [2021-06-05 04:03:30,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:03:30,315 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 04:03:30,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:30,316 INFO L225 Difference]: With dead ends: 121 [2021-06-05 04:03:30,316 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 04:03:30,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:03:30,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 04:03:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-06-05 04:03:30,321 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 04:03:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2021-06-05 04:03:30,321 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 14 [2021-06-05 04:03:30,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:30,322 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2021-06-05 04:03:30,322 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 04:03:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2021-06-05 04:03:30,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:03:30,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:30,323 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:30,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:30,537 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:30,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:30,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1032606612, now seen corresponding path program 9 times [2021-06-05 04:03:30,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:30,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129584860] [2021-06-05 04:03:30,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:30,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:30,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129584860] [2021-06-05 04:03:30,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129584860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:30,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864120960] [2021-06-05 04:03:30,578 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 04:03:30,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:03:30,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:30,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:30,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:30,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864120960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:30,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:30,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 04:03:30,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288504524] [2021-06-05 04:03:30,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:03:30,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:30,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:03:30,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:30,691 INFO L87 Difference]: Start difference. First operand 75 states and 192 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 04:03:30,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:30,926 INFO L93 Difference]: Finished difference Result 137 states and 314 transitions. [2021-06-05 04:03:30,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:03:30,927 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 14 [2021-06-05 04:03:30,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:30,928 INFO L225 Difference]: With dead ends: 137 [2021-06-05 04:03:30,928 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 04:03:30,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 185.1ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:03:30,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 04:03:30,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2021-06-05 04:03:30,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.6116504854368934) internal successors, (269), 103 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:30,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 269 transitions. [2021-06-05 04:03:30,934 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 269 transitions. Word has length 14 [2021-06-05 04:03:30,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:30,934 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 269 transitions. [2021-06-05 04:03:30,934 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 04:03:30,934 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 269 transitions. [2021-06-05 04:03:30,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:03:30,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:30,935 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:31,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:31,157 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:31,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:31,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1949662965, now seen corresponding path program 10 times [2021-06-05 04:03:31,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:31,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303539616] [2021-06-05 04:03:31,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:31,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:31,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303539616] [2021-06-05 04:03:31,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303539616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:31,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781224797] [2021-06-05 04:03:31,196 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 04:03:31,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:31,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:31,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:31,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:31,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781224797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:31,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:31,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 04:03:31,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470602823] [2021-06-05 04:03:31,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:03:31,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:31,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:03:31,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:31,263 INFO L87 Difference]: Start difference. First operand 104 states and 269 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:03:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:31,307 INFO L93 Difference]: Finished difference Result 162 states and 349 transitions. [2021-06-05 04:03:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:03:31,308 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:03:31,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:31,308 INFO L225 Difference]: With dead ends: 162 [2021-06-05 04:03:31,308 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 04:03:31,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:31,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 04:03:31,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 105. [2021-06-05 04:03:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6153846153846154) internal successors, (272), 104 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 272 transitions. [2021-06-05 04:03:31,314 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 272 transitions. Word has length 14 [2021-06-05 04:03:31,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:31,314 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 272 transitions. [2021-06-05 04:03:31,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:03:31,314 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 272 transitions. [2021-06-05 04:03:31,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:03:31,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:31,315 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:31,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 04:03:31,529 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:31,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:31,529 INFO L82 PathProgramCache]: Analyzing trace with hash 857706217, now seen corresponding path program 11 times [2021-06-05 04:03:31,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:31,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127664025] [2021-06-05 04:03:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:31,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:31,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127664025] [2021-06-05 04:03:31,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127664025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:31,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408014783] [2021-06-05 04:03:31,571 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 04:03:31,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:03:31,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:31,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:31,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:31,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408014783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:31,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:31,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 04:03:31,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418637915] [2021-06-05 04:03:31,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:03:31,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:31,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:03:31,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:31,643 INFO L87 Difference]: Start difference. First operand 105 states and 272 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:03:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:31,747 INFO L93 Difference]: Finished difference Result 170 states and 369 transitions. [2021-06-05 04:03:31,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:03:31,748 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:03:31,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:31,750 INFO L225 Difference]: With dead ends: 170 [2021-06-05 04:03:31,750 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 04:03:31,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:31,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 04:03:31,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 112. [2021-06-05 04:03:31,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.6576576576576576) internal successors, (295), 111 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:31,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 295 transitions. [2021-06-05 04:03:31,764 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 295 transitions. Word has length 14 [2021-06-05 04:03:31,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:31,764 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 295 transitions. [2021-06-05 04:03:31,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:03:31,765 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 295 transitions. [2021-06-05 04:03:31,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:03:31,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:31,765 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:31,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 04:03:31,981 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:31,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:31,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1719512019, now seen corresponding path program 12 times [2021-06-05 04:03:31,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:31,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995972143] [2021-06-05 04:03:31,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:32,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:32,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995972143] [2021-06-05 04:03:32,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995972143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:32,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792542579] [2021-06-05 04:03:32,022 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 04:03:32,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:03:32,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:32,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:32,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:32,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792542579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:32,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:32,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 04:03:32,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354648624] [2021-06-05 04:03:32,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:03:32,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:32,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:03:32,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:32,091 INFO L87 Difference]: Start difference. First operand 112 states and 295 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:03:32,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:32,133 INFO L93 Difference]: Finished difference Result 174 states and 379 transitions. [2021-06-05 04:03:32,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:03:32,134 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:03:32,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:32,135 INFO L225 Difference]: With dead ends: 174 [2021-06-05 04:03:32,135 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 04:03:32,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:32,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 04:03:32,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 112. [2021-06-05 04:03:32,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.6576576576576576) internal successors, (295), 111 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 295 transitions. [2021-06-05 04:03:32,141 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 295 transitions. Word has length 14 [2021-06-05 04:03:32,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:32,141 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 295 transitions. [2021-06-05 04:03:32,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:03:32,141 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 295 transitions. [2021-06-05 04:03:32,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:03:32,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:32,142 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:32,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 04:03:32,353 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:32,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:32,353 INFO L82 PathProgramCache]: Analyzing trace with hash 846407943, now seen corresponding path program 13 times [2021-06-05 04:03:32,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:32,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947858409] [2021-06-05 04:03:32,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:32,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:32,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947858409] [2021-06-05 04:03:32,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947858409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:32,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420763309] [2021-06-05 04:03:32,389 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 04:03:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:32,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:32,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:32,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420763309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:32,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:32,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:03:32,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870786531] [2021-06-05 04:03:32,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:32,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:32,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:32,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:32,462 INFO L87 Difference]: Start difference. First operand 112 states and 295 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 04:03:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:32,528 INFO L93 Difference]: Finished difference Result 188 states and 405 transitions. [2021-06-05 04:03:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:03:32,528 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 04:03:32,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:32,529 INFO L225 Difference]: With dead ends: 188 [2021-06-05 04:03:32,529 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 04:03:32,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:32,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 04:03:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 114. [2021-06-05 04:03:32,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.663716814159292) internal successors, (301), 113 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 301 transitions. [2021-06-05 04:03:32,534 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 301 transitions. Word has length 14 [2021-06-05 04:03:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:32,534 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 301 transitions. [2021-06-05 04:03:32,534 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 04:03:32,534 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 301 transitions. [2021-06-05 04:03:32,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:03:32,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:32,535 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:32,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:32,749 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:32,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:32,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1217568591, now seen corresponding path program 14 times [2021-06-05 04:03:32,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:32,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118707322] [2021-06-05 04:03:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:32,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:32,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118707322] [2021-06-05 04:03:32,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118707322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:32,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754273324] [2021-06-05 04:03:32,787 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 04:03:32,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:32,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:32,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:32,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:32,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754273324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:32,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:32,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 04:03:32,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071691214] [2021-06-05 04:03:32,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:03:32,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:32,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:03:32,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:32,847 INFO L87 Difference]: Start difference. First operand 114 states and 301 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:03:32,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:32,923 INFO L93 Difference]: Finished difference Result 182 states and 405 transitions. [2021-06-05 04:03:32,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:03:32,923 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:03:32,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:32,924 INFO L225 Difference]: With dead ends: 182 [2021-06-05 04:03:32,924 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 04:03:32,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:32,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 04:03:32,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 124. [2021-06-05 04:03:32,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-06-05 04:03:32,928 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-06-05 04:03:32,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:32,929 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-06-05 04:03:32,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:03:32,929 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-06-05 04:03:32,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:03:32,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:32,929 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:33,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 04:03:33,141 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:33,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:33,141 INFO L82 PathProgramCache]: Analyzing trace with hash 500180469, now seen corresponding path program 15 times [2021-06-05 04:03:33,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:33,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634506623] [2021-06-05 04:03:33,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:33,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:33,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634506623] [2021-06-05 04:03:33,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634506623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:33,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027863057] [2021-06-05 04:03:33,176 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 04:03:33,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:03:33,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:33,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:33,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:33,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027863057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:33,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:33,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 04:03:33,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878928200] [2021-06-05 04:03:33,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:03:33,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:33,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:03:33,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:33,244 INFO L87 Difference]: Start difference. First operand 124 states and 333 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:03:33,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:33,281 INFO L93 Difference]: Finished difference Result 185 states and 412 transitions. [2021-06-05 04:03:33,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:03:33,282 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:03:33,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:33,283 INFO L225 Difference]: With dead ends: 185 [2021-06-05 04:03:33,283 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 04:03:33,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:33,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 04:03:33,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 124. [2021-06-05 04:03:33,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-06-05 04:03:33,287 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-06-05 04:03:33,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:33,287 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-06-05 04:03:33,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 04:03:33,287 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-06-05 04:03:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:03:33,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:33,288 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:33,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:33,505 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:33,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:33,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1228866865, now seen corresponding path program 16 times [2021-06-05 04:03:33,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:33,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338743739] [2021-06-05 04:03:33,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:33,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:33,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338743739] [2021-06-05 04:03:33,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338743739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:33,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565509706] [2021-06-05 04:03:33,550 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 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 04:03:33,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:33,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:33,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:33,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:33,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:33,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565509706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:33,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:33,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:03:33,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197454020] [2021-06-05 04:03:33,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:33,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:33,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:33,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:33,635 INFO L87 Difference]: Start difference. First operand 124 states and 333 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 04:03:33,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:33,703 INFO L93 Difference]: Finished difference Result 194 states and 429 transitions. [2021-06-05 04:03:33,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:03:33,703 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 04:03:33,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:33,705 INFO L225 Difference]: With dead ends: 194 [2021-06-05 04:03:33,705 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 04:03:33,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:33,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 04:03:33,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 124. [2021-06-05 04:03:33,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:33,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-06-05 04:03:33,710 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-06-05 04:03:33,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:33,710 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-06-05 04:03:33,710 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 04:03:33,710 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-06-05 04:03:33,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:03:33,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:33,712 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:33,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 04:03:33,937 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:33,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:33,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1005240629, now seen corresponding path program 17 times [2021-06-05 04:03:33,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:33,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316517400] [2021-06-05 04:03:33,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:33,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:33,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316517400] [2021-06-05 04:03:33,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316517400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:33,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190866557] [2021-06-05 04:03:33,977 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 04:03:34,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:03:34,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:34,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:34,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:34,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190866557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:34,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:34,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:03:34,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145046237] [2021-06-05 04:03:34,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:34,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:34,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:34,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:34,064 INFO L87 Difference]: Start difference. First operand 124 states and 333 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 04:03:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:34,155 INFO L93 Difference]: Finished difference Result 201 states and 462 transitions. [2021-06-05 04:03:34,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:03:34,156 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 04:03:34,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:34,157 INFO L225 Difference]: With dead ends: 201 [2021-06-05 04:03:34,157 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 04:03:34,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:03:34,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 04:03:34,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 132. [2021-06-05 04:03:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.7404580152671754) internal successors, (359), 131 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:34,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 359 transitions. [2021-06-05 04:03:34,161 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 359 transitions. Word has length 14 [2021-06-05 04:03:34,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:34,161 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 359 transitions. [2021-06-05 04:03:34,161 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 04:03:34,161 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 359 transitions. [2021-06-05 04:03:34,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:03:34,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:34,162 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:34,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 04:03:34,385 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:34,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:34,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1126578199, now seen corresponding path program 18 times [2021-06-05 04:03:34,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:34,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350365425] [2021-06-05 04:03:34,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:34,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:34,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350365425] [2021-06-05 04:03:34,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350365425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:34,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72401796] [2021-06-05 04:03:34,426 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 04:03:34,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:03:34,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:34,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:34,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:34,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72401796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:34,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:34,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 04:03:34,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310566722] [2021-06-05 04:03:34,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:34,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:34,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:34,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:34,496 INFO L87 Difference]: Start difference. First operand 132 states and 359 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 04:03:34,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:34,585 INFO L93 Difference]: Finished difference Result 208 states and 487 transitions. [2021-06-05 04:03:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:34,586 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 14 [2021-06-05 04:03:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:34,587 INFO L225 Difference]: With dead ends: 208 [2021-06-05 04:03:34,587 INFO L226 Difference]: Without dead ends: 206 [2021-06-05 04:03:34,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:03:34,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-05 04:03:34,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 151. [2021-06-05 04:03:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8) internal successors, (420), 150 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:34,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 420 transitions. [2021-06-05 04:03:34,594 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 420 transitions. Word has length 14 [2021-06-05 04:03:34,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:34,594 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 420 transitions. [2021-06-05 04:03:34,594 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 04:03:34,594 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 420 transitions. [2021-06-05 04:03:34,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:03:34,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:34,594 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:34,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:34,817 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:34,817 INFO L82 PathProgramCache]: Analyzing trace with hash 591170861, now seen corresponding path program 19 times [2021-06-05 04:03:34,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:34,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347203335] [2021-06-05 04:03:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:34,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:34,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347203335] [2021-06-05 04:03:34,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347203335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:34,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179424344] [2021-06-05 04:03:34,863 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 04:03:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:34,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:34,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:34,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179424344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:34,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:34,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 04:03:34,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274573798] [2021-06-05 04:03:34,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:34,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:34,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:34,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:34,969 INFO L87 Difference]: Start difference. First operand 151 states and 420 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 04:03:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:35,049 INFO L93 Difference]: Finished difference Result 199 states and 469 transitions. [2021-06-05 04:03:35,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:03:35,050 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 14 [2021-06-05 04:03:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:35,050 INFO L225 Difference]: With dead ends: 199 [2021-06-05 04:03:35,051 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 04:03:35,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:35,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 04:03:35,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 148. [2021-06-05 04:03:35,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.7687074829931975) internal successors, (407), 147 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:35,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 407 transitions. [2021-06-05 04:03:35,056 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 407 transitions. Word has length 14 [2021-06-05 04:03:35,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:35,056 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 407 transitions. [2021-06-05 04:03:35,056 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 04:03:35,056 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 407 transitions. [2021-06-05 04:03:35,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:03:35,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:35,057 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:35,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 04:03:35,273 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:35,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:35,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1137876473, now seen corresponding path program 20 times [2021-06-05 04:03:35,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:35,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721981909] [2021-06-05 04:03:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:35,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:35,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721981909] [2021-06-05 04:03:35,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721981909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:35,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524383649] [2021-06-05 04:03:35,339 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 04:03:35,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:35,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:35,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:35,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:35,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524383649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:35,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:35,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:03:35,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327256109] [2021-06-05 04:03:35,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:35,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:35,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:35,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:35,422 INFO L87 Difference]: Start difference. First operand 148 states and 407 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 04:03:35,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:35,531 INFO L93 Difference]: Finished difference Result 203 states and 476 transitions. [2021-06-05 04:03:35,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:35,531 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 14 [2021-06-05 04:03:35,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:35,532 INFO L225 Difference]: With dead ends: 203 [2021-06-05 04:03:35,532 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 04:03:35,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:03:35,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 04:03:35,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 144. [2021-06-05 04:03:35,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.7482517482517483) internal successors, (393), 143 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:35,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 393 transitions. [2021-06-05 04:03:35,537 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 393 transitions. Word has length 14 [2021-06-05 04:03:35,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:35,537 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 393 transitions. [2021-06-05 04:03:35,537 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 04:03:35,537 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 393 transitions. [2021-06-05 04:03:35,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:03:35,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:35,538 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:35,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 04:03:35,755 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:35,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:35,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1096231021, now seen corresponding path program 21 times [2021-06-05 04:03:35,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:35,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12616799] [2021-06-05 04:03:35,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:35,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:35,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12616799] [2021-06-05 04:03:35,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12616799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:35,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963719632] [2021-06-05 04:03:35,798 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 04:03:35,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:03:35,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:35,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:35,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:35,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963719632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:35,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:35,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:03:35,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199304897] [2021-06-05 04:03:35,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:35,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:35,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:35,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:35,875 INFO L87 Difference]: Start difference. First operand 144 states and 393 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 04:03:35,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:35,978 INFO L93 Difference]: Finished difference Result 179 states and 442 transitions. [2021-06-05 04:03:35,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:03:35,978 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 14 [2021-06-05 04:03:35,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:35,979 INFO L225 Difference]: With dead ends: 179 [2021-06-05 04:03:35,979 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 04:03:35,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:03:35,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 04:03:35,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2021-06-05 04:03:35,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.7357142857142858) internal successors, (383), 140 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 383 transitions. [2021-06-05 04:03:35,983 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 383 transitions. Word has length 14 [2021-06-05 04:03:35,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:35,984 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 383 transitions. [2021-06-05 04:03:35,984 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 04:03:35,984 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 383 transitions. [2021-06-05 04:03:35,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:03:35,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:35,984 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:36,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:36,201 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:36,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:36,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1634086599, now seen corresponding path program 22 times [2021-06-05 04:03:36,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:36,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582673380] [2021-06-05 04:03:36,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:36,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:36,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582673380] [2021-06-05 04:03:36,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582673380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:36,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005675162] [2021-06-05 04:03:36,280 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 04:03:36,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:36,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:36,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:36,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:36,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005675162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:36,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:36,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:03:36,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460909767] [2021-06-05 04:03:36,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:36,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:36,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:36,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:36,367 INFO L87 Difference]: Start difference. First operand 141 states and 383 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 04:03:36,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:36,519 INFO L93 Difference]: Finished difference Result 200 states and 499 transitions. [2021-06-05 04:03:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:36,519 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 14 [2021-06-05 04:03:36,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:36,520 INFO L225 Difference]: With dead ends: 200 [2021-06-05 04:03:36,520 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 04:03:36,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:03:36,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 04:03:36,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 142. [2021-06-05 04:03:36,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.74468085106383) internal successors, (387), 141 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 387 transitions. [2021-06-05 04:03:36,525 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 387 transitions. Word has length 14 [2021-06-05 04:03:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:36,525 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 387 transitions. [2021-06-05 04:03:36,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 04:03:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 387 transitions. [2021-06-05 04:03:36,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:03:36,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:36,526 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:36,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 04:03:36,749 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:36,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:36,750 INFO L82 PathProgramCache]: Analyzing trace with hash 674548242, now seen corresponding path program 23 times [2021-06-05 04:03:36,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:36,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911182714] [2021-06-05 04:03:36,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:36,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:36,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911182714] [2021-06-05 04:03:36,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911182714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:36,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272279236] [2021-06-05 04:03:36,788 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 04:03:36,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:03:36,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:36,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:36,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:36,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272279236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:36,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:36,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 04:03:36,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029394851] [2021-06-05 04:03:36,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:36,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:36,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:36,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:36,859 INFO L87 Difference]: Start difference. First operand 142 states and 387 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 04:03:36,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:36,913 INFO L93 Difference]: Finished difference Result 197 states and 465 transitions. [2021-06-05 04:03:36,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:03:36,913 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 15 [2021-06-05 04:03:36,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:36,915 INFO L225 Difference]: With dead ends: 197 [2021-06-05 04:03:36,915 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 04:03:36,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:36,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 04:03:36,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 146. [2021-06-05 04:03:36,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.7448275862068967) internal successors, (398), 145 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:36,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 398 transitions. [2021-06-05 04:03:36,919 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 398 transitions. Word has length 15 [2021-06-05 04:03:36,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:36,920 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 398 transitions. [2021-06-05 04:03:36,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 04:03:36,920 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 398 transitions. [2021-06-05 04:03:36,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:03:36,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:36,920 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:37,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:37,145 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:37,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:37,145 INFO L82 PathProgramCache]: Analyzing trace with hash -164351056, now seen corresponding path program 24 times [2021-06-05 04:03:37,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:37,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281937935] [2021-06-05 04:03:37,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:37,187 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 04:03:37,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:37,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281937935] [2021-06-05 04:03:37,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281937935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:37,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911221657] [2021-06-05 04:03:37,187 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 04:03:37,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:03:37,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:37,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:37,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:37,234 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 04:03:37,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911221657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:37,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:37,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-06-05 04:03:37,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578551252] [2021-06-05 04:03:37,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:37,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:37,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:37,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:37,235 INFO L87 Difference]: Start difference. First operand 146 states and 398 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 04:03:37,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:37,301 INFO L93 Difference]: Finished difference Result 194 states and 457 transitions. [2021-06-05 04:03:37,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:03:37,302 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 15 [2021-06-05 04:03:37,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:37,302 INFO L225 Difference]: With dead ends: 194 [2021-06-05 04:03:37,303 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 04:03:37,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:37,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 04:03:37,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 146. [2021-06-05 04:03:37,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.731034482758621) internal successors, (396), 145 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:37,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 396 transitions. [2021-06-05 04:03:37,307 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 396 transitions. Word has length 15 [2021-06-05 04:03:37,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:37,307 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 396 transitions. [2021-06-05 04:03:37,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 04:03:37,307 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 396 transitions. [2021-06-05 04:03:37,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:03:37,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:37,307 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:37,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 04:03:37,529 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:37,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:37,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1325053940, now seen corresponding path program 25 times [2021-06-05 04:03:37,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:37,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554179559] [2021-06-05 04:03:37,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:37,568 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 04:03:37,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:37,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554179559] [2021-06-05 04:03:37,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554179559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:37,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167722315] [2021-06-05 04:03:37,569 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 04:03:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:37,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:37,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:37,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167722315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:37,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:37,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 04:03:37,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106298826] [2021-06-05 04:03:37,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:37,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:37,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:37,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:37,626 INFO L87 Difference]: Start difference. First operand 146 states and 396 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 04:03:37,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:37,700 INFO L93 Difference]: Finished difference Result 179 states and 439 transitions. [2021-06-05 04:03:37,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:03:37,700 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 15 [2021-06-05 04:03:37,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:37,701 INFO L225 Difference]: With dead ends: 179 [2021-06-05 04:03:37,701 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 04:03:37,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:03:37,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 04:03:37,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 147. [2021-06-05 04:03:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.719178082191781) internal successors, (397), 146 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:37,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 397 transitions. [2021-06-05 04:03:37,705 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 397 transitions. Word has length 15 [2021-06-05 04:03:37,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:37,705 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 397 transitions. [2021-06-05 04:03:37,705 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 04:03:37,705 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 397 transitions. [2021-06-05 04:03:37,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:03:37,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:37,706 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:37,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 04:03:37,928 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:37,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:37,929 INFO L82 PathProgramCache]: Analyzing trace with hash 765538634, now seen corresponding path program 26 times [2021-06-05 04:03:37,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:37,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631033513] [2021-06-05 04:03:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:37,967 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 04:03:37,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:37,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631033513] [2021-06-05 04:03:37,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631033513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:37,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085264830] [2021-06-05 04:03:37,968 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 04:03:37,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:37,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:37,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:37,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:38,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085264830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:38,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:38,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 04:03:38,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870653230] [2021-06-05 04:03:38,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:38,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:38,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:38,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:38,031 INFO L87 Difference]: Start difference. First operand 147 states and 397 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 04:03:38,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:38,082 INFO L93 Difference]: Finished difference Result 220 states and 505 transitions. [2021-06-05 04:03:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:03:38,082 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 15 [2021-06-05 04:03:38,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:38,083 INFO L225 Difference]: With dead ends: 220 [2021-06-05 04:03:38,083 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 04:03:38,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:38,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 04:03:38,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 151. [2021-06-05 04:03:38,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7333333333333334) internal successors, (410), 150 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:38,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 410 transitions. [2021-06-05 04:03:38,088 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 410 transitions. Word has length 15 [2021-06-05 04:03:38,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:38,088 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 410 transitions. [2021-06-05 04:03:38,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 04:03:38,088 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 410 transitions. [2021-06-05 04:03:38,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:03:38,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:38,089 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:38,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 04:03:38,311 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:38,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:38,312 INFO L82 PathProgramCache]: Analyzing trace with hash -73360664, now seen corresponding path program 27 times [2021-06-05 04:03:38,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:38,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258021319] [2021-06-05 04:03:38,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:38,353 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 04:03:38,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:38,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258021319] [2021-06-05 04:03:38,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258021319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:38,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691690002] [2021-06-05 04:03:38,354 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 04:03:38,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:03:38,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:38,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:03:38,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:38,414 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 04:03:38,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691690002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:38,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:38,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:03:38,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948451175] [2021-06-05 04:03:38,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:38,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:38,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:38,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:38,416 INFO L87 Difference]: Start difference. First operand 151 states and 410 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 04:03:38,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:38,486 INFO L93 Difference]: Finished difference Result 207 states and 482 transitions. [2021-06-05 04:03:38,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:03:38,486 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 15 [2021-06-05 04:03:38,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:38,487 INFO L225 Difference]: With dead ends: 207 [2021-06-05 04:03:38,487 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 04:03:38,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:38,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 04:03:38,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 151. [2021-06-05 04:03:38,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.72) internal successors, (408), 150 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:38,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 408 transitions. [2021-06-05 04:03:38,491 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 408 transitions. Word has length 15 [2021-06-05 04:03:38,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:38,491 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 408 transitions. [2021-06-05 04:03:38,491 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 04:03:38,492 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 408 transitions. [2021-06-05 04:03:38,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:03:38,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:38,492 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:38,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:38,713 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:38,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:38,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1416044332, now seen corresponding path program 28 times [2021-06-05 04:03:38,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:38,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121222475] [2021-06-05 04:03:38,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:38,763 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 04:03:38,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:38,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121222475] [2021-06-05 04:03:38,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121222475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:38,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768727694] [2021-06-05 04:03:38,764 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 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 04:03:38,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:38,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:38,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:38,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:38,824 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 04:03:38,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768727694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:38,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:38,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 04:03:38,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967007198] [2021-06-05 04:03:38,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:38,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:38,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:38,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:38,826 INFO L87 Difference]: Start difference. First operand 151 states and 408 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 04:03:38,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:38,907 INFO L93 Difference]: Finished difference Result 212 states and 487 transitions. [2021-06-05 04:03:38,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:03:38,908 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 15 [2021-06-05 04:03:38,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:38,909 INFO L225 Difference]: With dead ends: 212 [2021-06-05 04:03:38,909 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 04:03:38,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:03:38,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 04:03:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 151. [2021-06-05 04:03:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7133333333333334) internal successors, (407), 150 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:38,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 407 transitions. [2021-06-05 04:03:38,913 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 407 transitions. Word has length 15 [2021-06-05 04:03:38,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:38,913 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 407 transitions. [2021-06-05 04:03:38,913 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 04:03:38,913 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 407 transitions. [2021-06-05 04:03:38,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:03:38,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:38,914 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:39,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 04:03:39,137 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:39,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:39,137 INFO L82 PathProgramCache]: Analyzing trace with hash 342958952, now seen corresponding path program 29 times [2021-06-05 04:03:39,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:39,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895221432] [2021-06-05 04:03:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:39,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:39,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895221432] [2021-06-05 04:03:39,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895221432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:39,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777776141] [2021-06-05 04:03:39,182 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 04:03:39,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:03:39,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:39,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:39,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:39,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777776141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:39,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:39,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 04:03:39,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136498662] [2021-06-05 04:03:39,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:39,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:39,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:39,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:39,263 INFO L87 Difference]: Start difference. First operand 151 states and 407 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 04:03:39,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:39,339 INFO L93 Difference]: Finished difference Result 182 states and 465 transitions. [2021-06-05 04:03:39,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:03:39,339 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 15 [2021-06-05 04:03:39,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:39,340 INFO L225 Difference]: With dead ends: 182 [2021-06-05 04:03:39,340 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 04:03:39,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:03:39,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 04:03:39,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 151. [2021-06-05 04:03:39,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7066666666666666) internal successors, (406), 150 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:39,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 406 transitions. [2021-06-05 04:03:39,344 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 406 transitions. Word has length 15 [2021-06-05 04:03:39,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:39,344 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 406 transitions. [2021-06-05 04:03:39,344 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 04:03:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 406 transitions. [2021-06-05 04:03:39,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:03:39,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:39,344 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:39,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:39,553 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:39,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:39,553 INFO L82 PathProgramCache]: Analyzing trace with hash -708726510, now seen corresponding path program 30 times [2021-06-05 04:03:39,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:39,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830028642] [2021-06-05 04:03:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:39,598 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 04:03:39,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:39,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830028642] [2021-06-05 04:03:39,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830028642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:39,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526107943] [2021-06-05 04:03:39,599 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 04:03:39,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:03:39,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:39,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:39,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:39,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526107943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:39,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:39,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-06-05 04:03:39,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127771536] [2021-06-05 04:03:39,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:39,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:39,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:39,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:39,685 INFO L87 Difference]: Start difference. First operand 151 states and 406 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 04:03:39,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:39,754 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2021-06-05 04:03:39,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:03:39,754 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 04:03:39,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:39,755 INFO L225 Difference]: With dead ends: 262 [2021-06-05 04:03:39,755 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 04:03:39,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:39,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 04:03:39,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 175. [2021-06-05 04:03:39,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.839080459770115) internal successors, (494), 174 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:39,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 494 transitions. [2021-06-05 04:03:39,760 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 494 transitions. Word has length 15 [2021-06-05 04:03:39,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:39,761 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 494 transitions. [2021-06-05 04:03:39,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 04:03:39,761 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 494 transitions. [2021-06-05 04:03:39,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:03:39,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:39,761 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:39,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 04:03:39,984 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:39,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:39,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1547625808, now seen corresponding path program 31 times [2021-06-05 04:03:39,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:39,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739950695] [2021-06-05 04:03:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:39,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:40,023 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 04:03:40,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:40,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739950695] [2021-06-05 04:03:40,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739950695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:40,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073039017] [2021-06-05 04:03:40,024 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 04:03:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:40,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:40,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:40,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073039017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:40,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:40,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2021-06-05 04:03:40,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526987378] [2021-06-05 04:03:40,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:40,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:40,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:40,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:40,077 INFO L87 Difference]: Start difference. First operand 175 states and 494 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 04:03:40,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:40,154 INFO L93 Difference]: Finished difference Result 242 states and 591 transitions. [2021-06-05 04:03:40,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:03:40,154 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 15 [2021-06-05 04:03:40,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:40,155 INFO L225 Difference]: With dead ends: 242 [2021-06-05 04:03:40,155 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 04:03:40,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:03:40,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 04:03:40,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 175. [2021-06-05 04:03:40,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8275862068965516) internal successors, (492), 174 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:40,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 492 transitions. [2021-06-05 04:03:40,160 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 492 transitions. Word has length 15 [2021-06-05 04:03:40,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:40,160 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 492 transitions. [2021-06-05 04:03:40,160 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 04:03:40,160 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 492 transitions. [2021-06-05 04:03:40,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:03:40,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:40,161 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:40,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 04:03:40,361 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:40,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:40,361 INFO L82 PathProgramCache]: Analyzing trace with hash -58220812, now seen corresponding path program 32 times [2021-06-05 04:03:40,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:40,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252897934] [2021-06-05 04:03:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:40,397 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 04:03:40,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:40,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252897934] [2021-06-05 04:03:40,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252897934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:40,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469519372] [2021-06-05 04:03:40,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:03:40,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:40,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:40,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:40,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:40,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469519372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:40,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:40,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 04:03:40,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130233209] [2021-06-05 04:03:40,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:40,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:40,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:40,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:40,471 INFO L87 Difference]: Start difference. First operand 175 states and 492 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 04:03:40,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:40,559 INFO L93 Difference]: Finished difference Result 247 states and 596 transitions. [2021-06-05 04:03:40,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:40,560 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 15 [2021-06-05 04:03:40,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:40,561 INFO L225 Difference]: With dead ends: 247 [2021-06-05 04:03:40,561 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 04:03:40,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:03:40,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 04:03:40,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 179. [2021-06-05 04:03:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.842696629213483) internal successors, (506), 178 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:40,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 506 transitions. [2021-06-05 04:03:40,565 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 506 transitions. Word has length 15 [2021-06-05 04:03:40,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:40,566 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 506 transitions. [2021-06-05 04:03:40,566 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 04:03:40,566 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 506 transitions. [2021-06-05 04:03:40,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:03:40,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:40,566 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:40,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 04:03:40,789 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:40,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:40,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1131306192, now seen corresponding path program 33 times [2021-06-05 04:03:40,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:40,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065009751] [2021-06-05 04:03:40,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:40,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:40,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065009751] [2021-06-05 04:03:40,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065009751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:40,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343862293] [2021-06-05 04:03:40,836 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 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 04:03:40,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:03:40,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:40,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:40,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:40,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:40,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343862293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:40,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:40,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 04:03:40,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605208934] [2021-06-05 04:03:40,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:40,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:40,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:40,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:40,922 INFO L87 Difference]: Start difference. First operand 179 states and 506 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 04:03:41,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:41,005 INFO L93 Difference]: Finished difference Result 219 states and 577 transitions. [2021-06-05 04:03:41,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:03:41,005 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 15 [2021-06-05 04:03:41,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:41,006 INFO L225 Difference]: With dead ends: 219 [2021-06-05 04:03:41,006 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 04:03:41,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:03:41,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 04:03:41,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 179. [2021-06-05 04:03:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.837078651685393) internal successors, (505), 178 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:41,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 505 transitions. [2021-06-05 04:03:41,010 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 505 transitions. Word has length 15 [2021-06-05 04:03:41,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:41,010 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 505 transitions. [2021-06-05 04:03:41,010 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 04:03:41,010 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 505 transitions. [2021-06-05 04:03:41,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:03:41,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:41,011 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:41,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 04:03:41,234 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:41,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:41,234 INFO L82 PathProgramCache]: Analyzing trace with hash -37214604, now seen corresponding path program 34 times [2021-06-05 04:03:41,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:41,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81383800] [2021-06-05 04:03:41,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:41,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:41,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81383800] [2021-06-05 04:03:41,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81383800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:41,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303585046] [2021-06-05 04:03:41,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:03:41,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:41,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:41,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:03:41,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:41,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303585046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:41,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:41,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 04:03:41,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177542834] [2021-06-05 04:03:41,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:03:41,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:41,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:03:41,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:41,365 INFO L87 Difference]: Start difference. First operand 179 states and 505 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 04:03:41,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:41,442 INFO L93 Difference]: Finished difference Result 212 states and 567 transitions. [2021-06-05 04:03:41,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:03:41,443 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 15 [2021-06-05 04:03:41,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:41,444 INFO L225 Difference]: With dead ends: 212 [2021-06-05 04:03:41,444 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 04:03:41,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:41,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 04:03:41,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 179. [2021-06-05 04:03:41,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.831460674157303) internal successors, (504), 178 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:41,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 504 transitions. [2021-06-05 04:03:41,448 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 504 transitions. Word has length 15 [2021-06-05 04:03:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:41,448 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 504 transitions. [2021-06-05 04:03:41,448 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 04:03:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 504 transitions. [2021-06-05 04:03:41,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:41,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:41,449 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:41,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 04:03:41,657 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:41,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:41,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1066138199, now seen corresponding path program 35 times [2021-06-05 04:03:41,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:41,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856106189] [2021-06-05 04:03:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:03:41,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:41,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856106189] [2021-06-05 04:03:41,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856106189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:41,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293622583] [2021-06-05 04:03:41,737 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 04:03:41,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:03:41,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:41,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:03:41,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:03:41,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293622583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:41,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:41,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 04:03:41,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892531073] [2021-06-05 04:03:41,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:03:41,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:41,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:03:41,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:41,831 INFO L87 Difference]: Start difference. First operand 179 states and 504 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:03:41,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:41,955 INFO L93 Difference]: Finished difference Result 452 states and 1210 transitions. [2021-06-05 04:03:41,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:03:41,956 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:03:41,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:41,958 INFO L225 Difference]: With dead ends: 452 [2021-06-05 04:03:41,958 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 04:03:41,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:41,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 04:03:41,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 236. [2021-06-05 04:03:41,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.748936170212766) internal successors, (646), 235 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:41,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 646 transitions. [2021-06-05 04:03:41,964 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 646 transitions. Word has length 16 [2021-06-05 04:03:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:41,964 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 646 transitions. [2021-06-05 04:03:41,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:03:41,964 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 646 transitions. [2021-06-05 04:03:41,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:41,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:41,965 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:42,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 04:03:42,181 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:42,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:42,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2129828983, now seen corresponding path program 36 times [2021-06-05 04:03:42,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:42,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685383959] [2021-06-05 04:03:42,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:42,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:42,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685383959] [2021-06-05 04:03:42,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685383959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:42,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627414853] [2021-06-05 04:03:42,232 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 04:03:42,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:03:42,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:42,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:03:42,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:42,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:42,437 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 04:03:42,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:42,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:42,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:42,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:03:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:42,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627414853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:42,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:42,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 04:03:42,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628633249] [2021-06-05 04:03:42,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:03:42,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:42,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:03:42,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:42,705 INFO L87 Difference]: Start difference. First operand 236 states and 646 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 04:03:42,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:42,810 INFO L93 Difference]: Finished difference Result 318 states and 823 transitions. [2021-06-05 04:03:42,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:42,810 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 17 [2021-06-05 04:03:42,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:42,811 INFO L225 Difference]: With dead ends: 318 [2021-06-05 04:03:42,812 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 04:03:42,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:42,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 04:03:42,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 284. [2021-06-05 04:03:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.7420494699646643) internal successors, (776), 283 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 776 transitions. [2021-06-05 04:03:42,817 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 776 transitions. Word has length 17 [2021-06-05 04:03:42,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:42,817 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 776 transitions. [2021-06-05 04:03:42,817 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 04:03:42,817 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 776 transitions. [2021-06-05 04:03:42,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:42,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:42,818 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:43,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-05 04:03:43,041 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:43,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:43,041 INFO L82 PathProgramCache]: Analyzing trace with hash 368526055, now seen corresponding path program 37 times [2021-06-05 04:03:43,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:43,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099396259] [2021-06-05 04:03:43,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:43,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:43,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099396259] [2021-06-05 04:03:43,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099396259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:43,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612406183] [2021-06-05 04:03:43,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:03:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:43,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:03:43,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:43,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:43,325 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 04:03:43,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:43,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:43,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:43,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:03:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:43,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612406183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:43,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:43,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 04:03:43,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291581816] [2021-06-05 04:03:43,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:03:43,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:43,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:03:43,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:43,478 INFO L87 Difference]: Start difference. First operand 284 states and 776 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 04:03:43,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:43,606 INFO L93 Difference]: Finished difference Result 363 states and 957 transitions. [2021-06-05 04:03:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:43,607 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 17 [2021-06-05 04:03:43,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:43,608 INFO L225 Difference]: With dead ends: 363 [2021-06-05 04:03:43,608 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 04:03:43,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:43,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 04:03:43,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 326. [2021-06-05 04:03:43,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.766153846153846) internal successors, (899), 325 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:43,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 899 transitions. [2021-06-05 04:03:43,615 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 899 transitions. Word has length 17 [2021-06-05 04:03:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:43,615 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 899 transitions. [2021-06-05 04:03:43,615 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 04:03:43,615 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 899 transitions. [2021-06-05 04:03:43,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:43,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:43,616 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:43,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:43,834 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:43,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:43,835 INFO L82 PathProgramCache]: Analyzing trace with hash 527358741, now seen corresponding path program 38 times [2021-06-05 04:03:43,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:43,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271468390] [2021-06-05 04:03:43,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:43,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:43,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271468390] [2021-06-05 04:03:43,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271468390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:43,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840662082] [2021-06-05 04:03:43,889 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 04:03:43,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:43,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:43,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:03:43,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:44,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:44,113 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 04:03:44,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:44,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:44,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:44,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:03:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:44,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840662082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:44,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:44,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 04:03:44,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469771434] [2021-06-05 04:03:44,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:03:44,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:44,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:03:44,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:44,428 INFO L87 Difference]: Start difference. First operand 326 states and 899 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 04:03:44,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:44,566 INFO L93 Difference]: Finished difference Result 412 states and 1100 transitions. [2021-06-05 04:03:44,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:44,566 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 17 [2021-06-05 04:03:44,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:44,567 INFO L225 Difference]: With dead ends: 412 [2021-06-05 04:03:44,567 INFO L226 Difference]: Without dead ends: 408 [2021-06-05 04:03:44,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:44,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-06-05 04:03:44,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 370. [2021-06-05 04:03:44,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.8048780487804876) internal successors, (1035), 369 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 04:03:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1035 transitions. [2021-06-05 04:03:44,573 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1035 transitions. Word has length 17 [2021-06-05 04:03:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:44,573 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1035 transitions. [2021-06-05 04:03:44,573 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 04:03:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1035 transitions. [2021-06-05 04:03:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:44,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:44,574 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:44,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 04:03:44,789 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:44,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:44,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1156204711, now seen corresponding path program 39 times [2021-06-05 04:03:44,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:44,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203669604] [2021-06-05 04:03:44,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:44,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:44,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203669604] [2021-06-05 04:03:44,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203669604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:44,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152408802] [2021-06-05 04:03:44,831 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 04:03:44,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:03:44,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:44,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:03:44,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:45,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:45,044 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 04:03:45,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:45,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:45,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:45,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:03:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:45,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152408802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:45,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:45,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 04:03:45,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498885313] [2021-06-05 04:03:45,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:03:45,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:45,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:03:45,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:45,283 INFO L87 Difference]: Start difference. First operand 370 states and 1035 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 04:03:45,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:45,416 INFO L93 Difference]: Finished difference Result 474 states and 1277 transitions. [2021-06-05 04:03:45,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:45,417 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:45,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:45,419 INFO L225 Difference]: With dead ends: 474 [2021-06-05 04:03:45,419 INFO L226 Difference]: Without dead ends: 470 [2021-06-05 04:03:45,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:45,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-05 04:03:45,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 421. [2021-06-05 04:03:45,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.85) internal successors, (1197), 420 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 04:03:45,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1197 transitions. [2021-06-05 04:03:45,429 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1197 transitions. Word has length 17 [2021-06-05 04:03:45,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:45,430 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1197 transitions. [2021-06-05 04:03:45,430 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 04:03:45,431 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1197 transitions. [2021-06-05 04:03:45,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:45,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:45,432 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:45,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:45,655 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:45,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:45,655 INFO L82 PathProgramCache]: Analyzing trace with hash -824406699, now seen corresponding path program 40 times [2021-06-05 04:03:45,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:45,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617590541] [2021-06-05 04:03:45,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:45,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:45,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617590541] [2021-06-05 04:03:45,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617590541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:45,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007149375] [2021-06-05 04:03:45,716 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 04:03:45,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:45,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:45,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:03:45,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:45,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:45,926 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 04:03:46,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:46,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:46,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:46,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:03:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:46,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007149375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:46,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:46,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 04:03:46,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715731899] [2021-06-05 04:03:46,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:03:46,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:46,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:03:46,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:46,120 INFO L87 Difference]: Start difference. First operand 421 states and 1197 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 04:03:46,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:46,280 INFO L93 Difference]: Finished difference Result 501 states and 1382 transitions. [2021-06-05 04:03:46,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:46,280 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 17 [2021-06-05 04:03:46,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:46,282 INFO L225 Difference]: With dead ends: 501 [2021-06-05 04:03:46,282 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 04:03:46,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:46,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 04:03:46,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 462. [2021-06-05 04:03:46,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.8720173535791758) internal successors, (1324), 461 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:46,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1324 transitions. [2021-06-05 04:03:46,291 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1324 transitions. Word has length 17 [2021-06-05 04:03:46,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:46,291 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1324 transitions. [2021-06-05 04:03:46,291 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 04:03:46,291 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1324 transitions. [2021-06-05 04:03:46,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:46,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:46,292 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:46,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 04:03:46,505 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:46,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2093818265, now seen corresponding path program 41 times [2021-06-05 04:03:46,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:46,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730232425] [2021-06-05 04:03:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:46,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:46,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730232425] [2021-06-05 04:03:46,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730232425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:46,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660132038] [2021-06-05 04:03:46,545 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 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 04:03:46,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:03:46,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:46,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:03:46,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:46,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:46,752 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 04:03:46,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:46,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:46,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:46,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:03:46,979 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:46,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660132038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:46,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:46,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 04:03:46,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571739469] [2021-06-05 04:03:46,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:03:46,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:46,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:03:46,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:46,980 INFO L87 Difference]: Start difference. First operand 462 states and 1324 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 04:03:47,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:47,091 INFO L93 Difference]: Finished difference Result 537 states and 1487 transitions. [2021-06-05 04:03:47,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:47,092 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 17 [2021-06-05 04:03:47,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:47,094 INFO L225 Difference]: With dead ends: 537 [2021-06-05 04:03:47,094 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 04:03:47,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:47,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 04:03:47,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 497. [2021-06-05 04:03:47,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.8891129032258065) internal successors, (1433), 496 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1433 transitions. [2021-06-05 04:03:47,103 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1433 transitions. Word has length 17 [2021-06-05 04:03:47,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:47,103 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1433 transitions. [2021-06-05 04:03:47,103 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 04:03:47,103 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1433 transitions. [2021-06-05 04:03:47,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:47,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:47,104 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:47,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:47,319 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:47,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:47,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1504096149, now seen corresponding path program 42 times [2021-06-05 04:03:47,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:47,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24598068] [2021-06-05 04:03:47,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:47,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:47,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24598068] [2021-06-05 04:03:47,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24598068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:47,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697762015] [2021-06-05 04:03:47,367 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 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 04:03:47,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:03:47,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:47,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:03:47,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:47,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:47,596 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 04:03:47,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:47,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:47,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:47,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:03:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:47,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697762015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:47,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:47,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 04:03:47,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56680932] [2021-06-05 04:03:47,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:03:47,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:47,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:03:47,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:47,764 INFO L87 Difference]: Start difference. First operand 497 states and 1433 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 04:03:47,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:47,889 INFO L93 Difference]: Finished difference Result 574 states and 1592 transitions. [2021-06-05 04:03:47,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:47,890 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 17 [2021-06-05 04:03:47,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:47,892 INFO L225 Difference]: With dead ends: 574 [2021-06-05 04:03:47,892 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 04:03:47,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:47,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 04:03:47,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 529. [2021-06-05 04:03:47,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 2.9015151515151514) internal successors, (1532), 528 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:47,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1532 transitions. [2021-06-05 04:03:47,902 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1532 transitions. Word has length 17 [2021-06-05 04:03:47,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:47,902 INFO L482 AbstractCegarLoop]: Abstraction has 529 states and 1532 transitions. [2021-06-05 04:03:47,902 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 04:03:47,902 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1532 transitions. [2021-06-05 04:03:47,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:47,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:47,903 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:48,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:48,120 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:48,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:48,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1577117358, now seen corresponding path program 43 times [2021-06-05 04:03:48,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:48,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759222529] [2021-06-05 04:03:48,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:48,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:48,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759222529] [2021-06-05 04:03:48,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759222529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:48,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914936897] [2021-06-05 04:03:48,183 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 04:03:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:48,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:48,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:48,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914936897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:48,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:48,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:03:48,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387581043] [2021-06-05 04:03:48,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:03:48,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:48,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:03:48,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:48,259 INFO L87 Difference]: Start difference. First operand 529 states and 1532 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:03:48,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:48,496 INFO L93 Difference]: Finished difference Result 696 states and 1799 transitions. [2021-06-05 04:03:48,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:03:48,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-06-05 04:03:48,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:48,498 INFO L225 Difference]: With dead ends: 696 [2021-06-05 04:03:48,498 INFO L226 Difference]: Without dead ends: 689 [2021-06-05 04:03:48,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 197.3ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:03:48,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-06-05 04:03:48,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 549. [2021-06-05 04:03:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.906934306569343) internal successors, (1593), 548 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1593 transitions. [2021-06-05 04:03:48,513 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1593 transitions. Word has length 18 [2021-06-05 04:03:48,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:48,513 INFO L482 AbstractCegarLoop]: Abstraction has 549 states and 1593 transitions. [2021-06-05 04:03:48,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:03:48,513 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1593 transitions. [2021-06-05 04:03:48,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:48,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:48,514 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:48,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-05 04:03:48,729 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:48,729 INFO L82 PathProgramCache]: Analyzing trace with hash 121393866, now seen corresponding path program 44 times [2021-06-05 04:03:48,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:48,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707658632] [2021-06-05 04:03:48,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:48,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:48,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707658632] [2021-06-05 04:03:48,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707658632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:48,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027202683] [2021-06-05 04:03:48,782 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 04:03:48,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:48,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:48,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:48,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:48,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027202683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:48,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:48,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:03:48,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638904671] [2021-06-05 04:03:48,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:48,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:48,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:48,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:48,863 INFO L87 Difference]: Start difference. First operand 549 states and 1593 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 04:03:48,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:48,914 INFO L93 Difference]: Finished difference Result 706 states and 1828 transitions. [2021-06-05 04:03:48,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:03:48,915 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 18 [2021-06-05 04:03:48,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:48,918 INFO L225 Difference]: With dead ends: 706 [2021-06-05 04:03:48,918 INFO L226 Difference]: Without dead ends: 706 [2021-06-05 04:03:48,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:48,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-05 04:03:48,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 525. [2021-06-05 04:03:48,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.8874045801526718) internal successors, (1513), 524 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:48,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1513 transitions. [2021-06-05 04:03:48,930 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1513 transitions. Word has length 18 [2021-06-05 04:03:48,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:48,930 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1513 transitions. [2021-06-05 04:03:48,930 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 04:03:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1513 transitions. [2021-06-05 04:03:48,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:48,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:48,931 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:49,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:49,145 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:49,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:49,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1437522508, now seen corresponding path program 45 times [2021-06-05 04:03:49,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:49,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576869939] [2021-06-05 04:03:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:49,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:49,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576869939] [2021-06-05 04:03:49,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576869939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:49,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961894591] [2021-06-05 04:03:49,193 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 04:03:49,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:03:49,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:49,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:49,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:49,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961894591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:49,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:49,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:03:49,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991060261] [2021-06-05 04:03:49,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:49,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:49,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:49,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:49,258 INFO L87 Difference]: Start difference. First operand 525 states and 1513 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 04:03:49,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:49,376 INFO L93 Difference]: Finished difference Result 683 states and 1762 transitions. [2021-06-05 04:03:49,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:03:49,377 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 18 [2021-06-05 04:03:49,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:49,379 INFO L225 Difference]: With dead ends: 683 [2021-06-05 04:03:49,379 INFO L226 Difference]: Without dead ends: 681 [2021-06-05 04:03:49,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:49,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-06-05 04:03:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 547. [2021-06-05 04:03:49,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.8956043956043955) internal successors, (1581), 546 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:49,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1581 transitions. [2021-06-05 04:03:49,391 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1581 transitions. Word has length 18 [2021-06-05 04:03:49,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:49,391 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1581 transitions. [2021-06-05 04:03:49,391 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 04:03:49,391 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1581 transitions. [2021-06-05 04:03:49,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:49,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:49,392 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:49,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 04:03:49,609 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:49,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:49,609 INFO L82 PathProgramCache]: Analyzing trace with hash 280226552, now seen corresponding path program 46 times [2021-06-05 04:03:49,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:49,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824150103] [2021-06-05 04:03:49,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:49,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:49,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824150103] [2021-06-05 04:03:49,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824150103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:49,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138269040] [2021-06-05 04:03:49,661 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 04:03:49,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:49,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:49,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:49,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:49,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138269040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:49,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:49,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:03:49,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972146398] [2021-06-05 04:03:49,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:49,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:49,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:49,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:49,728 INFO L87 Difference]: Start difference. First operand 547 states and 1581 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 04:03:49,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:49,774 INFO L93 Difference]: Finished difference Result 721 states and 1842 transitions. [2021-06-05 04:03:49,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:03:49,774 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 18 [2021-06-05 04:03:49,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:49,777 INFO L225 Difference]: With dead ends: 721 [2021-06-05 04:03:49,777 INFO L226 Difference]: Without dead ends: 721 [2021-06-05 04:03:49,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:49,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-05 04:03:49,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 548. [2021-06-05 04:03:49,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.895795246800731) internal successors, (1584), 547 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1584 transitions. [2021-06-05 04:03:49,788 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1584 transitions. Word has length 18 [2021-06-05 04:03:49,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:49,788 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1584 transitions. [2021-06-05 04:03:49,789 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 04:03:49,789 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1584 transitions. [2021-06-05 04:03:49,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:49,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:49,790 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:50,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 04:03:50,009 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:50,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:50,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1448820782, now seen corresponding path program 47 times [2021-06-05 04:03:50,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:50,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211562858] [2021-06-05 04:03:50,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:50,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:50,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211562858] [2021-06-05 04:03:50,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211562858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:50,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516437103] [2021-06-05 04:03:50,060 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 04:03:50,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:03:50,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:50,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:50,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:50,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516437103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:50,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:50,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:03:50,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141591820] [2021-06-05 04:03:50,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:03:50,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:50,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:03:50,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:50,138 INFO L87 Difference]: Start difference. First operand 548 states and 1584 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 04:03:50,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:50,208 INFO L93 Difference]: Finished difference Result 777 states and 1974 transitions. [2021-06-05 04:03:50,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:03:50,208 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 18 [2021-06-05 04:03:50,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:50,210 INFO L225 Difference]: With dead ends: 777 [2021-06-05 04:03:50,210 INFO L226 Difference]: Without dead ends: 777 [2021-06-05 04:03:50,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:03:50,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-06-05 04:03:50,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 523. [2021-06-05 04:03:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.875478927203065) internal successors, (1501), 522 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:50,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1501 transitions. [2021-06-05 04:03:50,230 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1501 transitions. Word has length 18 [2021-06-05 04:03:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:50,230 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1501 transitions. [2021-06-05 04:03:50,230 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 04:03:50,230 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1501 transitions. [2021-06-05 04:03:50,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:50,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:50,231 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:50,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 04:03:50,446 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:50,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:50,447 INFO L82 PathProgramCache]: Analyzing trace with hash -808676538, now seen corresponding path program 48 times [2021-06-05 04:03:50,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:50,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437361549] [2021-06-05 04:03:50,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:50,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:50,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437361549] [2021-06-05 04:03:50,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437361549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:50,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35404872] [2021-06-05 04:03:50,497 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 04:03:50,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:03:50,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:50,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:50,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:50,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35404872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:50,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:50,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:03:50,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445852010] [2021-06-05 04:03:50,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:50,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:50,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:50,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:50,567 INFO L87 Difference]: Start difference. First operand 523 states and 1501 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 04:03:50,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:50,684 INFO L93 Difference]: Finished difference Result 678 states and 1749 transitions. [2021-06-05 04:03:50,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:03:50,684 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 18 [2021-06-05 04:03:50,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:50,687 INFO L225 Difference]: With dead ends: 678 [2021-06-05 04:03:50,687 INFO L226 Difference]: Without dead ends: 676 [2021-06-05 04:03:50,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:50,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-05 04:03:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 547. [2021-06-05 04:03:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.880952380952381) internal successors, (1573), 546 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:50,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1573 transitions. [2021-06-05 04:03:50,698 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1573 transitions. Word has length 18 [2021-06-05 04:03:50,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:50,699 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1573 transitions. [2021-06-05 04:03:50,699 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 04:03:50,699 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1573 transitions. [2021-06-05 04:03:50,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:50,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:50,700 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:50,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-05 04:03:50,923 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:50,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:50,923 INFO L82 PathProgramCache]: Analyzing trace with hash 909072522, now seen corresponding path program 49 times [2021-06-05 04:03:50,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:50,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509531630] [2021-06-05 04:03:50,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:50,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:50,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509531630] [2021-06-05 04:03:50,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509531630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:50,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196156676] [2021-06-05 04:03:50,974 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 04:03:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:51,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:51,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:51,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196156676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:51,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:51,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:03:51,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235583036] [2021-06-05 04:03:51,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:51,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:51,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:51,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:51,042 INFO L87 Difference]: Start difference. First operand 547 states and 1573 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 04:03:51,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:51,092 INFO L93 Difference]: Finished difference Result 708 states and 1807 transitions. [2021-06-05 04:03:51,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:03:51,093 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 18 [2021-06-05 04:03:51,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:51,096 INFO L225 Difference]: With dead ends: 708 [2021-06-05 04:03:51,096 INFO L226 Difference]: Without dead ends: 708 [2021-06-05 04:03:51,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:51,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-06-05 04:03:51,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 547. [2021-06-05 04:03:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.880952380952381) internal successors, (1573), 546 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:51,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1573 transitions. [2021-06-05 04:03:51,107 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1573 transitions. Word has length 18 [2021-06-05 04:03:51,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:51,108 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1573 transitions. [2021-06-05 04:03:51,108 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 04:03:51,108 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1573 transitions. [2021-06-05 04:03:51,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:51,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:51,109 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:51,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:51,332 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:51,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:51,333 INFO L82 PathProgramCache]: Analyzing trace with hash -819974812, now seen corresponding path program 50 times [2021-06-05 04:03:51,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:51,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882302824] [2021-06-05 04:03:51,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:51,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:51,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882302824] [2021-06-05 04:03:51,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882302824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:51,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800648971] [2021-06-05 04:03:51,382 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 04:03:51,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:51,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:51,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:51,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:51,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800648971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:51,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:51,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:03:51,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711389547] [2021-06-05 04:03:51,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:03:51,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:51,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:03:51,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:51,460 INFO L87 Difference]: Start difference. First operand 547 states and 1573 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 04:03:51,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:51,544 INFO L93 Difference]: Finished difference Result 767 states and 1938 transitions. [2021-06-05 04:03:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:03:51,544 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 18 [2021-06-05 04:03:51,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:51,547 INFO L225 Difference]: With dead ends: 767 [2021-06-05 04:03:51,547 INFO L226 Difference]: Without dead ends: 767 [2021-06-05 04:03:51,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:03:51,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-06-05 04:03:51,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 520. [2021-06-05 04:03:51,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 2.859344894026975) internal successors, (1484), 519 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:51,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1484 transitions. [2021-06-05 04:03:51,557 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1484 transitions. Word has length 18 [2021-06-05 04:03:51,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:51,557 INFO L482 AbstractCegarLoop]: Abstraction has 520 states and 1484 transitions. [2021-06-05 04:03:51,557 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 04:03:51,557 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1484 transitions. [2021-06-05 04:03:51,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:51,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:51,558 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:51,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 04:03:51,773 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:51,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:51,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1414132682, now seen corresponding path program 51 times [2021-06-05 04:03:51,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:51,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934497751] [2021-06-05 04:03:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:51,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:51,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934497751] [2021-06-05 04:03:51,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934497751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:51,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380342585] [2021-06-05 04:03:51,831 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 04:03:51,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:03:51,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:51,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:51,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:51,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380342585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:51,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:51,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:03:51,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275199829] [2021-06-05 04:03:51,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:03:51,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:51,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:03:51,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:51,907 INFO L87 Difference]: Start difference. First operand 520 states and 1484 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 04:03:52,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:52,012 INFO L93 Difference]: Finished difference Result 976 states and 2581 transitions. [2021-06-05 04:03:52,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:03:52,013 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 18 [2021-06-05 04:03:52,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:52,016 INFO L225 Difference]: With dead ends: 976 [2021-06-05 04:03:52,016 INFO L226 Difference]: Without dead ends: 976 [2021-06-05 04:03:52,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:52,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-06-05 04:03:52,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 701. [2021-06-05 04:03:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.9371428571428573) internal successors, (2056), 700 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2056 transitions. [2021-06-05 04:03:52,029 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2056 transitions. Word has length 18 [2021-06-05 04:03:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:52,029 INFO L482 AbstractCegarLoop]: Abstraction has 701 states and 2056 transitions. [2021-06-05 04:03:52,030 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 04:03:52,030 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2056 transitions. [2021-06-05 04:03:52,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:52,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:52,031 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:52,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:52,249 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:52,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:52,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1505679348, now seen corresponding path program 52 times [2021-06-05 04:03:52,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:52,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994911349] [2021-06-05 04:03:52,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:52,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:52,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994911349] [2021-06-05 04:03:52,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994911349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:52,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786608175] [2021-06-05 04:03:52,298 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 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 04:03:52,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:52,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:52,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:52,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:52,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786608175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:52,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:52,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:03:52,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778350034] [2021-06-05 04:03:52,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:52,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:52,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:52,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:52,369 INFO L87 Difference]: Start difference. First operand 701 states and 2056 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 04:03:52,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:52,472 INFO L93 Difference]: Finished difference Result 888 states and 2419 transitions. [2021-06-05 04:03:52,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:03:52,472 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 18 [2021-06-05 04:03:52,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:52,476 INFO L225 Difference]: With dead ends: 888 [2021-06-05 04:03:52,476 INFO L226 Difference]: Without dead ends: 886 [2021-06-05 04:03:52,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:52,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-06-05 04:03:52,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 764. [2021-06-05 04:03:52,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.9436435124508518) internal successors, (2246), 763 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:52,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2246 transitions. [2021-06-05 04:03:52,490 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2246 transitions. Word has length 18 [2021-06-05 04:03:52,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:52,490 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2246 transitions. [2021-06-05 04:03:52,490 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 04:03:52,490 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2246 transitions. [2021-06-05 04:03:52,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:52,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:52,491 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:52,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable417 [2021-06-05 04:03:52,714 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:52,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:52,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1071538888, now seen corresponding path program 53 times [2021-06-05 04:03:52,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:52,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197702836] [2021-06-05 04:03:52,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:52,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:52,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197702836] [2021-06-05 04:03:52,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197702836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:52,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946370903] [2021-06-05 04:03:52,756 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 04:03:52,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:03:52,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:52,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:52,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:52,814 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:52,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946370903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:52,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:52,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:03:52,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797748804] [2021-06-05 04:03:52,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:52,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:52,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:52,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:52,815 INFO L87 Difference]: Start difference. First operand 764 states and 2246 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 04:03:52,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:52,866 INFO L93 Difference]: Finished difference Result 882 states and 2384 transitions. [2021-06-05 04:03:52,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:03:52,866 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 18 [2021-06-05 04:03:52,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:52,869 INFO L225 Difference]: With dead ends: 882 [2021-06-05 04:03:52,869 INFO L226 Difference]: Without dead ends: 882 [2021-06-05 04:03:52,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:52,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-06-05 04:03:52,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 755. [2021-06-05 04:03:52,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.9323607427055705) internal successors, (2211), 754 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2211 transitions. [2021-06-05 04:03:52,882 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2211 transitions. Word has length 18 [2021-06-05 04:03:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:52,882 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2211 transitions. [2021-06-05 04:03:52,882 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 04:03:52,882 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2211 transitions. [2021-06-05 04:03:52,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:52,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:52,883 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:53,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-05 04:03:53,089 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:53,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:53,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1494381074, now seen corresponding path program 54 times [2021-06-05 04:03:53,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:53,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945077419] [2021-06-05 04:03:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:53,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:53,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945077419] [2021-06-05 04:03:53,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945077419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:53,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197011510] [2021-06-05 04:03:53,144 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 04:03:53,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:03:53,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:53,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:53,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:53,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197011510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:53,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:53,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:03:53,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134129196] [2021-06-05 04:03:53,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:03:53,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:53,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:03:53,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:53,209 INFO L87 Difference]: Start difference. First operand 755 states and 2211 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 04:03:53,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:53,285 INFO L93 Difference]: Finished difference Result 936 states and 2510 transitions. [2021-06-05 04:03:53,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:03:53,285 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 18 [2021-06-05 04:03:53,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:53,288 INFO L225 Difference]: With dead ends: 936 [2021-06-05 04:03:53,289 INFO L226 Difference]: Without dead ends: 936 [2021-06-05 04:03:53,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:03:53,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-06-05 04:03:53,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 710. [2021-06-05 04:03:53,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 2.913963328631876) internal successors, (2066), 709 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:53,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2066 transitions. [2021-06-05 04:03:53,301 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2066 transitions. Word has length 18 [2021-06-05 04:03:53,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:53,301 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2066 transitions. [2021-06-05 04:03:53,301 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 04:03:53,301 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2066 transitions. [2021-06-05 04:03:53,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:53,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:53,303 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:53,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:53,525 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:53,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:53,525 INFO L82 PathProgramCache]: Analyzing trace with hash -566478728, now seen corresponding path program 55 times [2021-06-05 04:03:53,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:53,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324643378] [2021-06-05 04:03:53,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:53,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:53,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324643378] [2021-06-05 04:03:53,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324643378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:53,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461082303] [2021-06-05 04:03:53,577 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 04:03:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:53,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:53,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:53,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461082303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:53,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:53,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:03:53,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000483289] [2021-06-05 04:03:53,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:03:53,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:53,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:03:53,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:53,648 INFO L87 Difference]: Start difference. First operand 710 states and 2066 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 04:03:53,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:53,717 INFO L93 Difference]: Finished difference Result 1110 states and 3081 transitions. [2021-06-05 04:03:53,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:03:53,718 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 18 [2021-06-05 04:03:53,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:53,720 INFO L225 Difference]: With dead ends: 1110 [2021-06-05 04:03:53,720 INFO L226 Difference]: Without dead ends: 1110 [2021-06-05 04:03:53,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:03:53,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-06-05 04:03:53,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 950. [2021-06-05 04:03:53,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 2.9736564805057957) internal successors, (2822), 949 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:53,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 2822 transitions. [2021-06-05 04:03:53,734 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 2822 transitions. Word has length 18 [2021-06-05 04:03:53,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:53,734 INFO L482 AbstractCegarLoop]: Abstraction has 950 states and 2822 transitions. [2021-06-05 04:03:53,734 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 04:03:53,734 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 2822 transitions. [2021-06-05 04:03:53,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:53,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:53,735 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:53,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 04:03:53,948 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:53,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:53,949 INFO L82 PathProgramCache]: Analyzing trace with hash -28623150, now seen corresponding path program 56 times [2021-06-05 04:03:53,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:53,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183716835] [2021-06-05 04:03:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:54,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:54,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183716835] [2021-06-05 04:03:54,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183716835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:54,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872178447] [2021-06-05 04:03:54,001 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 04:03:54,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:54,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:54,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:54,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:54,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872178447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:54,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:54,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:03:54,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888262550] [2021-06-05 04:03:54,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:03:54,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:54,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:03:54,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:54,058 INFO L87 Difference]: Start difference. First operand 950 states and 2822 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 04:03:54,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:54,183 INFO L93 Difference]: Finished difference Result 1384 states and 3920 transitions. [2021-06-05 04:03:54,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:54,183 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 18 [2021-06-05 04:03:54,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:54,185 INFO L225 Difference]: With dead ends: 1384 [2021-06-05 04:03:54,185 INFO L226 Difference]: Without dead ends: 1384 [2021-06-05 04:03:54,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:03:54,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-06-05 04:03:54,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1190. [2021-06-05 04:03:54,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.015138772077376) internal successors, (3585), 1189 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:54,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3585 transitions. [2021-06-05 04:03:54,204 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3585 transitions. Word has length 18 [2021-06-05 04:03:54,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:54,204 INFO L482 AbstractCegarLoop]: Abstraction has 1190 states and 3585 transitions. [2021-06-05 04:03:54,204 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 04:03:54,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3585 transitions. [2021-06-05 04:03:54,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:54,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:54,206 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:54,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:54,413 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:54,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:54,413 INFO L82 PathProgramCache]: Analyzing trace with hash -928129974, now seen corresponding path program 57 times [2021-06-05 04:03:54,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:54,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727777349] [2021-06-05 04:03:54,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:54,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:54,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727777349] [2021-06-05 04:03:54,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727777349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:54,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519472810] [2021-06-05 04:03:54,466 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 04:03:54,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:03:54,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:54,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:54,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:54,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519472810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:54,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:54,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:03:54,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170029793] [2021-06-05 04:03:54,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:54,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:54,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:54,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:54,525 INFO L87 Difference]: Start difference. First operand 1190 states and 3585 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 04:03:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:54,628 INFO L93 Difference]: Finished difference Result 1540 states and 4536 transitions. [2021-06-05 04:03:54,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:54,628 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 18 [2021-06-05 04:03:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:54,631 INFO L225 Difference]: With dead ends: 1540 [2021-06-05 04:03:54,631 INFO L226 Difference]: Without dead ends: 1536 [2021-06-05 04:03:54,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-06-05 04:03:54,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1457. [2021-06-05 04:03:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 3.0494505494505493) internal successors, (4440), 1456 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:54,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 4440 transitions. [2021-06-05 04:03:54,655 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 4440 transitions. Word has length 18 [2021-06-05 04:03:54,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:54,655 INFO L482 AbstractCegarLoop]: Abstraction has 1457 states and 4440 transitions. [2021-06-05 04:03:54,655 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 04:03:54,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 4440 transitions. [2021-06-05 04:03:54,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:54,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:54,656 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:54,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 04:03:54,857 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:54,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:54,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1482288330, now seen corresponding path program 58 times [2021-06-05 04:03:54,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:54,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505206470] [2021-06-05 04:03:54,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:54,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:54,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505206470] [2021-06-05 04:03:54,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505206470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:54,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560918984] [2021-06-05 04:03:54,901 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 04:03:54,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:54,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:54,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:54,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:54,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560918984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:54,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:54,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:03:54,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818818156] [2021-06-05 04:03:54,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:54,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:54,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:54,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:54,969 INFO L87 Difference]: Start difference. First operand 1457 states and 4440 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 04:03:55,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:55,068 INFO L93 Difference]: Finished difference Result 1886 states and 5530 transitions. [2021-06-05 04:03:55,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:55,068 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 18 [2021-06-05 04:03:55,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:55,072 INFO L225 Difference]: With dead ends: 1886 [2021-06-05 04:03:55,072 INFO L226 Difference]: Without dead ends: 1886 [2021-06-05 04:03:55,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:55,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2021-06-05 04:03:55,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1647. [2021-06-05 04:03:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.0674362089914946) internal successors, (5049), 1646 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5049 transitions. [2021-06-05 04:03:55,105 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5049 transitions. Word has length 18 [2021-06-05 04:03:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:55,105 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5049 transitions. [2021-06-05 04:03:55,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 04:03:55,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5049 transitions. [2021-06-05 04:03:55,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:55,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:55,107 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:55,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:55,329 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:55,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:55,329 INFO L82 PathProgramCache]: Analyzing trace with hash 975942064, now seen corresponding path program 59 times [2021-06-05 04:03:55,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:55,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613193711] [2021-06-05 04:03:55,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:55,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:55,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613193711] [2021-06-05 04:03:55,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613193711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:55,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220528304] [2021-06-05 04:03:55,381 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 04:03:55,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:03:55,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:55,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:55,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:55,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220528304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:55,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:55,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:03:55,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193659851] [2021-06-05 04:03:55,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:03:55,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:55,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:03:55,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:55,451 INFO L87 Difference]: Start difference. First operand 1647 states and 5049 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 04:03:55,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:55,555 INFO L93 Difference]: Finished difference Result 2131 states and 6281 transitions. [2021-06-05 04:03:55,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:55,556 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 18 [2021-06-05 04:03:55,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:55,560 INFO L225 Difference]: With dead ends: 2131 [2021-06-05 04:03:55,560 INFO L226 Difference]: Without dead ends: 2131 [2021-06-05 04:03:55,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:55,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-06-05 04:03:55,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1134. [2021-06-05 04:03:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 3.0123565754633717) internal successors, (3413), 1133 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3413 transitions. [2021-06-05 04:03:55,592 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3413 transitions. Word has length 18 [2021-06-05 04:03:55,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:55,592 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 3413 transitions. [2021-06-05 04:03:55,592 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 04:03:55,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3413 transitions. [2021-06-05 04:03:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:55,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:55,594 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:55,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 04:03:55,794 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:55,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:55,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1513797642, now seen corresponding path program 60 times [2021-06-05 04:03:55,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:55,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191083670] [2021-06-05 04:03:55,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:55,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:55,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191083670] [2021-06-05 04:03:55,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191083670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:55,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384199972] [2021-06-05 04:03:55,848 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 04:03:55,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:03:55,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:55,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:55,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:55,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384199972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:55,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:55,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:03:55,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558657589] [2021-06-05 04:03:55,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:03:55,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:55,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:03:55,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:55,950 INFO L87 Difference]: Start difference. First operand 1134 states and 3413 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 04:03:56,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:56,073 INFO L93 Difference]: Finished difference Result 1469 states and 4201 transitions. [2021-06-05 04:03:56,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:56,074 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 18 [2021-06-05 04:03:56,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:56,079 INFO L225 Difference]: With dead ends: 1469 [2021-06-05 04:03:56,079 INFO L226 Difference]: Without dead ends: 1469 [2021-06-05 04:03:56,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:03:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-06-05 04:03:56,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1145. [2021-06-05 04:03:56,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 3.015734265734266) internal successors, (3450), 1144 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:56,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 3450 transitions. [2021-06-05 04:03:56,102 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 3450 transitions. Word has length 18 [2021-06-05 04:03:56,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:56,102 INFO L482 AbstractCegarLoop]: Abstraction has 1145 states and 3450 transitions. [2021-06-05 04:03:56,102 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 04:03:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 3450 transitions. [2021-06-05 04:03:56,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:56,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:56,104 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:56,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:56,328 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:56,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:56,328 INFO L82 PathProgramCache]: Analyzing trace with hash 236267782, now seen corresponding path program 61 times [2021-06-05 04:03:56,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:56,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680873648] [2021-06-05 04:03:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:56,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:56,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680873648] [2021-06-05 04:03:56,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680873648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:56,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104711208] [2021-06-05 04:03:56,374 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 04:03:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:56,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:56,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:56,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104711208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:56,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:56,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:03:56,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826333203] [2021-06-05 04:03:56,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:56,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:56,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:56,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:56,437 INFO L87 Difference]: Start difference. First operand 1145 states and 3450 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 04:03:56,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:56,543 INFO L93 Difference]: Finished difference Result 1280 states and 3655 transitions. [2021-06-05 04:03:56,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:03:56,544 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 18 [2021-06-05 04:03:56,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:56,545 INFO L225 Difference]: With dead ends: 1280 [2021-06-05 04:03:56,545 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 04:03:56,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:56,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 04:03:56,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1116. [2021-06-05 04:03:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 3.0053811659192826) internal successors, (3351), 1115 states have internal predecessors, (3351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:56,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3351 transitions. [2021-06-05 04:03:56,558 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3351 transitions. Word has length 18 [2021-06-05 04:03:56,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:56,558 INFO L482 AbstractCegarLoop]: Abstraction has 1116 states and 3351 transitions. [2021-06-05 04:03:56,559 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 04:03:56,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3351 transitions. [2021-06-05 04:03:56,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:56,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:56,560 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:56,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-05 04:03:56,783 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:56,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:56,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1954016842, now seen corresponding path program 62 times [2021-06-05 04:03:56,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:56,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669824784] [2021-06-05 04:03:56,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:56,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:56,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669824784] [2021-06-05 04:03:56,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669824784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:56,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348399854] [2021-06-05 04:03:56,830 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 04:03:56,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:56,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:56,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:56,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:56,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348399854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:56,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:56,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:03:56,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167468600] [2021-06-05 04:03:56,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:56,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:56,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:56,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:56,896 INFO L87 Difference]: Start difference. First operand 1116 states and 3351 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 04:03:56,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:56,950 INFO L93 Difference]: Finished difference Result 1248 states and 3538 transitions. [2021-06-05 04:03:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:03:56,950 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 18 [2021-06-05 04:03:56,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:56,953 INFO L225 Difference]: With dead ends: 1248 [2021-06-05 04:03:56,953 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 04:03:56,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:56,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 04:03:56,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1114. [2021-06-05 04:03:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.0017969451931714) internal successors, (3341), 1113 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3341 transitions. [2021-06-05 04:03:56,969 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3341 transitions. Word has length 18 [2021-06-05 04:03:56,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:56,970 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 3341 transitions. [2021-06-05 04:03:56,970 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 04:03:56,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3341 transitions. [2021-06-05 04:03:56,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:56,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:56,971 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:57,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:57,192 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:57,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:57,192 INFO L82 PathProgramCache]: Analyzing trace with hash 224969508, now seen corresponding path program 63 times [2021-06-05 04:03:57,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:57,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818510255] [2021-06-05 04:03:57,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:57,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:57,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818510255] [2021-06-05 04:03:57,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818510255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:57,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852931922] [2021-06-05 04:03:57,239 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 04:03:57,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:03:57,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:57,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:57,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:57,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852931922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:57,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:57,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:03:57,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932034007] [2021-06-05 04:03:57,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:03:57,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:57,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:03:57,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:57,313 INFO L87 Difference]: Start difference. First operand 1114 states and 3341 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 04:03:57,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:57,377 INFO L93 Difference]: Finished difference Result 1212 states and 3446 transitions. [2021-06-05 04:03:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:03:57,378 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 18 [2021-06-05 04:03:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:57,380 INFO L225 Difference]: With dead ends: 1212 [2021-06-05 04:03:57,380 INFO L226 Difference]: Without dead ends: 1212 [2021-06-05 04:03:57,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:03:57,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-06-05 04:03:57,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1096. [2021-06-05 04:03:57,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 2.992694063926941) internal successors, (3277), 1095 states have internal predecessors, (3277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:57,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3277 transitions. [2021-06-05 04:03:57,395 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3277 transitions. Word has length 18 [2021-06-05 04:03:57,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:57,395 INFO L482 AbstractCegarLoop]: Abstraction has 1096 states and 3277 transitions. [2021-06-05 04:03:57,395 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 04:03:57,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3277 transitions. [2021-06-05 04:03:57,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:57,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:57,396 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:57,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:57,619 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:57,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:57,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1835890294, now seen corresponding path program 64 times [2021-06-05 04:03:57,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:57,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102197824] [2021-06-05 04:03:57,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:57,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:57,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102197824] [2021-06-05 04:03:57,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102197824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:57,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054324014] [2021-06-05 04:03:57,680 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 04:03:57,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:57,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:57,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:57,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:57,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054324014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:57,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:57,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:03:57,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221064402] [2021-06-05 04:03:57,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:03:57,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:57,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:03:57,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:57,757 INFO L87 Difference]: Start difference. First operand 1096 states and 3277 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:03:57,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:57,859 INFO L93 Difference]: Finished difference Result 1269 states and 3581 transitions. [2021-06-05 04:03:57,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:03:57,860 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-06-05 04:03:57,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:57,862 INFO L225 Difference]: With dead ends: 1269 [2021-06-05 04:03:57,862 INFO L226 Difference]: Without dead ends: 1269 [2021-06-05 04:03:57,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:57,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-06-05 04:03:57,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1069. [2021-06-05 04:03:57,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 2.985955056179775) internal successors, (3189), 1068 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3189 transitions. [2021-06-05 04:03:57,877 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3189 transitions. Word has length 18 [2021-06-05 04:03:57,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:57,877 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 3189 transitions. [2021-06-05 04:03:57,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:03:57,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3189 transitions. [2021-06-05 04:03:57,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:57,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:57,878 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:58,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2021-06-05 04:03:58,101 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:58,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:58,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1298034716, now seen corresponding path program 65 times [2021-06-05 04:03:58,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:58,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280519195] [2021-06-05 04:03:58,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:58,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:58,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280519195] [2021-06-05 04:03:58,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280519195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:58,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620529741] [2021-06-05 04:03:58,156 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 04:03:58,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:03:58,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:58,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:58,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:58,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620529741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:58,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:58,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:03:58,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719124143] [2021-06-05 04:03:58,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:03:58,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:58,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:03:58,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:58,236 INFO L87 Difference]: Start difference. First operand 1069 states and 3189 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:03:58,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:58,345 INFO L93 Difference]: Finished difference Result 1385 states and 3940 transitions. [2021-06-05 04:03:58,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:58,346 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-06-05 04:03:58,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:58,348 INFO L225 Difference]: With dead ends: 1385 [2021-06-05 04:03:58,348 INFO L226 Difference]: Without dead ends: 1385 [2021-06-05 04:03:58,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:03:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-06-05 04:03:58,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1117. [2021-06-05 04:03:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.9946236559139785) internal successors, (3342), 1116 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:58,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 3342 transitions. [2021-06-05 04:03:58,366 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 3342 transitions. Word has length 18 [2021-06-05 04:03:58,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:58,366 INFO L482 AbstractCegarLoop]: Abstraction has 1117 states and 3342 transitions. [2021-06-05 04:03:58,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:03:58,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 3342 transitions. [2021-06-05 04:03:58,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:58,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:58,368 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:58,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 04:03:58,589 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:58,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:58,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1804380982, now seen corresponding path program 66 times [2021-06-05 04:03:58,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:58,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345127507] [2021-06-05 04:03:58,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:58,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:58,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345127507] [2021-06-05 04:03:58,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345127507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:58,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825447639] [2021-06-05 04:03:58,644 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 04:03:58,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:03:58,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:58,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:58,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:58,714 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:58,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825447639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:58,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:58,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:03:58,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124355750] [2021-06-05 04:03:58,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:03:58,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:58,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:03:58,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:58,715 INFO L87 Difference]: Start difference. First operand 1117 states and 3342 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:03:58,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:58,897 INFO L93 Difference]: Finished difference Result 1491 states and 4244 transitions. [2021-06-05 04:03:58,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:03:58,897 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-06-05 04:03:58,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:58,900 INFO L225 Difference]: With dead ends: 1491 [2021-06-05 04:03:58,900 INFO L226 Difference]: Without dead ends: 1491 [2021-06-05 04:03:58,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:03:58,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-06-05 04:03:58,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1299. [2021-06-05 04:03:58,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.010785824345146) internal successors, (3908), 1298 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3908 transitions. [2021-06-05 04:03:58,933 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3908 transitions. Word has length 18 [2021-06-05 04:03:58,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:58,933 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 3908 transitions. [2021-06-05 04:03:58,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:03:58,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3908 transitions. [2021-06-05 04:03:58,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:58,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:58,935 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:59,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:59,157 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:59,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:59,157 INFO L82 PathProgramCache]: Analyzing trace with hash -357725678, now seen corresponding path program 67 times [2021-06-05 04:03:59,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:59,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227491841] [2021-06-05 04:03:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:59,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:59,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227491841] [2021-06-05 04:03:59,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227491841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:59,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412079957] [2021-06-05 04:03:59,207 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 04:03:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:59,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:59,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:59,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412079957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:59,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:59,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:03:59,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275641555] [2021-06-05 04:03:59,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:59,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:59,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:59,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:59,267 INFO L87 Difference]: Start difference. First operand 1299 states and 3908 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 04:03:59,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:59,403 INFO L93 Difference]: Finished difference Result 1466 states and 4238 transitions. [2021-06-05 04:03:59,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:03:59,403 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 18 [2021-06-05 04:03:59,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:59,406 INFO L225 Difference]: With dead ends: 1466 [2021-06-05 04:03:59,406 INFO L226 Difference]: Without dead ends: 1462 [2021-06-05 04:03:59,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:03:59,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-06-05 04:03:59,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1236. [2021-06-05 04:03:59,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.0) internal successors, (3705), 1235 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:59,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 3705 transitions. [2021-06-05 04:03:59,425 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 3705 transitions. Word has length 18 [2021-06-05 04:03:59,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:59,425 INFO L482 AbstractCegarLoop]: Abstraction has 1236 states and 3705 transitions. [2021-06-05 04:03:59,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 04:03:59,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 3705 transitions. [2021-06-05 04:03:59,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:59,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:59,427 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:59,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 04:03:59,641 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:59,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:59,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2084201938, now seen corresponding path program 68 times [2021-06-05 04:03:59,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:59,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042552515] [2021-06-05 04:03:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:59,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:59,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042552515] [2021-06-05 04:03:59,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042552515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:59,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456730131] [2021-06-05 04:03:59,688 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 04:03:59,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:59,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:59,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:03:59,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:59,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456730131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:59,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:59,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:03:59,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688400049] [2021-06-05 04:03:59,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:03:59,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:59,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:03:59,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:59,769 INFO L87 Difference]: Start difference. First operand 1236 states and 3705 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 04:03:59,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:59,911 INFO L93 Difference]: Finished difference Result 1717 states and 4942 transitions. [2021-06-05 04:03:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:59,912 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 18 [2021-06-05 04:03:59,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:59,914 INFO L225 Difference]: With dead ends: 1717 [2021-06-05 04:03:59,914 INFO L226 Difference]: Without dead ends: 1717 [2021-06-05 04:03:59,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:03:59,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2021-06-05 04:03:59,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1445. [2021-06-05 04:03:59,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 3.020083102493075) internal successors, (4361), 1444 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:59,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 4361 transitions. [2021-06-05 04:03:59,939 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 4361 transitions. Word has length 18 [2021-06-05 04:03:59,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:59,939 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 4361 transitions. [2021-06-05 04:03:59,939 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 04:03:59,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 4361 transitions. [2021-06-05 04:03:59,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:59,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:59,941 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:00,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 04:04:00,165 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:00,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:00,165 INFO L82 PathProgramCache]: Analyzing trace with hash -727630420, now seen corresponding path program 69 times [2021-06-05 04:04:00,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:00,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399546915] [2021-06-05 04:04:00,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:00,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:00,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399546915] [2021-06-05 04:04:00,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399546915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:00,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599347887] [2021-06-05 04:04:00,219 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 04:04:00,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:04:00,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:00,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:00,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:00,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599347887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:00,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:00,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:04:00,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297311696] [2021-06-05 04:04:00,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:00,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:00,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:00,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:00,287 INFO L87 Difference]: Start difference. First operand 1445 states and 4361 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:04:00,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:00,411 INFO L93 Difference]: Finished difference Result 1815 states and 5279 transitions. [2021-06-05 04:04:00,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:04:00,411 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-06-05 04:04:00,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:00,413 INFO L225 Difference]: With dead ends: 1815 [2021-06-05 04:04:00,413 INFO L226 Difference]: Without dead ends: 1815 [2021-06-05 04:04:00,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:00,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-06-05 04:04:00,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1189. [2021-06-05 04:04:00,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.9974747474747474) internal successors, (3561), 1188 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:00,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3561 transitions. [2021-06-05 04:04:00,433 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3561 transitions. Word has length 18 [2021-06-05 04:04:00,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:00,433 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3561 transitions. [2021-06-05 04:04:00,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:04:00,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3561 transitions. [2021-06-05 04:04:00,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:00,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:00,435 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:00,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 04:04:00,645 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:00,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:00,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1233976686, now seen corresponding path program 70 times [2021-06-05 04:04:00,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:00,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191961736] [2021-06-05 04:04:00,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:00,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:00,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191961736] [2021-06-05 04:04:00,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191961736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:00,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495673885] [2021-06-05 04:04:00,717 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 04:04:00,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:00,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:00,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:00,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:00,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495673885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:00,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:00,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:04:00,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661630709] [2021-06-05 04:04:00,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:00,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:00,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:00,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:00,781 INFO L87 Difference]: Start difference. First operand 1189 states and 3561 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:04:00,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:00,945 INFO L93 Difference]: Finished difference Result 1539 states and 4366 transitions. [2021-06-05 04:04:00,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:04:00,945 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-06-05 04:04:00,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:00,946 INFO L225 Difference]: With dead ends: 1539 [2021-06-05 04:04:00,946 INFO L226 Difference]: Without dead ends: 1539 [2021-06-05 04:04:00,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:04:00,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-06-05 04:04:00,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1195. [2021-06-05 04:04:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 2.9983249581239533) internal successors, (3580), 1194 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 3580 transitions. [2021-06-05 04:04:00,959 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 3580 transitions. Word has length 18 [2021-06-05 04:04:00,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:00,959 INFO L482 AbstractCegarLoop]: Abstraction has 1195 states and 3580 transitions. [2021-06-05 04:04:00,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:04:00,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 3580 transitions. [2021-06-05 04:04:00,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:00,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:00,960 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:01,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-05 04:04:01,161 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:01,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:01,161 INFO L82 PathProgramCache]: Analyzing trace with hash -460785100, now seen corresponding path program 71 times [2021-06-05 04:04:01,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:01,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824873191] [2021-06-05 04:04:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:01,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:01,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824873191] [2021-06-05 04:04:01,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824873191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:01,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960815941] [2021-06-05 04:04:01,224 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 04:04:01,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:04:01,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:01,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:01,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:01,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960815941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:01,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:01,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:01,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192708455] [2021-06-05 04:04:01,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:01,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:01,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:01,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:01,286 INFO L87 Difference]: Start difference. First operand 1195 states and 3580 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 04:04:01,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:01,400 INFO L93 Difference]: Finished difference Result 1319 states and 3767 transitions. [2021-06-05 04:04:01,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:01,401 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 18 [2021-06-05 04:04:01,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:01,402 INFO L225 Difference]: With dead ends: 1319 [2021-06-05 04:04:01,402 INFO L226 Difference]: Without dead ends: 1315 [2021-06-05 04:04:01,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:01,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-06-05 04:04:01,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1219. [2021-06-05 04:04:01,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.0) internal successors, (3654), 1218 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:01,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 3654 transitions. [2021-06-05 04:04:01,417 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 3654 transitions. Word has length 18 [2021-06-05 04:04:01,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:01,417 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 3654 transitions. [2021-06-05 04:04:01,417 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 04:04:01,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 3654 transitions. [2021-06-05 04:04:01,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:01,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:01,419 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:01,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 04:04:01,641 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:01,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:01,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1256963960, now seen corresponding path program 72 times [2021-06-05 04:04:01,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:01,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809539233] [2021-06-05 04:04:01,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:01,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:01,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809539233] [2021-06-05 04:04:01,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809539233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:01,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489475337] [2021-06-05 04:04:01,686 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 04:04:01,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:04:01,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:01,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:01,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:01,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489475337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:01,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:01,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:01,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352705156] [2021-06-05 04:04:01,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:01,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:01,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:01,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:01,751 INFO L87 Difference]: Start difference. First operand 1219 states and 3654 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 04:04:01,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:01,818 INFO L93 Difference]: Finished difference Result 1350 states and 3852 transitions. [2021-06-05 04:04:01,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:04:01,818 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 18 [2021-06-05 04:04:01,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:01,819 INFO L225 Difference]: With dead ends: 1350 [2021-06-05 04:04:01,820 INFO L226 Difference]: Without dead ends: 1350 [2021-06-05 04:04:01,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:01,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-05 04:04:01,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1220. [2021-06-05 04:04:01,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1219 states have (on average 3.0) internal successors, (3657), 1219 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 3657 transitions. [2021-06-05 04:04:01,834 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 3657 transitions. Word has length 18 [2021-06-05 04:04:01,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:01,834 INFO L482 AbstractCegarLoop]: Abstraction has 1220 states and 3657 transitions. [2021-06-05 04:04:01,834 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 04:04:01,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 3657 transitions. [2021-06-05 04:04:01,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:01,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:01,835 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:02,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:02,036 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:02,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:02,037 INFO L82 PathProgramCache]: Analyzing trace with hash -472083374, now seen corresponding path program 73 times [2021-06-05 04:04:02,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:02,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681307063] [2021-06-05 04:04:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:02,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:02,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681307063] [2021-06-05 04:04:02,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681307063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:02,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36130925] [2021-06-05 04:04:02,086 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 04:04:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:02,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:02,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:02,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36130925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:02,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:02,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:04:02,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380777134] [2021-06-05 04:04:02,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:02,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:02,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:02,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:02,169 INFO L87 Difference]: Start difference. First operand 1220 states and 3657 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 04:04:02,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:02,246 INFO L93 Difference]: Finished difference Result 1356 states and 3865 transitions. [2021-06-05 04:04:02,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:04:02,247 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 18 [2021-06-05 04:04:02,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:02,248 INFO L225 Difference]: With dead ends: 1356 [2021-06-05 04:04:02,248 INFO L226 Difference]: Without dead ends: 1356 [2021-06-05 04:04:02,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:02,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-05 04:04:02,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1215. [2021-06-05 04:04:02,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.9975288303130148) internal successors, (3639), 1214 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:02,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3639 transitions. [2021-06-05 04:04:02,262 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3639 transitions. Word has length 18 [2021-06-05 04:04:02,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:02,262 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 3639 transitions. [2021-06-05 04:04:02,262 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 04:04:02,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3639 transitions. [2021-06-05 04:04:02,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:02,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:02,263 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:02,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:02,464 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:02,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:02,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1762024120, now seen corresponding path program 74 times [2021-06-05 04:04:02,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:02,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509299521] [2021-06-05 04:04:02,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:02,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:02,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509299521] [2021-06-05 04:04:02,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509299521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:02,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607490740] [2021-06-05 04:04:02,520 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 04:04:02,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:02,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:02,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:02,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:02,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607490740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:02,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:02,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:04:02,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709911104] [2021-06-05 04:04:02,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:02,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:02,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:02,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:02,586 INFO L87 Difference]: Start difference. First operand 1215 states and 3639 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 04:04:02,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:02,639 INFO L93 Difference]: Finished difference Result 1623 states and 4723 transitions. [2021-06-05 04:04:02,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:04:02,639 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 18 [2021-06-05 04:04:02,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:02,641 INFO L225 Difference]: With dead ends: 1623 [2021-06-05 04:04:02,641 INFO L226 Difference]: Without dead ends: 1623 [2021-06-05 04:04:02,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:02,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-06-05 04:04:02,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1529. [2021-06-05 04:04:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.017670157068063) internal successors, (4611), 1528 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:02,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4611 transitions. [2021-06-05 04:04:02,656 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4611 transitions. Word has length 18 [2021-06-05 04:04:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:02,656 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 4611 transitions. [2021-06-05 04:04:02,656 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 04:04:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4611 transitions. [2021-06-05 04:04:02,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:02,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:02,658 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:02,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:02,858 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:02,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:02,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1995087598, now seen corresponding path program 75 times [2021-06-05 04:04:02,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:02,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683349851] [2021-06-05 04:04:02,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:02,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:02,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683349851] [2021-06-05 04:04:02,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683349851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:02,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449530663] [2021-06-05 04:04:02,906 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 04:04:02,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:04:02,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:02,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:02,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:02,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449530663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:02,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:02,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:04:02,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794517809] [2021-06-05 04:04:02,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:02,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:02,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:02,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:02,987 INFO L87 Difference]: Start difference. First operand 1529 states and 4611 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:04:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:03,097 INFO L93 Difference]: Finished difference Result 1693 states and 4893 transitions. [2021-06-05 04:04:03,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:04:03,097 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-06-05 04:04:03,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:03,099 INFO L225 Difference]: With dead ends: 1693 [2021-06-05 04:04:03,099 INFO L226 Difference]: Without dead ends: 1693 [2021-06-05 04:04:03,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:04:03,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-06-05 04:04:03,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1537. [2021-06-05 04:04:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.017578125) internal successors, (4635), 1536 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:03,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 4635 transitions. [2021-06-05 04:04:03,117 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 4635 transitions. Word has length 18 [2021-06-05 04:04:03,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:03,117 INFO L482 AbstractCegarLoop]: Abstraction has 1537 states and 4635 transitions. [2021-06-05 04:04:03,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:04:03,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 4635 transitions. [2021-06-05 04:04:03,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:03,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:03,118 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:03,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:03,319 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:03,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1793533432, now seen corresponding path program 76 times [2021-06-05 04:04:03,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:03,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55169064] [2021-06-05 04:04:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:03,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:03,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55169064] [2021-06-05 04:04:03,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55169064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:03,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004571699] [2021-06-05 04:04:03,374 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 04:04:03,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:03,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:03,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:03,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:03,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004571699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:03,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:03,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:04:03,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111928023] [2021-06-05 04:04:03,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:03,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:03,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:03,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:03,435 INFO L87 Difference]: Start difference. First operand 1537 states and 4635 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:04:03,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:03,559 INFO L93 Difference]: Finished difference Result 1777 states and 5185 transitions. [2021-06-05 04:04:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:04:03,560 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-06-05 04:04:03,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:03,561 INFO L225 Difference]: With dead ends: 1777 [2021-06-05 04:04:03,561 INFO L226 Difference]: Without dead ends: 1777 [2021-06-05 04:04:03,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:04:03,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-05 04:04:03,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1651. [2021-06-05 04:04:03,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.0187878787878786) internal successors, (4981), 1650 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:03,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 4981 transitions. [2021-06-05 04:04:03,601 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 4981 transitions. Word has length 18 [2021-06-05 04:04:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:03,601 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 4981 transitions. [2021-06-05 04:04:03,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:04:03,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 4981 transitions. [2021-06-05 04:04:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:03,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:03,602 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:03,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 04:04:03,803 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:03,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:03,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1018298926, now seen corresponding path program 77 times [2021-06-05 04:04:03,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:03,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191789466] [2021-06-05 04:04:03,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:03,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:03,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191789466] [2021-06-05 04:04:03,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191789466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:03,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074720392] [2021-06-05 04:04:03,860 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 04:04:03,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:04:03,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:03,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:03,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:03,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074720392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:03,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:03,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:04:03,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017117275] [2021-06-05 04:04:03,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:03,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:03,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:03,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:03,923 INFO L87 Difference]: Start difference. First operand 1651 states and 4981 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:04:04,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:04,129 INFO L93 Difference]: Finished difference Result 1973 states and 5717 transitions. [2021-06-05 04:04:04,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:04:04,129 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 18 [2021-06-05 04:04:04,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:04,131 INFO L225 Difference]: With dead ends: 1973 [2021-06-05 04:04:04,131 INFO L226 Difference]: Without dead ends: 1973 [2021-06-05 04:04:04,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 168.6ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:04:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-06-05 04:04:04,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1718. [2021-06-05 04:04:04,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.018054746651136) internal successors, (5182), 1717 states have internal predecessors, (5182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:04,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5182 transitions. [2021-06-05 04:04:04,149 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5182 transitions. Word has length 18 [2021-06-05 04:04:04,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:04,149 INFO L482 AbstractCegarLoop]: Abstraction has 1718 states and 5182 transitions. [2021-06-05 04:04:04,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 04:04:04,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5182 transitions. [2021-06-05 04:04:04,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:04,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:04,151 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:04,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 04:04:04,357 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:04,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:04,357 INFO L82 PathProgramCache]: Analyzing trace with hash 144938314, now seen corresponding path program 78 times [2021-06-05 04:04:04,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:04,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404940977] [2021-06-05 04:04:04,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:04,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:04,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404940977] [2021-06-05 04:04:04,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404940977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:04,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430698236] [2021-06-05 04:04:04,423 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 04:04:04,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:04:04,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:04,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:04,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:04,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430698236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:04,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:04,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-06-05 04:04:04,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940425982] [2021-06-05 04:04:04,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:04,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:04,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:04,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:04,497 INFO L87 Difference]: Start difference. First operand 1718 states and 5182 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 04:04:04,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:04,685 INFO L93 Difference]: Finished difference Result 1834 states and 5328 transitions. [2021-06-05 04:04:04,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:04:04,685 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 18 [2021-06-05 04:04:04,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:04,687 INFO L225 Difference]: With dead ends: 1834 [2021-06-05 04:04:04,687 INFO L226 Difference]: Without dead ends: 1830 [2021-06-05 04:04:04,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 156.8ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2021-06-05 04:04:04,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1663. [2021-06-05 04:04:04,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.0138387484957883) internal successors, (5009), 1662 states have internal predecessors, (5009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:04,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5009 transitions. [2021-06-05 04:04:04,712 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5009 transitions. Word has length 18 [2021-06-05 04:04:04,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:04,712 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 5009 transitions. [2021-06-05 04:04:04,712 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 04:04:04,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5009 transitions. [2021-06-05 04:04:04,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:04,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:04,714 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:04,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:04,929 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:04,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:04,929 INFO L82 PathProgramCache]: Analyzing trace with hash -731312694, now seen corresponding path program 79 times [2021-06-05 04:04:04,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:04,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722228303] [2021-06-05 04:04:04,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:04,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:04,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722228303] [2021-06-05 04:04:04,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722228303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:04,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242593026] [2021-06-05 04:04:04,995 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 04:04:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:05,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:05,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:05,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242593026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:05,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:05,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 04:04:05,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075776054] [2021-06-05 04:04:05,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:05,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:05,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:05,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:05,079 INFO L87 Difference]: Start difference. First operand 1663 states and 5009 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 04:04:05,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:05,367 INFO L93 Difference]: Finished difference Result 2513 states and 7307 transitions. [2021-06-05 04:04:05,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:04:05,367 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 18 [2021-06-05 04:04:05,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:05,370 INFO L225 Difference]: With dead ends: 2513 [2021-06-05 04:04:05,370 INFO L226 Difference]: Without dead ends: 2513 [2021-06-05 04:04:05,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=375, Invalid=747, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:04:05,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-06-05 04:04:05,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1818. [2021-06-05 04:04:05,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.0181618051733627) internal successors, (5484), 1817 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:05,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 5484 transitions. [2021-06-05 04:04:05,401 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 5484 transitions. Word has length 18 [2021-06-05 04:04:05,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:05,401 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 5484 transitions. [2021-06-05 04:04:05,401 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 04:04:05,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 5484 transitions. [2021-06-05 04:04:05,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:05,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:05,403 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:05,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 04:04:05,626 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:05,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:05,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1998769872, now seen corresponding path program 80 times [2021-06-05 04:04:05,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:05,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051476141] [2021-06-05 04:04:05,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:05,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:05,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051476141] [2021-06-05 04:04:05,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051476141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:05,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045974114] [2021-06-05 04:04:05,684 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 04:04:05,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:05,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:05,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:05,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:05,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045974114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:05,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:05,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 04:04:05,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426599396] [2021-06-05 04:04:05,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:05,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:05,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:05,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:05,755 INFO L87 Difference]: Start difference. First operand 1818 states and 5484 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 04:04:05,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:05,983 INFO L93 Difference]: Finished difference Result 2122 states and 6163 transitions. [2021-06-05 04:04:05,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:04:05,983 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 18 [2021-06-05 04:04:05,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:05,985 INFO L225 Difference]: With dead ends: 2122 [2021-06-05 04:04:05,986 INFO L226 Difference]: Without dead ends: 2122 [2021-06-05 04:04:05,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=331, Invalid=661, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:04:05,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-06-05 04:04:06,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1809. [2021-06-05 04:04:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.019358407079646) internal successors, (5459), 1808 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:06,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 5459 transitions. [2021-06-05 04:04:06,007 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 5459 transitions. Word has length 18 [2021-06-05 04:04:06,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:06,007 INFO L482 AbstractCegarLoop]: Abstraction has 1809 states and 5459 transitions. [2021-06-05 04:04:06,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:06,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 5459 transitions. [2021-06-05 04:04:06,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:06,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:06,009 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:06,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:06,211 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:06,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:06,211 INFO L82 PathProgramCache]: Analyzing trace with hash -515634934, now seen corresponding path program 81 times [2021-06-05 04:04:06,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:06,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312772478] [2021-06-05 04:04:06,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:06,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:06,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312772478] [2021-06-05 04:04:06,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312772478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:06,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485227131] [2021-06-05 04:04:06,310 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 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 04:04:06,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:04:06,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:06,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:06,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:06,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485227131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:06,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:06,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 04:04:06,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157434055] [2021-06-05 04:04:06,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:06,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:06,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:06,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:06,382 INFO L87 Difference]: Start difference. First operand 1809 states and 5459 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 04:04:06,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:06,616 INFO L93 Difference]: Finished difference Result 2135 states and 6194 transitions. [2021-06-05 04:04:06,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:04:06,616 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 18 [2021-06-05 04:04:06,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:06,618 INFO L225 Difference]: With dead ends: 2135 [2021-06-05 04:04:06,618 INFO L226 Difference]: Without dead ends: 2135 [2021-06-05 04:04:06,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 255.5ms TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:04:06,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-06-05 04:04:06,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1814. [2021-06-05 04:04:06,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.0193050193050195) internal successors, (5474), 1813 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5474 transitions. [2021-06-05 04:04:06,641 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5474 transitions. Word has length 18 [2021-06-05 04:04:06,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:06,641 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5474 transitions. [2021-06-05 04:04:06,641 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 04:04:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5474 transitions. [2021-06-05 04:04:06,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:06,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:06,644 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:06,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 04:04:06,854 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:06,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:06,855 INFO L82 PathProgramCache]: Analyzing trace with hash -594587962, now seen corresponding path program 82 times [2021-06-05 04:04:06,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:06,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846076494] [2021-06-05 04:04:06,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:06,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:06,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846076494] [2021-06-05 04:04:06,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846076494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:06,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876781680] [2021-06-05 04:04:06,915 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 04:04:06,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:06,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:06,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:06,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:06,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876781680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:06,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:06,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-06-05 04:04:06,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70766860] [2021-06-05 04:04:06,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:06,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:06,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:06,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:06,983 INFO L87 Difference]: Start difference. First operand 1814 states and 5474 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 04:04:07,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:07,115 INFO L93 Difference]: Finished difference Result 2025 states and 5942 transitions. [2021-06-05 04:04:07,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:04:07,115 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 18 [2021-06-05 04:04:07,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:07,117 INFO L225 Difference]: With dead ends: 2025 [2021-06-05 04:04:07,117 INFO L226 Difference]: Without dead ends: 2023 [2021-06-05 04:04:07,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:04:07,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-06-05 04:04:07,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1929. [2021-06-05 04:04:07,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1928 states have (on average 3.0264522821576763) internal successors, (5835), 1928 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:07,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 5835 transitions. [2021-06-05 04:04:07,138 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 5835 transitions. Word has length 18 [2021-06-05 04:04:07,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:07,138 INFO L482 AbstractCegarLoop]: Abstraction has 1929 states and 5835 transitions. [2021-06-05 04:04:07,138 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 04:04:07,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 5835 transitions. [2021-06-05 04:04:07,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:07,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:07,140 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:07,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-05 04:04:07,341 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:07,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:07,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1123161098, now seen corresponding path program 83 times [2021-06-05 04:04:07,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:07,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996335944] [2021-06-05 04:04:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:07,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:07,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996335944] [2021-06-05 04:04:07,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996335944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:07,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104912781] [2021-06-05 04:04:07,421 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 04:04:07,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:04:07,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:07,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:07,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:07,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104912781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:07,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:07,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-06-05 04:04:07,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062656137] [2021-06-05 04:04:07,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:07,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:07,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:07,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:07,484 INFO L87 Difference]: Start difference. First operand 1929 states and 5835 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 04:04:07,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:07,600 INFO L93 Difference]: Finished difference Result 2077 states and 6079 transitions. [2021-06-05 04:04:07,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:07,600 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 18 [2021-06-05 04:04:07,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:07,602 INFO L225 Difference]: With dead ends: 2077 [2021-06-05 04:04:07,602 INFO L226 Difference]: Without dead ends: 2077 [2021-06-05 04:04:07,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:04:07,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2021-06-05 04:04:07,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1931. [2021-06-05 04:04:07,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 3.0264248704663212) internal successors, (5841), 1930 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5841 transitions. [2021-06-05 04:04:07,624 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5841 transitions. Word has length 18 [2021-06-05 04:04:07,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:07,625 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5841 transitions. [2021-06-05 04:04:07,625 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 04:04:07,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5841 transitions. [2021-06-05 04:04:07,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:07,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:07,627 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:07,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-05 04:04:07,827 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:07,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:07,828 INFO L82 PathProgramCache]: Analyzing trace with hash -605886236, now seen corresponding path program 84 times [2021-06-05 04:04:07,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:07,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071694885] [2021-06-05 04:04:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:07,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:07,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071694885] [2021-06-05 04:04:07,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071694885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:07,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676923551] [2021-06-05 04:04:07,894 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 04:04:07,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:04:07,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:07,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:07,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:07,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676923551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:07,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:07,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-06-05 04:04:07,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581494553] [2021-06-05 04:04:07,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:07,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:07,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:07,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:07,980 INFO L87 Difference]: Start difference. First operand 1931 states and 5841 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 04:04:08,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:08,121 INFO L93 Difference]: Finished difference Result 2122 states and 6197 transitions. [2021-06-05 04:04:08,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:04:08,121 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 18 [2021-06-05 04:04:08,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:08,123 INFO L225 Difference]: With dead ends: 2122 [2021-06-05 04:04:08,123 INFO L226 Difference]: Without dead ends: 2122 [2021-06-05 04:04:08,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:08,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-06-05 04:04:08,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1939. [2021-06-05 04:04:08,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.026315789473684) internal successors, (5865), 1938 states have internal predecessors, (5865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5865 transitions. [2021-06-05 04:04:08,143 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5865 transitions. Word has length 18 [2021-06-05 04:04:08,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:08,144 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 5865 transitions. [2021-06-05 04:04:08,144 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 04:04:08,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5865 transitions. [2021-06-05 04:04:08,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:08,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:08,146 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:08,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:08,346 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:08,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:08,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1628221258, now seen corresponding path program 85 times [2021-06-05 04:04:08,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:08,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158837772] [2021-06-05 04:04:08,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:08,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:08,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158837772] [2021-06-05 04:04:08,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158837772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:08,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295704619] [2021-06-05 04:04:08,404 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 04:04:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:08,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:08,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:08,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295704619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:08,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:08,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-06-05 04:04:08,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651140282] [2021-06-05 04:04:08,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:08,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:08,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:08,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:08,473 INFO L87 Difference]: Start difference. First operand 1939 states and 5865 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 04:04:08,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:08,604 INFO L93 Difference]: Finished difference Result 2505 states and 7377 transitions. [2021-06-05 04:04:08,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:08,605 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 18 [2021-06-05 04:04:08,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:08,607 INFO L225 Difference]: With dead ends: 2505 [2021-06-05 04:04:08,607 INFO L226 Difference]: Without dead ends: 2505 [2021-06-05 04:04:08,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:08,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-06-05 04:04:08,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2323. [2021-06-05 04:04:08,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 2322 states have (on average 3.0353143841515933) internal successors, (7048), 2322 states have internal predecessors, (7048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 7048 transitions. [2021-06-05 04:04:08,633 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 7048 transitions. Word has length 18 [2021-06-05 04:04:08,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:08,633 INFO L482 AbstractCegarLoop]: Abstraction has 2323 states and 7048 transitions. [2021-06-05 04:04:08,633 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 04:04:08,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 7048 transitions. [2021-06-05 04:04:08,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:08,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:08,635 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:08,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:08,836 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:08,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:08,836 INFO L82 PathProgramCache]: Analyzing trace with hash -2128890460, now seen corresponding path program 86 times [2021-06-05 04:04:08,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:08,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649669158] [2021-06-05 04:04:08,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:08,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:08,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649669158] [2021-06-05 04:04:08,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649669158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:08,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341893053] [2021-06-05 04:04:08,899 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 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 04:04:08,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:08,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:08,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:08,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:08,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341893053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:08,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:08,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-06-05 04:04:08,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490749370] [2021-06-05 04:04:08,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:08,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:08,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:08,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:08,979 INFO L87 Difference]: Start difference. First operand 2323 states and 7048 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 04:04:09,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:09,157 INFO L93 Difference]: Finished difference Result 2489 states and 7427 transitions. [2021-06-05 04:04:09,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:04:09,158 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 18 [2021-06-05 04:04:09,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:09,162 INFO L225 Difference]: With dead ends: 2489 [2021-06-05 04:04:09,162 INFO L226 Difference]: Without dead ends: 2489 [2021-06-05 04:04:09,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:04:09,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2021-06-05 04:04:09,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 2409. [2021-06-05 04:04:09,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 3.034468438538206) internal successors, (7307), 2408 states have internal predecessors, (7307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 7307 transitions. [2021-06-05 04:04:09,190 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 7307 transitions. Word has length 18 [2021-06-05 04:04:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:09,190 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 7307 transitions. [2021-06-05 04:04:09,190 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 04:04:09,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 7307 transitions. [2021-06-05 04:04:09,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:09,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:09,192 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:09,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:09,393 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:09,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:09,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1659730570, now seen corresponding path program 87 times [2021-06-05 04:04:09,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:09,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587547185] [2021-06-05 04:04:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:09,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:09,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587547185] [2021-06-05 04:04:09,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587547185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:09,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968594209] [2021-06-05 04:04:09,454 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 04:04:09,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:04:09,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:09,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:09,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:09,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968594209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:09,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:09,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 04:04:09,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370729784] [2021-06-05 04:04:09,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:09,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:09,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:09,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:09,531 INFO L87 Difference]: Start difference. First operand 2409 states and 7307 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 04:04:09,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:09,723 INFO L93 Difference]: Finished difference Result 2555 states and 7581 transitions. [2021-06-05 04:04:09,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:04:09,724 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 18 [2021-06-05 04:04:09,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:09,726 INFO L225 Difference]: With dead ends: 2555 [2021-06-05 04:04:09,726 INFO L226 Difference]: Without dead ends: 2555 [2021-06-05 04:04:09,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:04:09,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-06-05 04:04:09,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2408. [2021-06-05 04:04:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 3.0344827586206895) internal successors, (7304), 2407 states have internal predecessors, (7304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 7304 transitions. [2021-06-05 04:04:09,752 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 7304 transitions. Word has length 18 [2021-06-05 04:04:09,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:09,752 INFO L482 AbstractCegarLoop]: Abstraction has 2408 states and 7304 transitions. [2021-06-05 04:04:09,752 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 04:04:09,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 7304 transitions. [2021-06-05 04:04:09,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:09,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:09,754 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:09,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:09,955 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:09,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:09,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1152101788, now seen corresponding path program 88 times [2021-06-05 04:04:09,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:09,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78645581] [2021-06-05 04:04:09,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:10,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:10,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78645581] [2021-06-05 04:04:10,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78645581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:10,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363843019] [2021-06-05 04:04:10,017 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 04:04:10,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:10,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:10,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:10,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:10,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363843019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:10,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:10,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 04:04:10,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976807706] [2021-06-05 04:04:10,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:10,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:10,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:10,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:10,090 INFO L87 Difference]: Start difference. First operand 2408 states and 7304 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 04:04:10,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:10,290 INFO L93 Difference]: Finished difference Result 2601 states and 7724 transitions. [2021-06-05 04:04:10,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:10,290 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 18 [2021-06-05 04:04:10,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:10,295 INFO L225 Difference]: With dead ends: 2601 [2021-06-05 04:04:10,295 INFO L226 Difference]: Without dead ends: 2601 [2021-06-05 04:04:10,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:04:10,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-05 04:04:10,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2436. [2021-06-05 04:04:10,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 2435 states have (on average 3.0340862422997947) internal successors, (7388), 2435 states have internal predecessors, (7388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 7388 transitions. [2021-06-05 04:04:10,318 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 7388 transitions. Word has length 18 [2021-06-05 04:04:10,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:10,319 INFO L482 AbstractCegarLoop]: Abstraction has 2436 states and 7388 transitions. [2021-06-05 04:04:10,319 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 04:04:10,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 7388 transitions. [2021-06-05 04:04:10,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:10,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:10,321 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:10,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:10,521 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:10,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:10,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1875408330, now seen corresponding path program 89 times [2021-06-05 04:04:10,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:10,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52644862] [2021-06-05 04:04:10,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:10,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:10,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52644862] [2021-06-05 04:04:10,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52644862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:10,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816296556] [2021-06-05 04:04:10,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:04:10,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:04:10,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:10,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:10,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:10,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816296556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:10,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:10,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:04:10,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66698181] [2021-06-05 04:04:10,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:04:10,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:10,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:04:10,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:10,705 INFO L87 Difference]: Start difference. First operand 2436 states and 7388 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 04:04:10,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:10,955 INFO L93 Difference]: Finished difference Result 2926 states and 8621 transitions. [2021-06-05 04:04:10,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:04:10,956 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 18 [2021-06-05 04:04:10,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:10,959 INFO L225 Difference]: With dead ends: 2926 [2021-06-05 04:04:10,959 INFO L226 Difference]: Without dead ends: 2926 [2021-06-05 04:04:10,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:04:10,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-06-05 04:04:10,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2460. [2021-06-05 04:04:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2459 states have (on average 3.0337535583570556) internal successors, (7460), 2459 states have internal predecessors, (7460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 7460 transitions. [2021-06-05 04:04:10,989 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 7460 transitions. Word has length 18 [2021-06-05 04:04:10,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:10,989 INFO L482 AbstractCegarLoop]: Abstraction has 2460 states and 7460 transitions. [2021-06-05 04:04:10,989 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 04:04:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 7460 transitions. [2021-06-05 04:04:10,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:10,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:10,991 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:11,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 04:04:11,192 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:11,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:11,192 INFO L82 PathProgramCache]: Analyzing trace with hash -892568151, now seen corresponding path program 90 times [2021-06-05 04:04:11,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:11,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416352594] [2021-06-05 04:04:11,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:11,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:11,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416352594] [2021-06-05 04:04:11,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416352594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:11,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20155660] [2021-06-05 04:04:11,272 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 04:04:11,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:04:11,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:11,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:11,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:11,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20155660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:11,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:11,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-06-05 04:04:11,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791481966] [2021-06-05 04:04:11,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:04:11,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:11,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:04:11,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:11,362 INFO L87 Difference]: Start difference. First operand 2460 states and 7460 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 04:04:11,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:11,567 INFO L93 Difference]: Finished difference Result 2653 states and 7746 transitions. [2021-06-05 04:04:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:04:11,567 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 20 [2021-06-05 04:04:11,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:11,569 INFO L225 Difference]: With dead ends: 2653 [2021-06-05 04:04:11,570 INFO L226 Difference]: Without dead ends: 2647 [2021-06-05 04:04:11,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:04:11,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2647 states. [2021-06-05 04:04:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2647 to 2452. [2021-06-05 04:04:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 3.025703794369645) internal successors, (7416), 2451 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 7416 transitions. [2021-06-05 04:04:11,594 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 7416 transitions. Word has length 20 [2021-06-05 04:04:11,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:11,595 INFO L482 AbstractCegarLoop]: Abstraction has 2452 states and 7416 transitions. [2021-06-05 04:04:11,595 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 04:04:11,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 7416 transitions. [2021-06-05 04:04:11,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:11,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:11,597 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:11,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-05 04:04:11,798 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:11,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:11,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1250996055, now seen corresponding path program 91 times [2021-06-05 04:04:11,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:11,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303154085] [2021-06-05 04:04:11,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:11,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:11,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303154085] [2021-06-05 04:04:11,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303154085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:11,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028108281] [2021-06-05 04:04:11,864 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 04:04:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:11,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:11,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:11,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028108281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:11,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:11,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-06-05 04:04:11,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563387877] [2021-06-05 04:04:11,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:11,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:11,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:11,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:11,933 INFO L87 Difference]: Start difference. First operand 2452 states and 7416 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 04:04:12,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:12,054 INFO L93 Difference]: Finished difference Result 2499 states and 7508 transitions. [2021-06-05 04:04:12,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:12,055 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 04:04:12,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:12,058 INFO L225 Difference]: With dead ends: 2499 [2021-06-05 04:04:12,058 INFO L226 Difference]: Without dead ends: 2498 [2021-06-05 04:04:12,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:04:12,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-06-05 04:04:12,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2452. [2021-06-05 04:04:12,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 3.0244798041615666) internal successors, (7413), 2451 states have internal predecessors, (7413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:12,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 7413 transitions. [2021-06-05 04:04:12,091 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 7413 transitions. Word has length 20 [2021-06-05 04:04:12,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:12,092 INFO L482 AbstractCegarLoop]: Abstraction has 2452 states and 7413 transitions. [2021-06-05 04:04:12,092 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 04:04:12,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 7413 transitions. [2021-06-05 04:04:12,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:12,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:12,096 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:12,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:12,319 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:12,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:12,319 INFO L82 PathProgramCache]: Analyzing trace with hash 412854133, now seen corresponding path program 92 times [2021-06-05 04:04:12,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:12,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368894985] [2021-06-05 04:04:12,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:04:12,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:12,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368894985] [2021-06-05 04:04:12,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368894985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:12,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861781368] [2021-06-05 04:04:12,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:04:12,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:12,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:12,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:12,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:04:12,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861781368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:12,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:12,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 04:04:12,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235752032] [2021-06-05 04:04:12,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:12,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:12,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:12,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:12,445 INFO L87 Difference]: Start difference. First operand 2452 states and 7413 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 04:04:12,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:12,538 INFO L93 Difference]: Finished difference Result 2670 states and 7781 transitions. [2021-06-05 04:04:12,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:04:12,539 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 04:04:12,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:12,542 INFO L225 Difference]: With dead ends: 2670 [2021-06-05 04:04:12,542 INFO L226 Difference]: Without dead ends: 2670 [2021-06-05 04:04:12,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:04:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2021-06-05 04:04:12,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2472. [2021-06-05 04:04:12,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 3.0145690004046943) internal successors, (7449), 2471 states have internal predecessors, (7449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:12,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7449 transitions. [2021-06-05 04:04:12,578 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7449 transitions. Word has length 20 [2021-06-05 04:04:12,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:12,578 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7449 transitions. [2021-06-05 04:04:12,578 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 04:04:12,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7449 transitions. [2021-06-05 04:04:12,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:12,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:12,581 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:12,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-06-05 04:04:12,804 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:12,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:12,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1063359831, now seen corresponding path program 93 times [2021-06-05 04:04:12,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:12,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119043317] [2021-06-05 04:04:12,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:12,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:12,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119043317] [2021-06-05 04:04:12,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119043317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:12,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877136559] [2021-06-05 04:04:12,878 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 04:04:12,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:04:12,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:12,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:12,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:12,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877136559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:12,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:12,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:04:12,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742365455] [2021-06-05 04:04:12,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:12,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:12,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:12,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:12,959 INFO L87 Difference]: Start difference. First operand 2472 states and 7449 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 04:04:13,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:13,108 INFO L93 Difference]: Finished difference Result 2616 states and 7646 transitions. [2021-06-05 04:04:13,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:04:13,109 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 04:04:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:13,111 INFO L225 Difference]: With dead ends: 2616 [2021-06-05 04:04:13,111 INFO L226 Difference]: Without dead ends: 2608 [2021-06-05 04:04:13,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-06-05 04:04:13,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2441. [2021-06-05 04:04:13,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 3.018032786885246) internal successors, (7364), 2440 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:13,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 7364 transitions. [2021-06-05 04:04:13,135 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 7364 transitions. Word has length 20 [2021-06-05 04:04:13,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:13,135 INFO L482 AbstractCegarLoop]: Abstraction has 2441 states and 7364 transitions. [2021-06-05 04:04:13,135 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 04:04:13,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 7364 transitions. [2021-06-05 04:04:13,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:13,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:13,137 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:13,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:13,337 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:13,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:13,337 INFO L82 PathProgramCache]: Analyzing trace with hash -9725549, now seen corresponding path program 94 times [2021-06-05 04:04:13,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:13,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479946473] [2021-06-05 04:04:13,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:13,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:13,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:13,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479946473] [2021-06-05 04:04:13,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479946473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:13,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250495845] [2021-06-05 04:04:13,406 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 04:04:13,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:13,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:13,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:13,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:13,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250495845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:13,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:13,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 04:04:13,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600364935] [2021-06-05 04:04:13,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:13,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:13,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:13,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:13,482 INFO L87 Difference]: Start difference. First operand 2441 states and 7364 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 04:04:13,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:13,633 INFO L93 Difference]: Finished difference Result 2536 states and 7516 transitions. [2021-06-05 04:04:13,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:04:13,633 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 04:04:13,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:13,636 INFO L225 Difference]: With dead ends: 2536 [2021-06-05 04:04:13,636 INFO L226 Difference]: Without dead ends: 2531 [2021-06-05 04:04:13,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:13,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2021-06-05 04:04:13,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 2441. [2021-06-05 04:04:13,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 3.015573770491803) internal successors, (7358), 2440 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:13,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 7358 transitions. [2021-06-05 04:04:13,660 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 7358 transitions. Word has length 20 [2021-06-05 04:04:13,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:13,660 INFO L482 AbstractCegarLoop]: Abstraction has 2441 states and 7358 transitions. [2021-06-05 04:04:13,660 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 04:04:13,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 7358 transitions. [2021-06-05 04:04:13,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:13,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:13,662 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:13,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-05 04:04:13,865 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:13,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:13,865 INFO L82 PathProgramCache]: Analyzing trace with hash -856557433, now seen corresponding path program 95 times [2021-06-05 04:04:13,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:13,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926009806] [2021-06-05 04:04:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:04:13,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:13,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926009806] [2021-06-05 04:04:13,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926009806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:13,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977213737] [2021-06-05 04:04:13,913 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 04:04:13,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:04:13,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:13,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:13,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:04:14,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977213737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:14,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:14,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 04:04:14,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456722097] [2021-06-05 04:04:14,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:14,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:14,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:14,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:14,002 INFO L87 Difference]: Start difference. First operand 2441 states and 7358 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 04:04:14,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:14,076 INFO L93 Difference]: Finished difference Result 2646 states and 7683 transitions. [2021-06-05 04:04:14,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:04:14,076 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 04:04:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:14,078 INFO L225 Difference]: With dead ends: 2646 [2021-06-05 04:04:14,078 INFO L226 Difference]: Without dead ends: 2644 [2021-06-05 04:04:14,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:14,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-06-05 04:04:14,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2425. [2021-06-05 04:04:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 3.007838283828383) internal successors, (7291), 2424 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:14,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7291 transitions. [2021-06-05 04:04:14,110 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7291 transitions. Word has length 20 [2021-06-05 04:04:14,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:14,111 INFO L482 AbstractCegarLoop]: Abstraction has 2425 states and 7291 transitions. [2021-06-05 04:04:14,111 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 04:04:14,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7291 transitions. [2021-06-05 04:04:14,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:14,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:14,112 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:14,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:14,313 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:14,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:14,313 INFO L82 PathProgramCache]: Analyzing trace with hash -206051735, now seen corresponding path program 96 times [2021-06-05 04:04:14,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:14,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122897243] [2021-06-05 04:04:14,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:14,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:14,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122897243] [2021-06-05 04:04:14,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122897243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:14,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105474188] [2021-06-05 04:04:14,376 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 04:04:14,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:04:14,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:14,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:14,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:14,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105474188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:14,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:14,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-06-05 04:04:14,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777316147] [2021-06-05 04:04:14,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:14,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:14,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:14,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:14,456 INFO L87 Difference]: Start difference. First operand 2425 states and 7291 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 04:04:14,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:14,595 INFO L93 Difference]: Finished difference Result 2573 states and 7502 transitions. [2021-06-05 04:04:14,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:14,596 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 04:04:14,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:14,599 INFO L225 Difference]: With dead ends: 2573 [2021-06-05 04:04:14,599 INFO L226 Difference]: Without dead ends: 2568 [2021-06-05 04:04:14,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:04:14,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-06-05 04:04:14,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2418. [2021-06-05 04:04:14,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 3.00330988829127) internal successors, (7259), 2417 states have internal predecessors, (7259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:14,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7259 transitions. [2021-06-05 04:04:14,634 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7259 transitions. Word has length 20 [2021-06-05 04:04:14,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:14,634 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7259 transitions. [2021-06-05 04:04:14,634 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 04:04:14,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7259 transitions. [2021-06-05 04:04:14,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:14,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:14,637 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:14,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:14,860 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:14,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:14,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1279137115, now seen corresponding path program 97 times [2021-06-05 04:04:14,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:14,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839883386] [2021-06-05 04:04:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:14,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:14,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839883386] [2021-06-05 04:04:14,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839883386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:14,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451030218] [2021-06-05 04:04:14,920 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 04:04:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:14,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:14,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:14,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451030218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:14,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:14,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 04:04:14,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727651246] [2021-06-05 04:04:14,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:14,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:14,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:14,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:14,978 INFO L87 Difference]: Start difference. First operand 2418 states and 7259 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 04:04:15,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:15,106 INFO L93 Difference]: Finished difference Result 2568 states and 7475 transitions. [2021-06-05 04:04:15,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:04:15,107 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 04:04:15,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:15,109 INFO L225 Difference]: With dead ends: 2568 [2021-06-05 04:04:15,109 INFO L226 Difference]: Without dead ends: 2563 [2021-06-05 04:04:15,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:04:15,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-06-05 04:04:15,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2418. [2021-06-05 04:04:15,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.9975175837815473) internal successors, (7245), 2417 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:15,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7245 transitions. [2021-06-05 04:04:15,144 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7245 transitions. Word has length 20 [2021-06-05 04:04:15,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:15,144 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7245 transitions. [2021-06-05 04:04:15,144 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 04:04:15,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7245 transitions. [2021-06-05 04:04:15,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:15,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:15,147 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:15,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:15,361 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:15,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:15,361 INFO L82 PathProgramCache]: Analyzing trace with hash -185045527, now seen corresponding path program 98 times [2021-06-05 04:04:15,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:15,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945964283] [2021-06-05 04:04:15,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:15,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:15,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945964283] [2021-06-05 04:04:15,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945964283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:15,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263500648] [2021-06-05 04:04:15,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:04:15,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:15,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:15,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:15,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:15,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263500648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:15,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:15,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 04:04:15,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014594319] [2021-06-05 04:04:15,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:15,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:15,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:15,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:15,500 INFO L87 Difference]: Start difference. First operand 2418 states and 7245 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 04:04:15,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:15,607 INFO L93 Difference]: Finished difference Result 2556 states and 7520 transitions. [2021-06-05 04:04:15,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:15,607 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 04:04:15,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:15,610 INFO L225 Difference]: With dead ends: 2556 [2021-06-05 04:04:15,610 INFO L226 Difference]: Without dead ends: 2553 [2021-06-05 04:04:15,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:15,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-05 04:04:15,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2418. [2021-06-05 04:04:15,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.99669011170873) internal successors, (7243), 2417 states have internal predecessors, (7243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:15,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7243 transitions. [2021-06-05 04:04:15,637 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7243 transitions. Word has length 20 [2021-06-05 04:04:15,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:15,637 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7243 transitions. [2021-06-05 04:04:15,637 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 04:04:15,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7243 transitions. [2021-06-05 04:04:15,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:15,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:15,639 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:15,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-06-05 04:04:15,840 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:15,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:15,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1553610315, now seen corresponding path program 99 times [2021-06-05 04:04:15,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:15,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260340650] [2021-06-05 04:04:15,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:04:15,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:15,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260340650] [2021-06-05 04:04:15,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260340650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:15,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892549868] [2021-06-05 04:04:15,880 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 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 04:04:15,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:04:15,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:15,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:15,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:15,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892549868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:15,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:15,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:15,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543841596] [2021-06-05 04:04:15,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:15,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:15,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:15,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:15,947 INFO L87 Difference]: Start difference. First operand 2418 states and 7243 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 04:04:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:15,999 INFO L93 Difference]: Finished difference Result 2583 states and 7523 transitions. [2021-06-05 04:04:15,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:04:15,999 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 20 [2021-06-05 04:04:15,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:16,001 INFO L225 Difference]: With dead ends: 2583 [2021-06-05 04:04:16,002 INFO L226 Difference]: Without dead ends: 2581 [2021-06-05 04:04:16,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:16,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2021-06-05 04:04:16,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 2419. [2021-06-05 04:04:16,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2418 states have (on average 2.9971050454921424) internal successors, (7247), 2418 states have internal predecessors, (7247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:16,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 7247 transitions. [2021-06-05 04:04:16,027 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 7247 transitions. Word has length 20 [2021-06-05 04:04:16,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:16,027 INFO L482 AbstractCegarLoop]: Abstraction has 2419 states and 7247 transitions. [2021-06-05 04:04:16,027 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 04:04:16,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 7247 transitions. [2021-06-05 04:04:16,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:16,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:16,029 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:16,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-06-05 04:04:16,229 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:16,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:16,230 INFO L82 PathProgramCache]: Analyzing trace with hash 191844375, now seen corresponding path program 100 times [2021-06-05 04:04:16,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:16,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106704880] [2021-06-05 04:04:16,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:16,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:16,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106704880] [2021-06-05 04:04:16,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106704880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:16,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302174482] [2021-06-05 04:04:16,277 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 04:04:16,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:16,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:16,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:16,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:16,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302174482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:16,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:16,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 04:04:16,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027567268] [2021-06-05 04:04:16,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:16,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:16,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:16,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:16,356 INFO L87 Difference]: Start difference. First operand 2419 states and 7247 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 04:04:16,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:16,424 INFO L93 Difference]: Finished difference Result 2556 states and 7442 transitions. [2021-06-05 04:04:16,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:04:16,424 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 04:04:16,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:16,426 INFO L225 Difference]: With dead ends: 2556 [2021-06-05 04:04:16,426 INFO L226 Difference]: Without dead ends: 2556 [2021-06-05 04:04:16,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:16,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-06-05 04:04:16,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2398. [2021-06-05 04:04:16,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 2.994993742177722) internal successors, (7179), 2397 states have internal predecessors, (7179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:16,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 7179 transitions. [2021-06-05 04:04:16,460 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 7179 transitions. Word has length 20 [2021-06-05 04:04:16,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:16,460 INFO L482 AbstractCegarLoop]: Abstraction has 2398 states and 7179 transitions. [2021-06-05 04:04:16,461 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 04:04:16,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 7179 transitions. [2021-06-05 04:04:16,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:16,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:16,463 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:16,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-06-05 04:04:16,679 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:16,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:16,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1902457683, now seen corresponding path program 101 times [2021-06-05 04:04:16,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:16,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619260075] [2021-06-05 04:04:16,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:16,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:16,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:16,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619260075] [2021-06-05 04:04:16,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619260075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:16,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579302278] [2021-06-05 04:04:16,728 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 04:04:16,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:04:16,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:16,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:16,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:04:16,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579302278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:16,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:16,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-06-05 04:04:16,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020995594] [2021-06-05 04:04:16,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:16,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:16,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:16,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:16,805 INFO L87 Difference]: Start difference. First operand 2398 states and 7179 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 04:04:16,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:16,866 INFO L93 Difference]: Finished difference Result 2533 states and 7366 transitions. [2021-06-05 04:04:16,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:04:16,867 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 04:04:16,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:16,869 INFO L225 Difference]: With dead ends: 2533 [2021-06-05 04:04:16,869 INFO L226 Difference]: Without dead ends: 2533 [2021-06-05 04:04:16,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:16,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-06-05 04:04:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2394. [2021-06-05 04:04:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2394 states, 2393 states have (on average 2.990388633514417) internal successors, (7156), 2393 states have internal predecessors, (7156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 7156 transitions. [2021-06-05 04:04:16,895 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 7156 transitions. Word has length 20 [2021-06-05 04:04:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:16,895 INFO L482 AbstractCegarLoop]: Abstraction has 2394 states and 7156 transitions. [2021-06-05 04:04:16,895 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 04:04:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 7156 transitions. [2021-06-05 04:04:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:16,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:16,897 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:17,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 04:04:17,098 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:17,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:17,098 INFO L82 PathProgramCache]: Analyzing trace with hash -903104617, now seen corresponding path program 102 times [2021-06-05 04:04:17,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:17,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711951298] [2021-06-05 04:04:17,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:17,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:17,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711951298] [2021-06-05 04:04:17,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711951298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:17,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119391042] [2021-06-05 04:04:17,160 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 04:04:17,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:04:17,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:17,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:17,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:04:17,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119391042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:17,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:17,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-06-05 04:04:17,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473724132] [2021-06-05 04:04:17,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:17,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:17,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:17,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:17,215 INFO L87 Difference]: Start difference. First operand 2394 states and 7156 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 04:04:17,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:17,318 INFO L93 Difference]: Finished difference Result 2537 states and 7365 transitions. [2021-06-05 04:04:17,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:17,319 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 04:04:17,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:17,321 INFO L225 Difference]: With dead ends: 2537 [2021-06-05 04:04:17,321 INFO L226 Difference]: Without dead ends: 2534 [2021-06-05 04:04:17,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:04:17,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-06-05 04:04:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2390. [2021-06-05 04:04:17,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.9824194223524487) internal successors, (7125), 2389 states have internal predecessors, (7125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7125 transitions. [2021-06-05 04:04:17,344 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7125 transitions. Word has length 20 [2021-06-05 04:04:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:17,344 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7125 transitions. [2021-06-05 04:04:17,344 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 04:04:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7125 transitions. [2021-06-05 04:04:17,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:17,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:17,346 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:17,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable467 [2021-06-05 04:04:17,546 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:17,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:17,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1976189997, now seen corresponding path program 103 times [2021-06-05 04:04:17,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:17,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949835843] [2021-06-05 04:04:17,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:17,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:17,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949835843] [2021-06-05 04:04:17,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949835843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:17,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220554415] [2021-06-05 04:04:17,617 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 04:04:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:17,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:17,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:17,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220554415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:17,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:17,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-06-05 04:04:17,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300263554] [2021-06-05 04:04:17,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:17,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:17,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:17,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:17,689 INFO L87 Difference]: Start difference. First operand 2390 states and 7125 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 04:04:17,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:17,830 INFO L93 Difference]: Finished difference Result 2538 states and 7340 transitions. [2021-06-05 04:04:17,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:17,831 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 04:04:17,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:17,834 INFO L225 Difference]: With dead ends: 2538 [2021-06-05 04:04:17,834 INFO L226 Difference]: Without dead ends: 2533 [2021-06-05 04:04:17,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-06-05 04:04:17,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2390. [2021-06-05 04:04:17,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.973629133528673) internal successors, (7104), 2389 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7104 transitions. [2021-06-05 04:04:17,878 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7104 transitions. Word has length 20 [2021-06-05 04:04:17,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:17,879 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7104 transitions. [2021-06-05 04:04:17,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:17,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7104 transitions. [2021-06-05 04:04:17,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:17,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:17,880 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:18,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 04:04:18,081 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:18,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:18,081 INFO L82 PathProgramCache]: Analyzing trace with hash -882098409, now seen corresponding path program 104 times [2021-06-05 04:04:18,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:18,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696434445] [2021-06-05 04:04:18,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:18,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:18,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696434445] [2021-06-05 04:04:18,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696434445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:18,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716804116] [2021-06-05 04:04:18,153 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 04:04:18,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:18,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:18,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:18,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:18,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716804116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:18,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:18,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-06-05 04:04:18,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910672427] [2021-06-05 04:04:18,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:18,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:18,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:18,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:18,209 INFO L87 Difference]: Start difference. First operand 2390 states and 7104 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 04:04:18,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:18,343 INFO L93 Difference]: Finished difference Result 2545 states and 7407 transitions. [2021-06-05 04:04:18,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:18,343 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 04:04:18,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:18,346 INFO L225 Difference]: With dead ends: 2545 [2021-06-05 04:04:18,346 INFO L226 Difference]: Without dead ends: 2542 [2021-06-05 04:04:18,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:18,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-06-05 04:04:18,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2390. [2021-06-05 04:04:18,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.9732105483465885) internal successors, (7103), 2389 states have internal predecessors, (7103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7103 transitions. [2021-06-05 04:04:18,376 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7103 transitions. Word has length 20 [2021-06-05 04:04:18,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:18,376 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7103 transitions. [2021-06-05 04:04:18,376 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 04:04:18,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7103 transitions. [2021-06-05 04:04:18,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:18,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:18,379 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:18,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 04:04:18,579 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:18,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:18,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1324997549, now seen corresponding path program 105 times [2021-06-05 04:04:18,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:18,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545437510] [2021-06-05 04:04:18,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:18,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:18,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545437510] [2021-06-05 04:04:18,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545437510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:18,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874793137] [2021-06-05 04:04:18,647 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 04:04:18,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:04:18,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:18,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:18,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:18,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874793137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:18,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:18,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:04:18,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87903293] [2021-06-05 04:04:18,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:18,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:18,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:18,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:18,709 INFO L87 Difference]: Start difference. First operand 2390 states and 7103 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 04:04:18,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:18,865 INFO L93 Difference]: Finished difference Result 2536 states and 7394 transitions. [2021-06-05 04:04:18,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:04:18,865 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 04:04:18,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:18,868 INFO L225 Difference]: With dead ends: 2536 [2021-06-05 04:04:18,868 INFO L226 Difference]: Without dead ends: 2532 [2021-06-05 04:04:18,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:18,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-06-05 04:04:18,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2390. [2021-06-05 04:04:18,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.972791963164504) internal successors, (7102), 2389 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:18,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7102 transitions. [2021-06-05 04:04:18,895 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7102 transitions. Word has length 20 [2021-06-05 04:04:18,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:18,895 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7102 transitions. [2021-06-05 04:04:18,895 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 04:04:18,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7102 transitions. [2021-06-05 04:04:18,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:18,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:18,897 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:19,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:19,098 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:19,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:19,098 INFO L82 PathProgramCache]: Analyzing trace with hash 774024681, now seen corresponding path program 106 times [2021-06-05 04:04:19,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:19,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222973179] [2021-06-05 04:04:19,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:19,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:19,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222973179] [2021-06-05 04:04:19,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222973179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:19,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768677418] [2021-06-05 04:04:19,156 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 04:04:19,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:19,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:19,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:19,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:04:19,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768677418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:19,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:19,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:04:19,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623430771] [2021-06-05 04:04:19,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:19,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:19,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:19,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:19,239 INFO L87 Difference]: Start difference. First operand 2390 states and 7102 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 04:04:19,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:19,355 INFO L93 Difference]: Finished difference Result 2507 states and 7304 transitions. [2021-06-05 04:04:19,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:04:19,355 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 20 [2021-06-05 04:04:19,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:19,359 INFO L225 Difference]: With dead ends: 2507 [2021-06-05 04:04:19,359 INFO L226 Difference]: Without dead ends: 2507 [2021-06-05 04:04:19,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:04:19,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-06-05 04:04:19,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2391. [2021-06-05 04:04:19,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.9728033472803346) internal successors, (7105), 2390 states have internal predecessors, (7105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7105 transitions. [2021-06-05 04:04:19,396 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7105 transitions. Word has length 20 [2021-06-05 04:04:19,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:19,396 INFO L482 AbstractCegarLoop]: Abstraction has 2391 states and 7105 transitions. [2021-06-05 04:04:19,396 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 04:04:19,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7105 transitions. [2021-06-05 04:04:19,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:19,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:19,399 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:19,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:19,613 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:19,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:19,613 INFO L82 PathProgramCache]: Analyzing trace with hash 888022761, now seen corresponding path program 107 times [2021-06-05 04:04:19,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:19,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445160992] [2021-06-05 04:04:19,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:19,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:19,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445160992] [2021-06-05 04:04:19,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445160992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:19,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176327878] [2021-06-05 04:04:19,673 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 04:04:19,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:04:19,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:19,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:19,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:19,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176327878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:19,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:19,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:04:19,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318623860] [2021-06-05 04:04:19,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:19,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:19,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:19,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:19,742 INFO L87 Difference]: Start difference. First operand 2391 states and 7105 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 04:04:19,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:19,841 INFO L93 Difference]: Finished difference Result 2530 states and 7380 transitions. [2021-06-05 04:04:19,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:04:19,841 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 20 [2021-06-05 04:04:19,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:19,843 INFO L225 Difference]: With dead ends: 2530 [2021-06-05 04:04:19,843 INFO L226 Difference]: Without dead ends: 2527 [2021-06-05 04:04:19,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:04:19,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-06-05 04:04:19,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 2391. [2021-06-05 04:04:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.971548117154812) internal successors, (7102), 2390 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:19,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7102 transitions. [2021-06-05 04:04:19,870 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7102 transitions. Word has length 20 [2021-06-05 04:04:19,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:19,870 INFO L482 AbstractCegarLoop]: Abstraction has 2391 states and 7102 transitions. [2021-06-05 04:04:19,870 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 04:04:19,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7102 transitions. [2021-06-05 04:04:19,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:19,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:19,873 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:20,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:20,077 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:20,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:20,077 INFO L82 PathProgramCache]: Analyzing trace with hash -379434417, now seen corresponding path program 108 times [2021-06-05 04:04:20,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:20,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281287200] [2021-06-05 04:04:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:20,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:20,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281287200] [2021-06-05 04:04:20,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281287200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:20,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657484182] [2021-06-05 04:04:20,147 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 04:04:20,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:04:20,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:20,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:20,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:20,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657484182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:20,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:20,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-06-05 04:04:20,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831411013] [2021-06-05 04:04:20,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:20,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:20,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:20,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:20,214 INFO L87 Difference]: Start difference. First operand 2391 states and 7102 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 04:04:20,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:20,325 INFO L93 Difference]: Finished difference Result 2601 states and 7491 transitions. [2021-06-05 04:04:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:20,325 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 04:04:20,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:20,327 INFO L225 Difference]: With dead ends: 2601 [2021-06-05 04:04:20,327 INFO L226 Difference]: Without dead ends: 2598 [2021-06-05 04:04:20,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:20,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-06-05 04:04:20,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2391. [2021-06-05 04:04:20,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.9673640167364015) internal successors, (7092), 2390 states have internal predecessors, (7092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7092 transitions. [2021-06-05 04:04:20,350 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7092 transitions. Word has length 20 [2021-06-05 04:04:20,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:20,350 INFO L482 AbstractCegarLoop]: Abstraction has 2391 states and 7092 transitions. [2021-06-05 04:04:20,350 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 04:04:20,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7092 transitions. [2021-06-05 04:04:20,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:20,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:20,352 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:20,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:20,553 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:20,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:20,553 INFO L82 PathProgramCache]: Analyzing trace with hash -822333557, now seen corresponding path program 109 times [2021-06-05 04:04:20,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:20,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286179428] [2021-06-05 04:04:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:20,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:20,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286179428] [2021-06-05 04:04:20,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286179428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:20,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98685586] [2021-06-05 04:04:20,629 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 04:04:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:20,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:20,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:20,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98685586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:20,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:20,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-06-05 04:04:20,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188750598] [2021-06-05 04:04:20,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:20,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:20,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:20,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:20,720 INFO L87 Difference]: Start difference. First operand 2391 states and 7092 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 04:04:20,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:20,848 INFO L93 Difference]: Finished difference Result 2612 states and 7532 transitions. [2021-06-05 04:04:20,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:20,849 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 04:04:20,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:20,852 INFO L225 Difference]: With dead ends: 2612 [2021-06-05 04:04:20,852 INFO L226 Difference]: Without dead ends: 2604 [2021-06-05 04:04:20,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:04:20,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-06-05 04:04:20,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2396. [2021-06-05 04:04:20,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 2.9649269311064717) internal successors, (7101), 2395 states have internal predecessors, (7101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:20,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 7101 transitions. [2021-06-05 04:04:20,878 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 7101 transitions. Word has length 20 [2021-06-05 04:04:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:20,879 INFO L482 AbstractCegarLoop]: Abstraction has 2396 states and 7101 transitions. [2021-06-05 04:04:20,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:20,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 7101 transitions. [2021-06-05 04:04:20,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:20,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:20,881 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:21,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-05 04:04:21,081 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:21,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:21,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1687413177, now seen corresponding path program 110 times [2021-06-05 04:04:21,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:21,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971251386] [2021-06-05 04:04:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:21,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:21,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971251386] [2021-06-05 04:04:21,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971251386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:21,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537645806] [2021-06-05 04:04:21,124 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 04:04:21,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:21,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:21,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:21,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:21,187 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:04:21,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537645806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:21,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:21,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 04:04:21,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439840442] [2021-06-05 04:04:21,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:21,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:21,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:21,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:21,188 INFO L87 Difference]: Start difference. First operand 2396 states and 7101 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 04:04:21,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:21,258 INFO L93 Difference]: Finished difference Result 2604 states and 7451 transitions. [2021-06-05 04:04:21,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:04:21,259 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 04:04:21,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:21,261 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 04:04:21,261 INFO L226 Difference]: Without dead ends: 2604 [2021-06-05 04:04:21,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:21,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-06-05 04:04:21,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2417. [2021-06-05 04:04:21,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9639900662251657) internal successors, (7161), 2416 states have internal predecessors, (7161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7161 transitions. [2021-06-05 04:04:21,290 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7161 transitions. Word has length 20 [2021-06-05 04:04:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:21,290 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7161 transitions. [2021-06-05 04:04:21,290 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 04:04:21,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7161 transitions. [2021-06-05 04:04:21,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:21,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:21,293 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:21,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-05 04:04:21,509 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:21,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:21,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1036907479, now seen corresponding path program 111 times [2021-06-05 04:04:21,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:21,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307717824] [2021-06-05 04:04:21,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:21,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:21,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307717824] [2021-06-05 04:04:21,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307717824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:21,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519761378] [2021-06-05 04:04:21,570 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 04:04:21,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:04:21,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:21,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:21,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:21,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519761378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:21,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:21,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:04:21,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524015547] [2021-06-05 04:04:21,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:21,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:21,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:21,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:21,636 INFO L87 Difference]: Start difference. First operand 2417 states and 7161 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 04:04:21,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:21,757 INFO L93 Difference]: Finished difference Result 2566 states and 7378 transitions. [2021-06-05 04:04:21,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:21,757 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 04:04:21,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:21,760 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 04:04:21,760 INFO L226 Difference]: Without dead ends: 2563 [2021-06-05 04:04:21,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:04:21,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-06-05 04:04:21,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2417. [2021-06-05 04:04:21,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9598509933774833) internal successors, (7151), 2416 states have internal predecessors, (7151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7151 transitions. [2021-06-05 04:04:21,809 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7151 transitions. Word has length 20 [2021-06-05 04:04:21,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:21,809 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7151 transitions. [2021-06-05 04:04:21,809 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 04:04:21,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7151 transitions. [2021-06-05 04:04:21,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:21,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:21,811 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:22,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-05 04:04:22,012 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:22,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:22,012 INFO L82 PathProgramCache]: Analyzing trace with hash -2109992859, now seen corresponding path program 112 times [2021-06-05 04:04:22,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:22,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145152032] [2021-06-05 04:04:22,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:22,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:22,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145152032] [2021-06-05 04:04:22,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145152032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:22,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195081258] [2021-06-05 04:04:22,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:04:22,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:22,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:22,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:22,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:04:22,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195081258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:22,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:22,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 04:04:22,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944002297] [2021-06-05 04:04:22,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:22,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:22,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:22,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:22,147 INFO L87 Difference]: Start difference. First operand 2417 states and 7151 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 04:04:22,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:22,266 INFO L93 Difference]: Finished difference Result 2572 states and 7375 transitions. [2021-06-05 04:04:22,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:22,266 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 04:04:22,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:22,268 INFO L225 Difference]: With dead ends: 2572 [2021-06-05 04:04:22,268 INFO L226 Difference]: Without dead ends: 2567 [2021-06-05 04:04:22,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:22,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-06-05 04:04:22,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2417. [2021-06-05 04:04:22,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9536423841059603) internal successors, (7136), 2416 states have internal predecessors, (7136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:22,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7136 transitions. [2021-06-05 04:04:22,291 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7136 transitions. Word has length 20 [2021-06-05 04:04:22,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:22,291 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7136 transitions. [2021-06-05 04:04:22,291 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 04:04:22,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7136 transitions. [2021-06-05 04:04:22,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:22,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:22,293 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:22,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 04:04:22,493 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:22,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:22,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1015901271, now seen corresponding path program 113 times [2021-06-05 04:04:22,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:22,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347549064] [2021-06-05 04:04:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:22,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:22,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347549064] [2021-06-05 04:04:22,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347549064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:22,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252909901] [2021-06-05 04:04:22,554 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 04:04:22,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:04:22,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:22,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:22,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:22,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252909901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:22,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:22,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:04:22,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430549522] [2021-06-05 04:04:22,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:22,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:22,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:22,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:22,617 INFO L87 Difference]: Start difference. First operand 2417 states and 7136 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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 04:04:22,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:22,755 INFO L93 Difference]: Finished difference Result 2577 states and 7366 transitions. [2021-06-05 04:04:22,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:04:22,756 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-06-05 04:04:22,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:22,758 INFO L225 Difference]: With dead ends: 2577 [2021-06-05 04:04:22,758 INFO L226 Difference]: Without dead ends: 2571 [2021-06-05 04:04:22,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:22,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-06-05 04:04:22,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2418. [2021-06-05 04:04:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.945800579230451) internal successors, (7120), 2417 states have internal predecessors, (7120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:22,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7120 transitions. [2021-06-05 04:04:22,781 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7120 transitions. Word has length 20 [2021-06-05 04:04:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:22,781 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7120 transitions. [2021-06-05 04:04:22,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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 04:04:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7120 transitions. [2021-06-05 04:04:22,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:22,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:22,783 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:22,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:22,995 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:22,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:22,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1458800411, now seen corresponding path program 114 times [2021-06-05 04:04:22,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:22,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802912326] [2021-06-05 04:04:22,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:23,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:23,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802912326] [2021-06-05 04:04:23,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802912326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:23,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734790917] [2021-06-05 04:04:23,062 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 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 04:04:23,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:04:23,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:23,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:23,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:23,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734790917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:23,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:23,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 04:04:23,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356018070] [2021-06-05 04:04:23,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:23,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:23,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:23,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:23,147 INFO L87 Difference]: Start difference. First operand 2418 states and 7120 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 04:04:23,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:23,303 INFO L93 Difference]: Finished difference Result 2689 states and 7651 transitions. [2021-06-05 04:04:23,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:04:23,303 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 04:04:23,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:23,306 INFO L225 Difference]: With dead ends: 2689 [2021-06-05 04:04:23,306 INFO L226 Difference]: Without dead ends: 2681 [2021-06-05 04:04:23,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:04:23,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2021-06-05 04:04:23,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2420. [2021-06-05 04:04:23,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2419 states have (on average 2.9450186027284) internal successors, (7124), 2419 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:23,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 7124 transitions. [2021-06-05 04:04:23,340 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 7124 transitions. Word has length 20 [2021-06-05 04:04:23,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:23,340 INFO L482 AbstractCegarLoop]: Abstraction has 2420 states and 7124 transitions. [2021-06-05 04:04:23,340 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 04:04:23,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 7124 transitions. [2021-06-05 04:04:23,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:23,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:23,343 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:23,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-06-05 04:04:23,567 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:23,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:23,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1991195433, now seen corresponding path program 115 times [2021-06-05 04:04:23,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:23,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729243555] [2021-06-05 04:04:23,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:23,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:23,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729243555] [2021-06-05 04:04:23,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729243555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:23,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661493481] [2021-06-05 04:04:23,643 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 04:04:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:23,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:23,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:23,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661493481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:23,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:23,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 04:04:23,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121637075] [2021-06-05 04:04:23,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:23,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:23,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:23,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:23,723 INFO L87 Difference]: Start difference. First operand 2420 states and 7124 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 04:04:23,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:23,861 INFO L93 Difference]: Finished difference Result 2675 states and 7629 transitions. [2021-06-05 04:04:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:23,862 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 04:04:23,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:23,864 INFO L225 Difference]: With dead ends: 2675 [2021-06-05 04:04:23,865 INFO L226 Difference]: Without dead ends: 2660 [2021-06-05 04:04:23,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:04:23,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-06-05 04:04:23,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2425. [2021-06-05 04:04:23,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 2.942656765676568) internal successors, (7133), 2424 states have internal predecessors, (7133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7133 transitions. [2021-06-05 04:04:23,890 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7133 transitions. Word has length 20 [2021-06-05 04:04:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:23,890 INFO L482 AbstractCegarLoop]: Abstraction has 2425 states and 7133 transitions. [2021-06-05 04:04:23,890 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 04:04:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7133 transitions. [2021-06-05 04:04:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:23,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:23,892 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:24,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:24,093 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:24,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:24,093 INFO L82 PathProgramCache]: Analyzing trace with hash -823260751, now seen corresponding path program 116 times [2021-06-05 04:04:24,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:24,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288045193] [2021-06-05 04:04:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:24,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:24,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288045193] [2021-06-05 04:04:24,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288045193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:24,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541399286] [2021-06-05 04:04:24,143 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 04:04:24,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:24,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:24,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:24,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:24,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541399286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:24,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:24,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:04:24,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694016960] [2021-06-05 04:04:24,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:24,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:24,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:24,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:24,222 INFO L87 Difference]: Start difference. First operand 2425 states and 7133 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 04:04:24,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:24,309 INFO L93 Difference]: Finished difference Result 2669 states and 7579 transitions. [2021-06-05 04:04:24,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:04:24,310 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 20 [2021-06-05 04:04:24,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:24,312 INFO L225 Difference]: With dead ends: 2669 [2021-06-05 04:04:24,312 INFO L226 Difference]: Without dead ends: 2669 [2021-06-05 04:04:24,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:24,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2021-06-05 04:04:24,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 2472. [2021-06-05 04:04:24,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9405099150141645) internal successors, (7266), 2471 states have internal predecessors, (7266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:24,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7266 transitions. [2021-06-05 04:04:24,337 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7266 transitions. Word has length 20 [2021-06-05 04:04:24,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:24,337 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7266 transitions. [2021-06-05 04:04:24,337 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 04:04:24,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7266 transitions. [2021-06-05 04:04:24,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:24,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:24,339 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:24,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:24,541 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:24,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:24,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1875348307, now seen corresponding path program 117 times [2021-06-05 04:04:24,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:24,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089659201] [2021-06-05 04:04:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:24,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:24,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089659201] [2021-06-05 04:04:24,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089659201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:24,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60030350] [2021-06-05 04:04:24,610 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 04:04:24,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:04:24,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:24,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:24,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:24,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60030350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:24,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:24,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:04:24,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633184050] [2021-06-05 04:04:24,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:24,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:24,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:24,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:24,702 INFO L87 Difference]: Start difference. First operand 2472 states and 7266 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 04:04:24,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:24,810 INFO L93 Difference]: Finished difference Result 2639 states and 7604 transitions. [2021-06-05 04:04:24,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:04:24,811 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 04:04:24,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:24,814 INFO L225 Difference]: With dead ends: 2639 [2021-06-05 04:04:24,814 INFO L226 Difference]: Without dead ends: 2635 [2021-06-05 04:04:24,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:24,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-06-05 04:04:24,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2472. [2021-06-05 04:04:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9384864427357344) internal successors, (7261), 2471 states have internal predecessors, (7261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:24,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7261 transitions. [2021-06-05 04:04:24,841 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7261 transitions. Word has length 20 [2021-06-05 04:04:24,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:24,841 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7261 transitions. [2021-06-05 04:04:24,841 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 04:04:24,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7261 transitions. [2021-06-05 04:04:24,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:24,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:24,843 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:25,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable482 [2021-06-05 04:04:25,044 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:25,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:25,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1238881453, now seen corresponding path program 118 times [2021-06-05 04:04:25,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:25,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724883833] [2021-06-05 04:04:25,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:25,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:25,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724883833] [2021-06-05 04:04:25,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724883833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:25,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685916992] [2021-06-05 04:04:25,116 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 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 04:04:25,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:25,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:25,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:25,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:25,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685916992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:25,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:25,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 04:04:25,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971546915] [2021-06-05 04:04:25,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:25,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:25,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:25,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:25,184 INFO L87 Difference]: Start difference. First operand 2472 states and 7261 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 04:04:25,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:25,316 INFO L93 Difference]: Finished difference Result 2718 states and 7731 transitions. [2021-06-05 04:04:25,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:25,316 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 04:04:25,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:25,319 INFO L225 Difference]: With dead ends: 2718 [2021-06-05 04:04:25,319 INFO L226 Difference]: Without dead ends: 2714 [2021-06-05 04:04:25,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:25,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-06-05 04:04:25,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2472. [2021-06-05 04:04:25,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9348441926345608) internal successors, (7252), 2471 states have internal predecessors, (7252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:25,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7252 transitions. [2021-06-05 04:04:25,342 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7252 transitions. Word has length 20 [2021-06-05 04:04:25,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:25,342 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7252 transitions. [2021-06-05 04:04:25,342 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 04:04:25,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7252 transitions. [2021-06-05 04:04:25,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:25,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:25,344 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:25,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:25,544 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:25,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:25,545 INFO L82 PathProgramCache]: Analyzing trace with hash 393910001, now seen corresponding path program 119 times [2021-06-05 04:04:25,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:25,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078908280] [2021-06-05 04:04:25,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:25,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:25,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078908280] [2021-06-05 04:04:25,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078908280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:25,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789940554] [2021-06-05 04:04:25,613 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 04:04:25,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:04:25,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:25,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:25,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:25,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789940554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:25,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:25,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 04:04:25,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284177946] [2021-06-05 04:04:25,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:25,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:25,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:25,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:25,676 INFO L87 Difference]: Start difference. First operand 2472 states and 7252 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 04:04:25,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:25,806 INFO L93 Difference]: Finished difference Result 2775 states and 7866 transitions. [2021-06-05 04:04:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:25,806 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 04:04:25,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:25,809 INFO L225 Difference]: With dead ends: 2775 [2021-06-05 04:04:25,809 INFO L226 Difference]: Without dead ends: 2760 [2021-06-05 04:04:25,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:04:25,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-06-05 04:04:25,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2486. [2021-06-05 04:04:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 2.9287726358148896) internal successors, (7278), 2485 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 7278 transitions. [2021-06-05 04:04:25,833 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 7278 transitions. Word has length 20 [2021-06-05 04:04:25,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:25,833 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 7278 transitions. [2021-06-05 04:04:25,833 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 04:04:25,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 7278 transitions. [2021-06-05 04:04:25,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:25,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:25,835 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:26,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:26,036 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:26,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:26,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1540334603, now seen corresponding path program 120 times [2021-06-05 04:04:26,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:26,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742607244] [2021-06-05 04:04:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:26,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:26,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742607244] [2021-06-05 04:04:26,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742607244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:26,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956040735] [2021-06-05 04:04:26,083 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 04:04:26,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:04:26,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:26,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:26,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:04:26,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956040735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:26,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:26,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-06-05 04:04:26,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761162102] [2021-06-05 04:04:26,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:26,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:26,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:26,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:26,157 INFO L87 Difference]: Start difference. First operand 2486 states and 7278 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 04:04:26,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:26,233 INFO L93 Difference]: Finished difference Result 2905 states and 8228 transitions. [2021-06-05 04:04:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:04:26,233 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 04:04:26,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:26,235 INFO L225 Difference]: With dead ends: 2905 [2021-06-05 04:04:26,236 INFO L226 Difference]: Without dead ends: 2905 [2021-06-05 04:04:26,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:26,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2021-06-05 04:04:26,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2666. [2021-06-05 04:04:26,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.9448405253283303) internal successors, (7848), 2665 states have internal predecessors, (7848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:26,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7848 transitions. [2021-06-05 04:04:26,261 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7848 transitions. Word has length 20 [2021-06-05 04:04:26,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:26,261 INFO L482 AbstractCegarLoop]: Abstraction has 2666 states and 7848 transitions. [2021-06-05 04:04:26,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 04:04:26,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7848 transitions. [2021-06-05 04:04:26,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:26,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:26,263 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:26,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-05 04:04:26,464 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:26,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:26,464 INFO L82 PathProgramCache]: Analyzing trace with hash -889828905, now seen corresponding path program 121 times [2021-06-05 04:04:26,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:26,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105378160] [2021-06-05 04:04:26,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:26,516 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:26,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:26,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105378160] [2021-06-05 04:04:26,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105378160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:26,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620862690] [2021-06-05 04:04:26,516 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 04:04:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:26,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:26,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:26,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620862690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:26,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:26,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-06-05 04:04:26,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468203170] [2021-06-05 04:04:26,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:26,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:26,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:26,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:26,577 INFO L87 Difference]: Start difference. First operand 2666 states and 7848 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 04:04:26,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:26,695 INFO L93 Difference]: Finished difference Result 2846 states and 8143 transitions. [2021-06-05 04:04:26,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:26,695 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 04:04:26,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:26,698 INFO L225 Difference]: With dead ends: 2846 [2021-06-05 04:04:26,698 INFO L226 Difference]: Without dead ends: 2845 [2021-06-05 04:04:26,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:04:26,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2021-06-05 04:04:26,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2666. [2021-06-05 04:04:26,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.94296435272045) internal successors, (7843), 2665 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:26,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7843 transitions. [2021-06-05 04:04:26,725 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7843 transitions. Word has length 20 [2021-06-05 04:04:26,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:26,725 INFO L482 AbstractCegarLoop]: Abstraction has 2666 states and 7843 transitions. [2021-06-05 04:04:26,725 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 04:04:26,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7843 transitions. [2021-06-05 04:04:26,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:26,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:26,727 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:26,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable486,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:26,927 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:26,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1962914285, now seen corresponding path program 122 times [2021-06-05 04:04:26,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:26,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119891205] [2021-06-05 04:04:26,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:26,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:26,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119891205] [2021-06-05 04:04:26,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119891205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:26,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443572359] [2021-06-05 04:04:26,983 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 04:04:27,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:27,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:27,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:27,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:27,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443572359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:27,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:27,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 04:04:27,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595069698] [2021-06-05 04:04:27,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:27,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:27,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:27,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:27,048 INFO L87 Difference]: Start difference. First operand 2666 states and 7843 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 04:04:27,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:27,171 INFO L93 Difference]: Finished difference Result 2854 states and 8145 transitions. [2021-06-05 04:04:27,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:27,172 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 04:04:27,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:27,174 INFO L225 Difference]: With dead ends: 2854 [2021-06-05 04:04:27,174 INFO L226 Difference]: Without dead ends: 2849 [2021-06-05 04:04:27,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:27,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2021-06-05 04:04:27,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2687. [2021-06-05 04:04:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.9389426656738644) internal successors, (7894), 2686 states have internal predecessors, (7894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7894 transitions. [2021-06-05 04:04:27,199 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7894 transitions. Word has length 20 [2021-06-05 04:04:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:27,200 INFO L482 AbstractCegarLoop]: Abstraction has 2687 states and 7894 transitions. [2021-06-05 04:04:27,200 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 04:04:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7894 transitions. [2021-06-05 04:04:27,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:27,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:27,202 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:27,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-06-05 04:04:27,421 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:27,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:27,421 INFO L82 PathProgramCache]: Analyzing trace with hash -868822697, now seen corresponding path program 123 times [2021-06-05 04:04:27,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:27,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364897843] [2021-06-05 04:04:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:27,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:27,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364897843] [2021-06-05 04:04:27,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364897843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:27,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516216538] [2021-06-05 04:04:27,479 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 04:04:27,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:04:27,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:27,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:27,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:04:27,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516216538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:27,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:27,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 04:04:27,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909593829] [2021-06-05 04:04:27,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:27,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:27,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:27,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:27,566 INFO L87 Difference]: Start difference. First operand 2687 states and 7894 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 04:04:27,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:27,679 INFO L93 Difference]: Finished difference Result 3212 states and 8981 transitions. [2021-06-05 04:04:27,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:04:27,679 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 04:04:27,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:27,682 INFO L225 Difference]: With dead ends: 3212 [2021-06-05 04:04:27,682 INFO L226 Difference]: Without dead ends: 3209 [2021-06-05 04:04:27,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:04:27,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2021-06-05 04:04:27,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2687. [2021-06-05 04:04:27,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.937453462397617) internal successors, (7890), 2686 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7890 transitions. [2021-06-05 04:04:27,708 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7890 transitions. Word has length 20 [2021-06-05 04:04:27,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:27,708 INFO L482 AbstractCegarLoop]: Abstraction has 2687 states and 7890 transitions. [2021-06-05 04:04:27,708 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 04:04:27,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7890 transitions. [2021-06-05 04:04:27,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:27,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:27,710 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:27,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-05 04:04:27,911 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:27,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:27,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1311721837, now seen corresponding path program 124 times [2021-06-05 04:04:27,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:27,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163323528] [2021-06-05 04:04:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:27,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:27,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163323528] [2021-06-05 04:04:27,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163323528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:27,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111150385] [2021-06-05 04:04:27,981 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 04:04:28,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:28,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:28,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:28,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:28,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111150385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:28,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:28,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 04:04:28,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851800330] [2021-06-05 04:04:28,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:28,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:28,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:28,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:28,046 INFO L87 Difference]: Start difference. First operand 2687 states and 7890 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 04:04:28,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:28,173 INFO L93 Difference]: Finished difference Result 3217 states and 8981 transitions. [2021-06-05 04:04:28,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:04:28,173 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 04:04:28,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:28,177 INFO L225 Difference]: With dead ends: 3217 [2021-06-05 04:04:28,178 INFO L226 Difference]: Without dead ends: 3209 [2021-06-05 04:04:28,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:04:28,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2021-06-05 04:04:28,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2709. [2021-06-05 04:04:28,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.9309453471196454) internal successors, (7937), 2708 states have internal predecessors, (7937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7937 transitions. [2021-06-05 04:04:28,213 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7937 transitions. Word has length 20 [2021-06-05 04:04:28,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:28,213 INFO L482 AbstractCegarLoop]: Abstraction has 2709 states and 7937 transitions. [2021-06-05 04:04:28,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:28,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7937 transitions. [2021-06-05 04:04:28,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:28,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:28,216 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:28,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 04:04:28,421 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:28,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:28,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2138274007, now seen corresponding path program 125 times [2021-06-05 04:04:28,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:28,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975294687] [2021-06-05 04:04:28,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:28,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:28,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975294687] [2021-06-05 04:04:28,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975294687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:28,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522307457] [2021-06-05 04:04:28,501 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 04:04:28,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:04:28,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:28,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:28,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:28,617 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:28,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522307457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:28,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:28,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 04:04:28,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752156364] [2021-06-05 04:04:28,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:28,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:28,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:28,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:28,618 INFO L87 Difference]: Start difference. First operand 2709 states and 7937 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 04:04:28,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:28,748 INFO L93 Difference]: Finished difference Result 3000 states and 8519 transitions. [2021-06-05 04:04:28,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:04:28,748 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 04:04:28,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:28,751 INFO L225 Difference]: With dead ends: 3000 [2021-06-05 04:04:28,751 INFO L226 Difference]: Without dead ends: 2995 [2021-06-05 04:04:28,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:04:28,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-06-05 04:04:28,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2709. [2021-06-05 04:04:28,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.930576070901034) internal successors, (7936), 2708 states have internal predecessors, (7936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7936 transitions. [2021-06-05 04:04:28,778 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7936 transitions. Word has length 20 [2021-06-05 04:04:28,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:28,778 INFO L482 AbstractCegarLoop]: Abstraction has 2709 states and 7936 transitions. [2021-06-05 04:04:28,778 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 04:04:28,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7936 transitions. [2021-06-05 04:04:28,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:28,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:28,780 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:28,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:28,981 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:28,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:28,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1713962771, now seen corresponding path program 126 times [2021-06-05 04:04:28,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:28,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103253284] [2021-06-05 04:04:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:29,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:29,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103253284] [2021-06-05 04:04:29,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103253284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:29,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763786332] [2021-06-05 04:04:29,070 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 04:04:29,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:04:29,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:29,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:29,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:29,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763786332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:29,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:29,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 04:04:29,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376143375] [2021-06-05 04:04:29,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:29,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:29,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:29,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:29,152 INFO L87 Difference]: Start difference. First operand 2709 states and 7936 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 04:04:29,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:29,258 INFO L93 Difference]: Finished difference Result 2966 states and 8462 transitions. [2021-06-05 04:04:29,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:04:29,259 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 04:04:29,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:29,261 INFO L225 Difference]: With dead ends: 2966 [2021-06-05 04:04:29,261 INFO L226 Difference]: Without dead ends: 2960 [2021-06-05 04:04:29,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:04:29,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-06-05 04:04:29,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2709. [2021-06-05 04:04:29,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.9302067946824226) internal successors, (7935), 2708 states have internal predecessors, (7935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:29,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7935 transitions. [2021-06-05 04:04:29,288 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7935 transitions. Word has length 20 [2021-06-05 04:04:29,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:29,288 INFO L482 AbstractCegarLoop]: Abstraction has 2709 states and 7935 transitions. [2021-06-05 04:04:29,288 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 04:04:29,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7935 transitions. [2021-06-05 04:04:29,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:29,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:29,290 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:29,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-06-05 04:04:29,491 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:29,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:29,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1200498409, now seen corresponding path program 127 times [2021-06-05 04:04:29,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:29,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036990732] [2021-06-05 04:04:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:29,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:29,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036990732] [2021-06-05 04:04:29,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036990732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:29,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525234055] [2021-06-05 04:04:29,569 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 04:04:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:29,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:29,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:29,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525234055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:29,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:29,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 04:04:29,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726986475] [2021-06-05 04:04:29,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:29,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:29,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:29,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:29,642 INFO L87 Difference]: Start difference. First operand 2709 states and 7935 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 04:04:29,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:29,761 INFO L93 Difference]: Finished difference Result 2994 states and 8494 transitions. [2021-06-05 04:04:29,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:04:29,762 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 04:04:29,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:29,765 INFO L225 Difference]: With dead ends: 2994 [2021-06-05 04:04:29,765 INFO L226 Difference]: Without dead ends: 2994 [2021-06-05 04:04:29,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:04:29,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2021-06-05 04:04:29,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 2744. [2021-06-05 04:04:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.930368209989063) internal successors, (8038), 2743 states have internal predecessors, (8038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 8038 transitions. [2021-06-05 04:04:29,798 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 8038 transitions. Word has length 20 [2021-06-05 04:04:29,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:29,798 INFO L482 AbstractCegarLoop]: Abstraction has 2744 states and 8038 transitions. [2021-06-05 04:04:29,798 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 04:04:29,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 8038 transitions. [2021-06-05 04:04:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:29,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:29,801 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:30,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:30,002 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:30,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:30,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1877298135, now seen corresponding path program 128 times [2021-06-05 04:04:30,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:30,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704413576] [2021-06-05 04:04:30,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:30,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:30,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704413576] [2021-06-05 04:04:30,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704413576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:30,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68739895] [2021-06-05 04:04:30,084 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 04:04:30,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:30,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:30,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:30,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:30,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68739895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:30,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:30,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-06-05 04:04:30,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068020149] [2021-06-05 04:04:30,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:04:30,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:30,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:04:30,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:30,162 INFO L87 Difference]: Start difference. First operand 2744 states and 8038 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 04:04:30,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:30,294 INFO L93 Difference]: Finished difference Result 2954 states and 8469 transitions. [2021-06-05 04:04:30,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:30,294 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 04:04:30,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:30,297 INFO L225 Difference]: With dead ends: 2954 [2021-06-05 04:04:30,297 INFO L226 Difference]: Without dead ends: 2949 [2021-06-05 04:04:30,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:04:30,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-06-05 04:04:30,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2744. [2021-06-05 04:04:30,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.9292745169522423) internal successors, (8035), 2743 states have internal predecessors, (8035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 8035 transitions. [2021-06-05 04:04:30,334 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 8035 transitions. Word has length 20 [2021-06-05 04:04:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:30,334 INFO L482 AbstractCegarLoop]: Abstraction has 2744 states and 8035 transitions. [2021-06-05 04:04:30,334 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 04:04:30,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 8035 transitions. [2021-06-05 04:04:30,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:30,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:30,336 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:30,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:30,537 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:30,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:30,537 INFO L82 PathProgramCache]: Analyzing trace with hash -132934129, now seen corresponding path program 129 times [2021-06-05 04:04:30,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:30,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828406030] [2021-06-05 04:04:30,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:30,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:30,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828406030] [2021-06-05 04:04:30,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828406030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:30,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433941462] [2021-06-05 04:04:30,618 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 04:04:30,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:04:30,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:30,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:30,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:30,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433941462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:30,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:30,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 04:04:30,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227802009] [2021-06-05 04:04:30,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:04:30,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:30,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:04:30,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:30,692 INFO L87 Difference]: Start difference. First operand 2744 states and 8035 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 04:04:30,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:30,831 INFO L93 Difference]: Finished difference Result 3147 states and 8824 transitions. [2021-06-05 04:04:30,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:30,831 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 04:04:30,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:30,834 INFO L225 Difference]: With dead ends: 3147 [2021-06-05 04:04:30,834 INFO L226 Difference]: Without dead ends: 3132 [2021-06-05 04:04:30,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:04:30,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-06-05 04:04:30,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 2748. [2021-06-05 04:04:30,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 2.9257371678194395) internal successors, (8037), 2747 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:30,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 8037 transitions. [2021-06-05 04:04:30,864 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 8037 transitions. Word has length 20 [2021-06-05 04:04:30,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:30,864 INFO L482 AbstractCegarLoop]: Abstraction has 2748 states and 8037 transitions. [2021-06-05 04:04:30,864 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 04:04:30,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 8037 transitions. [2021-06-05 04:04:30,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:30,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:30,866 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:31,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:31,067 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:31,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:31,067 INFO L82 PathProgramCache]: Analyzing trace with hash -557245365, now seen corresponding path program 130 times [2021-06-05 04:04:31,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:31,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173905503] [2021-06-05 04:04:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:31,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:31,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173905503] [2021-06-05 04:04:31,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173905503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:31,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50665021] [2021-06-05 04:04:31,139 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 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 04:04:31,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:31,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:31,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:31,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:31,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50665021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:31,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:31,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-06-05 04:04:31,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184418349] [2021-06-05 04:04:31,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:04:31,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:31,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:04:31,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:31,207 INFO L87 Difference]: Start difference. First operand 2748 states and 8037 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 04:04:31,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:31,334 INFO L93 Difference]: Finished difference Result 3023 states and 8605 transitions. [2021-06-05 04:04:31,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:31,335 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 04:04:31,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:31,338 INFO L225 Difference]: With dead ends: 3023 [2021-06-05 04:04:31,338 INFO L226 Difference]: Without dead ends: 3017 [2021-06-05 04:04:31,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:04:31,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2021-06-05 04:04:31,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2748. [2021-06-05 04:04:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 2.925373134328358) internal successors, (8036), 2747 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 8036 transitions. [2021-06-05 04:04:31,377 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 8036 transitions. Word has length 20 [2021-06-05 04:04:31,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:31,377 INFO L482 AbstractCegarLoop]: Abstraction has 2748 states and 8036 transitions. [2021-06-05 04:04:31,377 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 04:04:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 8036 transitions. [2021-06-05 04:04:31,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:31,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:31,380 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:31,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:31,585 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:31,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:31,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1275866105, now seen corresponding path program 131 times [2021-06-05 04:04:31,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:31,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756311959] [2021-06-05 04:04:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:31,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:31,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756311959] [2021-06-05 04:04:31,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756311959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:31,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624499566] [2021-06-05 04:04:31,651 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 04:04:31,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:04:31,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:31,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:31,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:31,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624499566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:31,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:31,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2021-06-05 04:04:31,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386813806] [2021-06-05 04:04:31,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:04:31,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:31,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:04:31,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:31,735 INFO L87 Difference]: Start difference. First operand 2748 states and 8036 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 04:04:31,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:31,848 INFO L93 Difference]: Finished difference Result 3263 states and 9284 transitions. [2021-06-05 04:04:31,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:04:31,849 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 04:04:31,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:31,851 INFO L225 Difference]: With dead ends: 3263 [2021-06-05 04:04:31,851 INFO L226 Difference]: Without dead ends: 3263 [2021-06-05 04:04:31,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:04:31,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2021-06-05 04:04:31,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 3010. [2021-06-05 04:04:31,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 2.9478231970754405) internal successors, (8870), 3009 states have internal predecessors, (8870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:31,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 8870 transitions. [2021-06-05 04:04:31,882 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 8870 transitions. Word has length 20 [2021-06-05 04:04:31,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:31,882 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 8870 transitions. [2021-06-05 04:04:31,882 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 04:04:31,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 8870 transitions. [2021-06-05 04:04:31,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:31,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:31,884 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:32,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 04:04:32,085 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:32,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:32,085 INFO L82 PathProgramCache]: Analyzing trace with hash -625360407, now seen corresponding path program 132 times [2021-06-05 04:04:32,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:32,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337232881] [2021-06-05 04:04:32,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:32,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:32,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337232881] [2021-06-05 04:04:32,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337232881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:32,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216957378] [2021-06-05 04:04:32,149 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 04:04:32,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:04:32,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:32,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:32,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:04:32,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216957378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:32,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:32,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 14 [2021-06-05 04:04:32,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202468622] [2021-06-05 04:04:32,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:32,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:32,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:32,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:32,220 INFO L87 Difference]: Start difference. First operand 3010 states and 8870 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 04:04:32,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:32,344 INFO L93 Difference]: Finished difference Result 3211 states and 9205 transitions. [2021-06-05 04:04:32,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:04:32,345 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:32,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:32,348 INFO L225 Difference]: With dead ends: 3211 [2021-06-05 04:04:32,348 INFO L226 Difference]: Without dead ends: 3210 [2021-06-05 04:04:32,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:32,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2021-06-05 04:04:32,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3010. [2021-06-05 04:04:32,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 2.94749086075108) internal successors, (8869), 3009 states have internal predecessors, (8869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 8869 transitions. [2021-06-05 04:04:32,383 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 8869 transitions. Word has length 20 [2021-06-05 04:04:32,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:32,383 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 8869 transitions. [2021-06-05 04:04:32,384 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 04:04:32,384 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 8869 transitions. [2021-06-05 04:04:32,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:32,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:32,387 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:32,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 04:04:32,589 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:32,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:32,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1698445787, now seen corresponding path program 133 times [2021-06-05 04:04:32,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:32,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829305995] [2021-06-05 04:04:32,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:32,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:32,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829305995] [2021-06-05 04:04:32,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829305995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:32,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015332543] [2021-06-05 04:04:32,664 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 04:04:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:32,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:32,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:32,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015332543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:32,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:32,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-06-05 04:04:32,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191556326] [2021-06-05 04:04:32,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:04:32,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:32,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:04:32,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:32,756 INFO L87 Difference]: Start difference. First operand 3010 states and 8869 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 04:04:32,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:32,895 INFO L93 Difference]: Finished difference Result 3214 states and 9207 transitions. [2021-06-05 04:04:32,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:04:32,895 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 04:04:32,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:32,898 INFO L225 Difference]: With dead ends: 3214 [2021-06-05 04:04:32,899 INFO L226 Difference]: Without dead ends: 3211 [2021-06-05 04:04:32,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:32,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-06-05 04:04:32,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 3017. [2021-06-05 04:04:32,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9462864721485413) internal successors, (8886), 3016 states have internal predecessors, (8886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:32,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8886 transitions. [2021-06-05 04:04:32,930 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8886 transitions. Word has length 20 [2021-06-05 04:04:32,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:32,930 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 8886 transitions. [2021-06-05 04:04:32,930 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 04:04:32,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8886 transitions. [2021-06-05 04:04:32,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:32,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:32,933 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:33,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 04:04:33,133 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:33,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:33,133 INFO L82 PathProgramCache]: Analyzing trace with hash -604354199, now seen corresponding path program 134 times [2021-06-05 04:04:33,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:33,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978341422] [2021-06-05 04:04:33,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:33,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:33,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978341422] [2021-06-05 04:04:33,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978341422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:33,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112381278] [2021-06-05 04:04:33,206 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 04:04:33,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:33,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:33,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:33,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:33,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112381278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:33,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:33,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-06-05 04:04:33,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524862767] [2021-06-05 04:04:33,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:04:33,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:33,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:04:33,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:33,298 INFO L87 Difference]: Start difference. First operand 3017 states and 8886 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 04:04:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:33,435 INFO L93 Difference]: Finished difference Result 3712 states and 10403 transitions. [2021-06-05 04:04:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:04:33,436 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 04:04:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:33,439 INFO L225 Difference]: With dead ends: 3712 [2021-06-05 04:04:33,439 INFO L226 Difference]: Without dead ends: 3709 [2021-06-05 04:04:33,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:33,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3709 states. [2021-06-05 04:04:33,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3709 to 3017. [2021-06-05 04:04:33,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9449602122015914) internal successors, (8882), 3016 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8882 transitions. [2021-06-05 04:04:33,479 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8882 transitions. Word has length 20 [2021-06-05 04:04:33,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:33,479 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 8882 transitions. [2021-06-05 04:04:33,479 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 04:04:33,480 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8882 transitions. [2021-06-05 04:04:33,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:33,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:33,482 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:33,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 04:04:33,683 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:33,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:33,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1047253339, now seen corresponding path program 135 times [2021-06-05 04:04:33,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:33,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477698640] [2021-06-05 04:04:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:33,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:33,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477698640] [2021-06-05 04:04:33,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477698640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:33,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169815139] [2021-06-05 04:04:33,785 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 04:04:33,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:04:33,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:33,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:33,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:04:33,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169815139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:33,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:33,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-06-05 04:04:33,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110990098] [2021-06-05 04:04:33,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:04:33,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:33,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:04:33,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:33,852 INFO L87 Difference]: Start difference. First operand 3017 states and 8882 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 04:04:33,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:33,974 INFO L93 Difference]: Finished difference Result 3583 states and 10063 transitions. [2021-06-05 04:04:33,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:33,974 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 04:04:33,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:33,977 INFO L225 Difference]: With dead ends: 3583 [2021-06-05 04:04:33,977 INFO L226 Difference]: Without dead ends: 3579 [2021-06-05 04:04:33,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:33,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3579 states. [2021-06-05 04:04:34,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3579 to 3017. [2021-06-05 04:04:34,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.944297082228117) internal successors, (8880), 3016 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:34,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8880 transitions. [2021-06-05 04:04:34,010 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8880 transitions. Word has length 20 [2021-06-05 04:04:34,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:34,010 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 8880 transitions. [2021-06-05 04:04:34,010 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 04:04:34,010 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8880 transitions. [2021-06-05 04:04:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:34,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:34,012 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:34,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:34,213 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:34,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:34,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1892224791, now seen corresponding path program 136 times [2021-06-05 04:04:34,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:34,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798705698] [2021-06-05 04:04:34,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:34,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:34,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798705698] [2021-06-05 04:04:34,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798705698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:34,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159205879] [2021-06-05 04:04:34,306 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 04:04:34,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:34,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:34,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:34,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:34,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159205879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:34,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:34,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 16 [2021-06-05 04:04:34,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804575915] [2021-06-05 04:04:34,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:04:34,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:34,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:04:34,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:04:34,399 INFO L87 Difference]: Start difference. First operand 3017 states and 8880 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 04:04:34,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:34,557 INFO L93 Difference]: Finished difference Result 3595 states and 10071 transitions. [2021-06-05 04:04:34,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:04:34,558 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 20 [2021-06-05 04:04:34,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:34,562 INFO L225 Difference]: With dead ends: 3595 [2021-06-05 04:04:34,563 INFO L226 Difference]: Without dead ends: 3580 [2021-06-05 04:04:34,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:04:34,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2021-06-05 04:04:34,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 3038. [2021-06-05 04:04:34,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.9400724399078038) internal successors, (8929), 3037 states have internal predecessors, (8929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:34,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8929 transitions. [2021-06-05 04:04:34,611 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8929 transitions. Word has length 20 [2021-06-05 04:04:34,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:34,611 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 8929 transitions. [2021-06-05 04:04:34,611 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 04:04:34,611 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8929 transitions. [2021-06-05 04:04:34,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:34,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:34,614 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:34,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-05 04:04:34,833 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:34,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:34,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1978431269, now seen corresponding path program 137 times [2021-06-05 04:04:34,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:34,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78608060] [2021-06-05 04:04:34,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:34,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:34,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78608060] [2021-06-05 04:04:34,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78608060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:34,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461742821] [2021-06-05 04:04:34,910 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 04:04:34,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:04:34,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:34,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:34,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:35,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461742821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:35,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:35,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 16 [2021-06-05 04:04:35,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242738175] [2021-06-05 04:04:35,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:04:35,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:35,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:04:35,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:04:35,008 INFO L87 Difference]: Start difference. First operand 3038 states and 8929 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 04:04:35,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:35,136 INFO L93 Difference]: Finished difference Result 3383 states and 9628 transitions. [2021-06-05 04:04:35,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:35,137 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 20 [2021-06-05 04:04:35,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:35,141 INFO L225 Difference]: With dead ends: 3383 [2021-06-05 04:04:35,141 INFO L226 Difference]: Without dead ends: 3377 [2021-06-05 04:04:35,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 156.8ms TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:04:35,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2021-06-05 04:04:35,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 3038. [2021-06-05 04:04:35,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.939743167599605) internal successors, (8928), 3037 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:35,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8928 transitions. [2021-06-05 04:04:35,179 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8928 transitions. Word has length 20 [2021-06-05 04:04:35,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:35,180 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 8928 transitions. [2021-06-05 04:04:35,180 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 04:04:35,180 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8928 transitions. [2021-06-05 04:04:35,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:35,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:35,182 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:35,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-06-05 04:04:35,383 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:35,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:35,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1709684841, now seen corresponding path program 138 times [2021-06-05 04:04:35,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:35,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134686861] [2021-06-05 04:04:35,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:35,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:35,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134686861] [2021-06-05 04:04:35,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134686861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:35,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650862483] [2021-06-05 04:04:35,495 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 04:04:35,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:04:35,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:35,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 04:04:35,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:35,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650862483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:35,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:35,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-06-05 04:04:35,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469282762] [2021-06-05 04:04:35,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:04:35,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:35,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:04:35,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:35,582 INFO L87 Difference]: Start difference. First operand 3038 states and 8928 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 04:04:35,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:35,723 INFO L93 Difference]: Finished difference Result 3346 states and 9565 transitions. [2021-06-05 04:04:35,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:35,723 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 04:04:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:35,727 INFO L225 Difference]: With dead ends: 3346 [2021-06-05 04:04:35,727 INFO L226 Difference]: Without dead ends: 3339 [2021-06-05 04:04:35,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 190.3ms TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:04:35,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-06-05 04:04:35,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3038. [2021-06-05 04:04:35,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.939413895291406) internal successors, (8927), 3037 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:35,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8927 transitions. [2021-06-05 04:04:35,764 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8927 transitions. Word has length 20 [2021-06-05 04:04:35,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:35,764 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 8927 transitions. [2021-06-05 04:04:35,764 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 04:04:35,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8927 transitions. [2021-06-05 04:04:35,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:04:35,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:35,766 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:35,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-05 04:04:35,967 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:35,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:35,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1876737230, now seen corresponding path program 139 times [2021-06-05 04:04:35,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:35,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316611509] [2021-06-05 04:04:35,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:36,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:36,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316611509] [2021-06-05 04:04:36,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316611509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:36,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226357067] [2021-06-05 04:04:36,026 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 04:04:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:36,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:04:36,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:36,381 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:04:36,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:04:36,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:04:38,052 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 298 [2021-06-05 04:04:38,179 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 298 [2021-06-05 04:04:38,346 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 303 [2021-06-05 04:04:38,605 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 389 [2021-06-05 04:04:38,748 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 302 [2021-06-05 04:04:40,031 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 244 [2021-06-05 04:04:40,204 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 252 [2021-06-05 04:04:40,424 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 294 [2021-06-05 04:04:40,619 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 294 [2021-06-05 04:04:40,818 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 297 [2021-06-05 04:04:40,949 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 234 [2021-06-05 04:04:41,699 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 150 [2021-06-05 04:04:41,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:04:41,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:04:41,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:04:41,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 04:04:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:41,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226357067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:41,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:41,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 04:04:41,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003531123] [2021-06-05 04:04:41,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:04:41,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:41,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:04:41,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:41,859 INFO L87 Difference]: Start difference. First operand 3038 states and 8927 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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 04:04:42,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:42,065 INFO L93 Difference]: Finished difference Result 3126 states and 9098 transitions. [2021-06-05 04:04:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:04:42,065 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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 04:04:42,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:42,069 INFO L225 Difference]: With dead ends: 3126 [2021-06-05 04:04:42,069 INFO L226 Difference]: Without dead ends: 3123 [2021-06-05 04:04:42,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 213.1ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:42,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-06-05 04:04:42,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 3077. [2021-06-05 04:04:42,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 2.935305591677503) internal successors, (9029), 3076 states have internal predecessors, (9029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 9029 transitions. [2021-06-05 04:04:42,105 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 9029 transitions. Word has length 21 [2021-06-05 04:04:42,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:42,105 INFO L482 AbstractCegarLoop]: Abstraction has 3077 states and 9029 transitions. [2021-06-05 04:04:42,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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 04:04:42,105 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 9029 transitions. [2021-06-05 04:04:42,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:04:42,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:42,108 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:42,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:42,308 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:42,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:42,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1748440654, now seen corresponding path program 140 times [2021-06-05 04:04:42,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:42,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729344326] [2021-06-05 04:04:42,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:42,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:42,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729344326] [2021-06-05 04:04:42,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729344326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:42,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039193711] [2021-06-05 04:04:42,375 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 04:04:42,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:42,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:42,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:04:42,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:42,780 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:04:42,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:04:42,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:04:43,474 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 245 [2021-06-05 04:04:43,601 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 245 [2021-06-05 04:04:43,724 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 255 [2021-06-05 04:04:43,855 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 268 [2021-06-05 04:04:44,131 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 340 [2021-06-05 04:04:45,030 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 284 [2021-06-05 04:04:45,211 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 304 [2021-06-05 04:04:45,524 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 323 [2021-06-05 04:04:45,793 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 323 [2021-06-05 04:04:46,059 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 332 [2021-06-05 04:04:46,546 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 351 [2021-06-05 04:04:46,750 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 214 [2021-06-05 04:04:47,310 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 268 [2021-06-05 04:04:47,786 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 264 [2021-06-05 04:04:47,931 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 264 [2021-06-05 04:04:48,086 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 269 [2021-06-05 04:04:48,223 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 277 [2021-06-05 04:04:49,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:04:49,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:04:49,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:04:49,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 04:04:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:49,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039193711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:49,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:49,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 04:04:49,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124312646] [2021-06-05 04:04:49,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:04:49,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:49,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:04:49,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:49,041 INFO L87 Difference]: Start difference. First operand 3077 states and 9029 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:04:49,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:49,273 INFO L93 Difference]: Finished difference Result 3204 states and 9307 transitions. [2021-06-05 04:04:49,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:04:49,273 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:04:49,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:49,276 INFO L225 Difference]: With dead ends: 3204 [2021-06-05 04:04:49,276 INFO L226 Difference]: Without dead ends: 3200 [2021-06-05 04:04:49,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 252.8ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:49,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3200 states. [2021-06-05 04:04:49,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3200 to 3145. [2021-06-05 04:04:49,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 3144 states have (on average 2.931933842239186) internal successors, (9218), 3144 states have internal predecessors, (9218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:49,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 9218 transitions. [2021-06-05 04:04:49,310 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 9218 transitions. Word has length 21 [2021-06-05 04:04:49,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:49,310 INFO L482 AbstractCegarLoop]: Abstraction has 3145 states and 9218 transitions. [2021-06-05 04:04:49,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:04:49,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 9218 transitions. [2021-06-05 04:04:49,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:04:49,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:49,313 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:49,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1003 [2021-06-05 04:04:49,513 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:49,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:49,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1114512810, now seen corresponding path program 141 times [2021-06-05 04:04:49,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:49,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801540863] [2021-06-05 04:04:49,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:49,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:49,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801540863] [2021-06-05 04:04:49,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801540863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:49,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259061812] [2021-06-05 04:04:49,575 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 04:04:49,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:04:49,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:49,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:04:49,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:49,960 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:04:49,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:04:49,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:04:50,761 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 243 [2021-06-05 04:04:51,106 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 320 [2021-06-05 04:04:51,296 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 293 [2021-06-05 04:04:51,404 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 243 [2021-06-05 04:04:52,290 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 217 [2021-06-05 04:04:53,039 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 355 [2021-06-05 04:04:54,195 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 244 [2021-06-05 04:04:54,557 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 793 DAG size of output: 526 [2021-06-05 04:04:55,080 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 911 DAG size of output: 620 [2021-06-05 04:04:55,677 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 1005 DAG size of output: 627 [2021-06-05 04:04:56,449 WARN L205 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 1113 DAG size of output: 731 [2021-06-05 04:04:57,216 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 1113 DAG size of output: 731 [2021-06-05 04:04:58,053 WARN L205 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 737 [2021-06-05 04:04:58,308 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 737 DAG size of output: 469 [2021-06-05 04:04:58,445 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 360 [2021-06-05 04:04:58,645 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 360 [2021-06-05 04:04:59,536 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 308 [2021-06-05 04:04:59,698 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 308 [2021-06-05 04:04:59,878 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 312 [2021-06-05 04:05:00,269 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 235 [2021-06-05 04:05:00,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:00,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:00,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:00,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 04:05:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:00,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259061812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:00,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:00,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 04:05:00,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155352848] [2021-06-05 04:05:00,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:05:00,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:00,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:05:00,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:00,654 INFO L87 Difference]: Start difference. First operand 3145 states and 9218 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:05:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:00,878 INFO L93 Difference]: Finished difference Result 3276 states and 9505 transitions. [2021-06-05 04:05:00,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:05:00,879 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:05:00,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:00,882 INFO L225 Difference]: With dead ends: 3276 [2021-06-05 04:05:00,882 INFO L226 Difference]: Without dead ends: 3272 [2021-06-05 04:05:00,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:00,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-06-05 04:05:00,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 3208. [2021-06-05 04:05:00,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 2.9307764265668848) internal successors, (9399), 3207 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:00,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 9399 transitions. [2021-06-05 04:05:00,917 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 9399 transitions. Word has length 21 [2021-06-05 04:05:00,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:00,917 INFO L482 AbstractCegarLoop]: Abstraction has 3208 states and 9399 transitions. [2021-06-05 04:05:00,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:05:00,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 9399 transitions. [2021-06-05 04:05:00,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:05:00,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:00,919 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:01,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1502 [2021-06-05 04:05:01,125 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:01,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:01,125 INFO L82 PathProgramCache]: Analyzing trace with hash -328243022, now seen corresponding path program 142 times [2021-06-05 04:05:01,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:01,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928349013] [2021-06-05 04:05:01,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:05:01,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:01,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928349013] [2021-06-05 04:05:01,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928349013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:01,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134017274] [2021-06-05 04:05:01,185 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 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 04:05:01,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:01,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:01,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:05:01,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:01,550 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:05:01,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:01,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:05:02,296 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 238 [2021-06-05 04:05:02,427 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 257 [2021-06-05 04:05:02,533 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 253 [2021-06-05 04:05:03,275 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 169 [2021-06-05 04:05:03,378 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 188 [2021-06-05 04:05:04,901 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 300 [2021-06-05 04:05:05,136 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 388 [2021-06-05 04:05:05,471 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 391 [2021-06-05 04:05:06,017 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 436 [2021-06-05 04:05:06,615 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 485 [2021-06-05 04:05:07,445 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 248 [2021-06-05 04:05:08,041 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 308 [2021-06-05 04:05:08,409 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 563 DAG size of output: 349 [2021-06-05 04:05:08,730 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 366 [2021-06-05 04:05:09,552 WARN L205 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 1245 DAG size of output: 721 [2021-06-05 04:05:10,513 WARN L205 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 1297 DAG size of output: 762 [2021-06-05 04:05:11,530 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 1297 DAG size of output: 762 [2021-06-05 04:05:12,704 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 1306 DAG size of output: 771 [2021-06-05 04:05:13,779 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 770 DAG size of output: 843 [2021-06-05 04:05:14,083 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 345 [2021-06-05 04:05:15,144 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 662 DAG size of output: 655 [2021-06-05 04:05:15,429 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 380 [2021-06-05 04:05:15,905 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 210 [2021-06-05 04:05:16,032 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 247 [2021-06-05 04:05:16,246 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 341 [2021-06-05 04:05:16,460 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 341 [2021-06-05 04:05:16,790 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 710 DAG size of output: 376 [2021-06-05 04:05:17,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:17,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:17,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:17,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 04:05:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:17,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134017274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:17,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:17,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 04:05:17,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891915630] [2021-06-05 04:05:17,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:05:17,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:17,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:05:17,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:17,466 INFO L87 Difference]: Start difference. First operand 3208 states and 9399 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:05:17,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:17,652 INFO L93 Difference]: Finished difference Result 3340 states and 9684 transitions. [2021-06-05 04:05:17,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:05:17,653 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:05:17,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:17,656 INFO L225 Difference]: With dead ends: 3340 [2021-06-05 04:05:17,656 INFO L226 Difference]: Without dead ends: 3336 [2021-06-05 04:05:17,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 216.1ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:17,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-05 04:05:17,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 3260. [2021-06-05 04:05:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 2.933722000613685) internal successors, (9561), 3259 states have internal predecessors, (9561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:17,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 9561 transitions. [2021-06-05 04:05:17,689 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 9561 transitions. Word has length 21 [2021-06-05 04:05:17,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:17,689 INFO L482 AbstractCegarLoop]: Abstraction has 3260 states and 9561 transitions. [2021-06-05 04:05:17,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:05:17,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 9561 transitions. [2021-06-05 04:05:17,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:05:17,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:17,691 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:17,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2416,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:17,893 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:17,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:17,893 INFO L82 PathProgramCache]: Analyzing trace with hash -2104000854, now seen corresponding path program 143 times [2021-06-05 04:05:17,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:17,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439954686] [2021-06-05 04:05:17,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:17,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:17,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439954686] [2021-06-05 04:05:17,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439954686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:17,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588667714] [2021-06-05 04:05:17,966 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 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 04:05:18,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:05:18,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:18,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:05:18,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:18,329 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:05:18,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:18,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:05:18,965 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 222 [2021-06-05 04:05:19,165 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 230 [2021-06-05 04:05:19,386 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 314 [2021-06-05 04:05:19,550 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 235 [2021-06-05 04:05:20,126 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 243 [2021-06-05 04:05:20,754 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 344 [2021-06-05 04:05:21,003 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 351 [2021-06-05 04:05:21,922 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 219 [2021-06-05 04:05:22,111 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 280 [2021-06-05 04:05:22,564 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 511 [2021-06-05 04:05:23,117 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 511 [2021-06-05 04:05:23,682 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 511 [2021-06-05 04:05:24,178 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 517 [2021-06-05 04:05:24,770 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 410 [2021-06-05 04:05:25,666 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 283 [2021-06-05 04:05:25,904 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 343 [2021-06-05 04:05:26,160 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 343 [2021-06-05 04:05:26,531 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 387 [2021-06-05 04:05:27,257 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 232 [2021-06-05 04:05:27,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:27,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:27,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:27,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 04:05:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:27,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588667714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:27,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:27,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 04:05:27,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630031063] [2021-06-05 04:05:27,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:05:27,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:27,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:05:27,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:27,672 INFO L87 Difference]: Start difference. First operand 3260 states and 9561 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:05:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:27,873 INFO L93 Difference]: Finished difference Result 3397 states and 9873 transitions. [2021-06-05 04:05:27,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:05:27,873 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:05:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:27,876 INFO L225 Difference]: With dead ends: 3397 [2021-06-05 04:05:27,876 INFO L226 Difference]: Without dead ends: 3392 [2021-06-05 04:05:27,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 219.4ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:27,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3392 states. [2021-06-05 04:05:27,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3392 to 3328. [2021-06-05 04:05:27,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3327 states have (on average 2.935076645626691) internal successors, (9765), 3327 states have internal predecessors, (9765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:27,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 9765 transitions. [2021-06-05 04:05:27,909 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 9765 transitions. Word has length 21 [2021-06-05 04:05:27,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:27,909 INFO L482 AbstractCegarLoop]: Abstraction has 3328 states and 9765 transitions. [2021-06-05 04:05:27,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:05:27,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 9765 transitions. [2021-06-05 04:05:27,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:05:27,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:27,912 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:28,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3337 [2021-06-05 04:05:28,117 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:28,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:28,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1317918798, now seen corresponding path program 144 times [2021-06-05 04:05:28,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:28,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787485943] [2021-06-05 04:05:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:28,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:28,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787485943] [2021-06-05 04:05:28,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787485943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:28,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817345270] [2021-06-05 04:05:28,176 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 04:05:28,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:05:28,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:28,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:05:28,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:28,540 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:05:28,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:28,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:05:29,150 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 222 [2021-06-05 04:05:29,259 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 235 [2021-06-05 04:05:29,376 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 242 [2021-06-05 04:05:29,999 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 248 [2021-06-05 04:05:30,861 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 304 [2021-06-05 04:05:31,091 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 304 [2021-06-05 04:05:31,377 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 348 [2021-06-05 04:05:32,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:32,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:32,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:32,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 04:05:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:32,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817345270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:32,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:32,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 04:05:32,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342192043] [2021-06-05 04:05:32,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:05:32,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:32,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:05:32,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:32,332 INFO L87 Difference]: Start difference. First operand 3328 states and 9765 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:05:32,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:32,578 INFO L93 Difference]: Finished difference Result 3484 states and 10127 transitions. [2021-06-05 04:05:32,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:05:32,578 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:05:32,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:32,582 INFO L225 Difference]: With dead ends: 3484 [2021-06-05 04:05:32,582 INFO L226 Difference]: Without dead ends: 3480 [2021-06-05 04:05:32,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 223.4ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:32,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-06-05 04:05:32,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3406. [2021-06-05 04:05:32,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3405 states have (on average 2.9392070484581496) internal successors, (10008), 3405 states have internal predecessors, (10008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:32,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 10008 transitions. [2021-06-05 04:05:32,617 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 10008 transitions. Word has length 21 [2021-06-05 04:05:32,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:32,617 INFO L482 AbstractCegarLoop]: Abstraction has 3406 states and 10008 transitions. [2021-06-05 04:05:32,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:05:32,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 10008 transitions. [2021-06-05 04:05:32,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:05:32,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:32,620 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:32,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3893,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:32,820 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:32,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:32,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1575788458, now seen corresponding path program 145 times [2021-06-05 04:05:32,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:32,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993293796] [2021-06-05 04:05:32,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:05:32,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:32,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993293796] [2021-06-05 04:05:32,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993293796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:32,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415911185] [2021-06-05 04:05:32,887 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 04:05:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:32,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:05:32,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:33,230 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:05:33,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:33,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:05:34,701 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 266 [2021-06-05 04:05:34,827 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 266 [2021-06-05 04:05:35,022 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 272 [2021-06-05 04:05:35,179 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 236 [2021-06-05 04:05:35,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:35,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:35,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:35,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 04:05:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:35,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415911185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:35,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:35,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 04:05:35,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224456667] [2021-06-05 04:05:35,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:05:35,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:35,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:05:35,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:35,852 INFO L87 Difference]: Start difference. First operand 3406 states and 10008 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:05:36,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:36,076 INFO L93 Difference]: Finished difference Result 3580 states and 10428 transitions. [2021-06-05 04:05:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:05:36,076 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:05:36,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:36,081 INFO L225 Difference]: With dead ends: 3580 [2021-06-05 04:05:36,081 INFO L226 Difference]: Without dead ends: 3576 [2021-06-05 04:05:36,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:36,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3576 states. [2021-06-05 04:05:36,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3576 to 3502. [2021-06-05 04:05:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3502 states, 3501 states have (on average 2.9460154241645244) internal successors, (10314), 3501 states have internal predecessors, (10314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:36,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3502 states to 3502 states and 10314 transitions. [2021-06-05 04:05:36,125 INFO L78 Accepts]: Start accepts. Automaton has 3502 states and 10314 transitions. Word has length 21 [2021-06-05 04:05:36,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:36,126 INFO L482 AbstractCegarLoop]: Abstraction has 3502 states and 10314 transitions. [2021-06-05 04:05:36,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:05:36,126 INFO L276 IsEmpty]: Start isEmpty. Operand 3502 states and 10314 transitions. [2021-06-05 04:05:36,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:05:36,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:36,130 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:36,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4195 [2021-06-05 04:05:36,331 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:36,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:36,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1086400178, now seen corresponding path program 146 times [2021-06-05 04:05:36,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:36,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120170905] [2021-06-05 04:05:36,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:36,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:36,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120170905] [2021-06-05 04:05:36,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120170905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:36,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941333657] [2021-06-05 04:05:36,391 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 04:05:36,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:36,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:36,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:05:36,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:36,757 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:05:36,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:36,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:05:38,094 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 235 [2021-06-05 04:05:38,968 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 328 [2021-06-05 04:05:39,169 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 328 [2021-06-05 04:05:39,412 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 334 [2021-06-05 04:05:39,570 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 378 [2021-06-05 04:05:40,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:40,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:40,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:40,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 04:05:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:40,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941333657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:40,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:40,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 04:05:40,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697220810] [2021-06-05 04:05:40,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:05:40,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:40,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:05:40,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:40,317 INFO L87 Difference]: Start difference. First operand 3502 states and 10314 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:05:40,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:40,625 INFO L93 Difference]: Finished difference Result 3937 states and 11542 transitions. [2021-06-05 04:05:40,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:05:40,626 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:05:40,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:40,630 INFO L225 Difference]: With dead ends: 3937 [2021-06-05 04:05:40,630 INFO L226 Difference]: Without dead ends: 3934 [2021-06-05 04:05:40,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3934 states. [2021-06-05 04:05:40,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3934 to 3870. [2021-06-05 04:05:40,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 2.9581287154303437) internal successors, (11445), 3869 states have internal predecessors, (11445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 11445 transitions. [2021-06-05 04:05:40,690 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 11445 transitions. Word has length 21 [2021-06-05 04:05:40,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:40,691 INFO L482 AbstractCegarLoop]: Abstraction has 3870 states and 11445 transitions. [2021-06-05 04:05:40,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:05:40,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 11445 transitions. [2021-06-05 04:05:40,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:05:40,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:40,694 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:40,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4581,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:40,894 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:40,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:40,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1199734614, now seen corresponding path program 147 times [2021-06-05 04:05:40,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:40,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538883898] [2021-06-05 04:05:40,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:40,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:40,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538883898] [2021-06-05 04:05:40,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538883898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:40,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441317660] [2021-06-05 04:05:40,957 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 04:05:40,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:05:40,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:40,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:05:40,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:41,315 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:05:41,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:41,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:05:41,954 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 284 [2021-06-05 04:05:42,095 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 295 [2021-06-05 04:05:42,253 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 295 [2021-06-05 04:05:42,453 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 308 [2021-06-05 04:05:42,726 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 371 [2021-06-05 04:05:42,845 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 286 [2021-06-05 04:05:43,043 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 343 [2021-06-05 04:05:43,183 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 296 [2021-06-05 04:05:43,309 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 209 [2021-06-05 04:05:44,478 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 300 [2021-06-05 04:05:44,605 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 227 [2021-06-05 04:05:46,644 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 236 [2021-06-05 04:05:46,880 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 342 [2021-06-05 04:05:47,290 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 494 [2021-06-05 04:05:47,940 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 863 DAG size of output: 728 [2021-06-05 04:05:48,104 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 338 [2021-06-05 04:05:48,345 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 347 [2021-06-05 04:05:48,943 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 247 [2021-06-05 04:05:49,073 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 309 [2021-06-05 04:05:49,576 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 290 [2021-06-05 04:05:50,212 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 249 [2021-06-05 04:05:50,505 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 449 [2021-06-05 04:05:51,002 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 695 DAG size of output: 568 [2021-06-05 04:05:51,792 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 263 [2021-06-05 04:05:52,531 WARN L205 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 944 DAG size of output: 763 [2021-06-05 04:05:52,705 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 273 [2021-06-05 04:05:54,010 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 274 [2021-06-05 04:05:54,251 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 376 [2021-06-05 04:05:55,009 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 495 [2021-06-05 04:05:56,334 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 1457 DAG size of output: 1160 [2021-06-05 04:05:58,600 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 2117 DAG size of output: 1722 [2021-06-05 04:06:01,106 WARN L205 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 2126 DAG size of output: 1700 [2021-06-05 04:06:03,755 WARN L205 SmtUtils]: Spent 2.64 s on a formula simplification. DAG size of input: 2297 DAG size of output: 1855 [2021-06-05 04:06:06,766 WARN L205 SmtUtils]: Spent 3.00 s on a formula simplification. DAG size of input: 2314 DAG size of output: 1868 [2021-06-05 04:06:10,301 WARN L205 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 2404 DAG size of output: 1926 [2021-06-05 04:06:13,782 WARN L205 SmtUtils]: Spent 3.47 s on a formula simplification. DAG size of input: 2404 DAG size of output: 1926 [2021-06-05 04:06:17,571 WARN L205 SmtUtils]: Spent 3.78 s on a formula simplification. DAG size of input: 2413 DAG size of output: 1935 [2021-06-05 04:06:22,372 WARN L205 SmtUtils]: Spent 4.79 s on a formula simplification. DAG size of input: 1937 DAG size of output: 1926 [2021-06-05 04:06:22,532 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 1913 [2021-06-05 04:06:22,733 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 292 [2021-06-05 04:06:22,873 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 247 [2021-06-05 04:06:22,981 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 272 [2021-06-05 04:06:24,297 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 224 [2021-06-05 04:06:25,554 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 271 [2021-06-05 04:06:25,815 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 707 DAG size of output: 324 [2021-06-05 04:06:26,580 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 898 DAG size of output: 474 [2021-06-05 04:06:29,134 WARN L205 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 1831 DAG size of output: 1691 [2021-06-05 04:06:30,576 WARN L205 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 1672 DAG size of output: 1637 [2021-06-05 04:06:30,771 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 1484 DAG size of output: 1484 [2021-06-05 04:06:31,952 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 428 [2021-06-05 04:06:32,311 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 471 [2021-06-05 04:06:33,229 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 322 [2021-06-05 04:06:33,347 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 322 [2021-06-05 04:06:33,656 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 935 [2021-06-05 04:06:34,462 WARN L205 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 562 [2021-06-05 04:06:34,863 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 370 [2021-06-05 04:06:35,250 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 325 [2021-06-05 04:06:35,376 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 216 [2021-06-05 04:06:35,885 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 302 [2021-06-05 04:06:36,066 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 302 [2021-06-05 04:06:36,315 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 177 [2021-06-05 04:06:37,150 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 892 DAG size of output: 457 [2021-06-05 04:06:37,646 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 1452 DAG size of output: 748 [2021-06-05 04:06:37,866 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 269 [2021-06-05 04:06:38,407 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 225 [2021-06-05 04:06:38,549 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 238 [2021-06-05 04:06:39,223 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 265 [2021-06-05 04:06:39,399 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 489 DAG size of output: 297 [2021-06-05 04:06:40,229 WARN L205 SmtUtils]: Spent 827.00 ms on a formula simplification. DAG size of input: 1854 DAG size of output: 987 [2021-06-05 04:06:41,412 WARN L205 SmtUtils]: Spent 998.00 ms on a formula simplification. DAG size of input: 1941 DAG size of output: 1041 [2021-06-05 04:06:42,983 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 2661 DAG size of output: 1346 [2021-06-05 04:06:44,821 WARN L205 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 2691 DAG size of output: 1375 [2021-06-05 04:06:46,619 WARN L205 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 2691 DAG size of output: 1375 [2021-06-05 04:06:48,544 WARN L205 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 2695 DAG size of output: 1379 [2021-06-05 04:06:50,552 WARN L205 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 1381 DAG size of output: 1259 [2021-06-05 04:06:51,587 WARN L205 SmtUtils]: Spent 973.00 ms on a formula simplification. DAG size of input: 913 DAG size of output: 759 [2021-06-05 04:06:52,357 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 234 [2021-06-05 04:06:52,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:06:52,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:06:52,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:06:52,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 04:06:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:52,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441317660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:52,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:52,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 04:06:52,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769711861] [2021-06-05 04:06:52,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:06:52,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:52,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:06:52,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:06:52,739 INFO L87 Difference]: Start difference. First operand 3870 states and 11445 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:06:52,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:52,962 INFO L93 Difference]: Finished difference Result 4316 states and 12694 transitions. [2021-06-05 04:06:52,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:06:52,963 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:06:52,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:52,968 INFO L225 Difference]: With dead ends: 4316 [2021-06-05 04:06:52,968 INFO L226 Difference]: Without dead ends: 4313 [2021-06-05 04:06:52,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:06:52,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4313 states. [2021-06-05 04:06:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4313 to 4248. [2021-06-05 04:06:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4248 states, 4247 states have (on average 2.9684483164586766) internal successors, (12607), 4247 states have internal predecessors, (12607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:53,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 12607 transitions. [2021-06-05 04:06:53,022 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 12607 transitions. Word has length 21 [2021-06-05 04:06:53,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:53,022 INFO L482 AbstractCegarLoop]: Abstraction has 4248 states and 12607 transitions. [2021-06-05 04:06:53,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:06:53,022 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 12607 transitions. [2021-06-05 04:06:53,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:06:53,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:53,026 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:53,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5056 [2021-06-05 04:06:53,227 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:53,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:53,227 INFO L82 PathProgramCache]: Analyzing trace with hash 944530866, now seen corresponding path program 148 times [2021-06-05 04:06:53,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:53,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790774409] [2021-06-05 04:06:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:53,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:53,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790774409] [2021-06-05 04:06:53,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790774409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:53,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082641822] [2021-06-05 04:06:53,288 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 04:06:53,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:53,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:53,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:06:53,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:53,635 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 04:06:53,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:06:53,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 04:06:55,173 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 304 [2021-06-05 04:06:55,314 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 325 [2021-06-05 04:06:55,588 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 466 [2021-06-05 04:06:55,883 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 466 [2021-06-05 04:06:56,210 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 660 DAG size of output: 479 [2021-06-05 04:06:56,679 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 581 [2021-06-05 04:06:57,469 WARN L205 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 648 [2021-06-05 04:06:57,866 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 467 [2021-06-05 04:06:58,133 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 303 [2021-06-05 04:06:58,775 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 257 [2021-06-05 04:06:58,963 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 329 [2021-06-05 04:07:00,062 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 173 [2021-06-05 04:07:00,562 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 269 [2021-06-05 04:07:00,913 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 464 [2021-06-05 04:07:01,494 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 701 DAG size of output: 644 [2021-06-05 04:07:01,930 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 547 [2021-06-05 04:07:03,008 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 231 [2021-06-05 04:07:03,165 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 232 [2021-06-05 04:07:03,734 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 275 [2021-06-05 04:07:03,937 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 190 [2021-06-05 04:07:04,581 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 262 [2021-06-05 04:07:04,909 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 348 [2021-06-05 04:07:05,569 WARN L205 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 832 DAG size of output: 571 [2021-06-05 04:07:06,315 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 224 [2021-06-05 04:07:07,252 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 357 [2021-06-05 04:07:08,411 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 1093 DAG size of output: 799 [2021-06-05 04:07:10,020 WARN L205 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 1557 DAG size of output: 1132 [2021-06-05 04:07:10,359 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 453 [2021-06-05 04:07:10,926 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 540 [2021-06-05 04:07:11,497 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 200 [2021-06-05 04:07:11,623 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 216 [2021-06-05 04:07:12,978 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 298 [2021-06-05 04:07:13,229 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 390 [2021-06-05 04:07:14,159 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 598 [2021-06-05 04:07:14,893 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 243 [2021-06-05 04:07:15,043 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 265 [2021-06-05 04:07:15,196 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 288 [2021-06-05 04:07:15,604 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 233 [2021-06-05 04:07:16,123 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 272 [2021-06-05 04:07:16,236 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 275 [2021-06-05 04:07:16,425 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 350 [2021-06-05 04:07:16,727 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 447 [2021-06-05 04:07:16,929 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 240 [2021-06-05 04:07:17,455 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 271 [2021-06-05 04:07:17,937 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 727 DAG size of output: 614 [2021-06-05 04:07:18,568 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 238 [2021-06-05 04:07:19,386 WARN L205 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 1122 DAG size of output: 910 [2021-06-05 04:07:21,023 WARN L205 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 1515 DAG size of output: 1270 [2021-06-05 04:07:23,111 WARN L205 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 1698 DAG size of output: 1431 [2021-06-05 04:07:27,228 WARN L205 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 2765 DAG size of output: 2211 [2021-06-05 04:07:31,320 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 2765 DAG size of output: 2211 [2021-06-05 04:07:35,732 WARN L205 SmtUtils]: Spent 4.40 s on a formula simplification. DAG size of input: 2771 DAG size of output: 2217 [2021-06-05 04:07:36,499 WARN L205 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 2217 DAG size of output: 1860 [2021-06-05 04:07:39,039 WARN L205 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 1349 DAG size of output: 1709 [2021-06-05 04:07:39,291 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 424 [2021-06-05 04:07:39,480 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 280 [2021-06-05 04:07:39,890 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 258 [2021-06-05 04:07:40,316 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 251 [2021-06-05 04:07:40,502 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 263 [2021-06-05 04:07:40,918 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 1145 DAG size of output: 624 [2021-06-05 04:07:41,826 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 580 [2021-06-05 04:07:42,296 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 253 [2021-06-05 04:07:42,720 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 289 [2021-06-05 04:07:42,912 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 371 [2021-06-05 04:07:43,224 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 762 DAG size of output: 476 [2021-06-05 04:07:43,701 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 1117 DAG size of output: 562 [2021-06-05 04:07:44,149 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 491 [2021-06-05 04:07:44,296 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 313 [2021-06-05 04:07:45,425 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 304 [2021-06-05 04:07:45,775 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 461 [2021-06-05 04:07:45,959 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 329 [2021-06-05 04:07:46,940 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 511 DAG size of output: 310 [2021-06-05 04:07:47,297 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 944 DAG size of output: 496 [2021-06-05 04:07:48,284 WARN L205 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 1840 DAG size of output: 923 [2021-06-05 04:07:49,239 WARN L205 SmtUtils]: Spent 947.00 ms on a formula simplification. DAG size of input: 1840 DAG size of output: 923 [2021-06-05 04:07:50,308 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 1845 DAG size of output: 928 [2021-06-05 04:07:51,484 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 930 DAG size of output: 1088 [2021-06-05 04:07:51,800 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 261 [2021-06-05 04:07:52,546 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 232 [2021-06-05 04:07:52,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:07:52,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:07:52,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:07:52,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 04:07:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:52,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082641822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:52,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:52,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 04:07:52,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446392942] [2021-06-05 04:07:52,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:07:52,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:52,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:07:52,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:07:52,846 INFO L87 Difference]: Start difference. First operand 4248 states and 12607 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:07:53,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:53,097 INFO L93 Difference]: Finished difference Result 4620 states and 13625 transitions. [2021-06-05 04:07:53,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:07:53,097 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:07:53,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:53,102 INFO L225 Difference]: With dead ends: 4620 [2021-06-05 04:07:53,102 INFO L226 Difference]: Without dead ends: 4617 [2021-06-05 04:07:53,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:07:53,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2021-06-05 04:07:53,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 4548. [2021-06-05 04:07:53,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4548 states, 4547 states have (on average 2.9762480756542775) internal successors, (13533), 4547 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:53,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4548 states to 4548 states and 13533 transitions. [2021-06-05 04:07:53,155 INFO L78 Accepts]: Start accepts. Automaton has 4548 states and 13533 transitions. Word has length 21 [2021-06-05 04:07:53,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:53,156 INFO L482 AbstractCegarLoop]: Abstraction has 4548 states and 13533 transitions. [2021-06-05 04:07:53,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 04:07:53,156 INFO L276 IsEmpty]: Start isEmpty. Operand 4548 states and 13533 transitions. [2021-06-05 04:07:53,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:07:53,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:53,160 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:53,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7776 [2021-06-05 04:07:53,361 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:53,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:53,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1973759689, now seen corresponding path program 149 times [2021-06-05 04:07:53,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:53,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909424570] [2021-06-05 04:07:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:53,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:53,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909424570] [2021-06-05 04:07:53,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909424570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:53,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232901833] [2021-06-05 04:07:53,445 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 04:07:53,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:07:53,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:53,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:53,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:53,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232901833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:53,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:53,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:07:53,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675243803] [2021-06-05 04:07:53,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:07:53,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:53,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:07:53,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:07:53,512 INFO L87 Difference]: Start difference. First operand 4548 states and 13533 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 04:07:53,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:53,787 INFO L93 Difference]: Finished difference Result 4872 states and 14053 transitions. [2021-06-05 04:07:53,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:07:53,787 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 04:07:53,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:53,792 INFO L225 Difference]: With dead ends: 4872 [2021-06-05 04:07:53,792 INFO L226 Difference]: Without dead ends: 4863 [2021-06-05 04:07:53,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=423, Invalid=837, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:07:53,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4863 states. [2021-06-05 04:07:53,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4863 to 4581. [2021-06-05 04:07:53,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 4580 states have (on average 2.9753275109170305) internal successors, (13627), 4580 states have internal predecessors, (13627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:53,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 13627 transitions. [2021-06-05 04:07:53,843 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 13627 transitions. Word has length 22 [2021-06-05 04:07:53,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:53,843 INFO L482 AbstractCegarLoop]: Abstraction has 4581 states and 13627 transitions. [2021-06-05 04:07:53,843 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 04:07:53,843 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 13627 transitions. [2021-06-05 04:07:53,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:07:53,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:53,847 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:54,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9859,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:54,047 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:54,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:54,047 INFO L82 PathProgramCache]: Analyzing trace with hash 510781845, now seen corresponding path program 150 times [2021-06-05 04:07:54,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:54,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552109254] [2021-06-05 04:07:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:54,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:54,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552109254] [2021-06-05 04:07:54,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552109254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:54,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994414526] [2021-06-05 04:07:54,115 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 04:07:54,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:07:54,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:54,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:54,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:54,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994414526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:54,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:54,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:07:54,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371826235] [2021-06-05 04:07:54,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:07:54,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:54,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:07:54,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:07:54,181 INFO L87 Difference]: Start difference. First operand 4581 states and 13627 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 04:07:54,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:54,263 INFO L93 Difference]: Finished difference Result 5002 states and 14452 transitions. [2021-06-05 04:07:54,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:07:54,263 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 04:07:54,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:54,268 INFO L225 Difference]: With dead ends: 5002 [2021-06-05 04:07:54,268 INFO L226 Difference]: Without dead ends: 5002 [2021-06-05 04:07:54,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:07:54,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5002 states. [2021-06-05 04:07:54,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5002 to 4539. [2021-06-05 04:07:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4538 states have (on average 2.9726751873071837) internal successors, (13490), 4538 states have internal predecessors, (13490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 13490 transitions. [2021-06-05 04:07:54,323 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 13490 transitions. Word has length 22 [2021-06-05 04:07:54,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:54,324 INFO L482 AbstractCegarLoop]: Abstraction has 4539 states and 13490 transitions. [2021-06-05 04:07:54,324 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 04:07:54,324 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 13490 transitions. [2021-06-05 04:07:54,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:07:54,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:54,327 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:54,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9860 [2021-06-05 04:07:54,528 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:54,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1655986249, now seen corresponding path program 151 times [2021-06-05 04:07:54,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:54,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967799276] [2021-06-05 04:07:54,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:54,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:54,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967799276] [2021-06-05 04:07:54,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967799276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:54,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089380799] [2021-06-05 04:07:54,591 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 04:07:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:54,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:54,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:54,660 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 04:07:54,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089380799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:54,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:54,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:07:54,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083729115] [2021-06-05 04:07:54,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:07:54,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:54,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:07:54,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:07:54,661 INFO L87 Difference]: Start difference. First operand 4539 states and 13490 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 04:07:54,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:54,815 INFO L93 Difference]: Finished difference Result 4827 states and 13939 transitions. [2021-06-05 04:07:54,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:07:54,816 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 04:07:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:54,821 INFO L225 Difference]: With dead ends: 4827 [2021-06-05 04:07:54,821 INFO L226 Difference]: Without dead ends: 4825 [2021-06-05 04:07:54,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=209, Invalid=343, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:07:54,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4825 states. [2021-06-05 04:07:54,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4825 to 4570. [2021-06-05 04:07:54,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4569 states have (on average 2.9739549135478223) internal successors, (13588), 4569 states have internal predecessors, (13588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:54,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 13588 transitions. [2021-06-05 04:07:54,876 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 13588 transitions. Word has length 22 [2021-06-05 04:07:54,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:54,876 INFO L482 AbstractCegarLoop]: Abstraction has 4570 states and 13588 transitions. [2021-06-05 04:07:54,876 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 04:07:54,876 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 13588 transitions. [2021-06-05 04:07:54,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:07:54,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:54,880 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:55,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9861,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:55,081 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:55,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:55,081 INFO L82 PathProgramCache]: Analyzing trace with hash -921231987, now seen corresponding path program 152 times [2021-06-05 04:07:55,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:55,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362494730] [2021-06-05 04:07:55,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:55,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:55,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362494730] [2021-06-05 04:07:55,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362494730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:55,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409661687] [2021-06-05 04:07:55,147 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 04:07:55,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:07:55,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:55,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:55,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:55,219 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 04:07:55,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409661687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:55,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:55,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:07:55,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360191169] [2021-06-05 04:07:55,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:07:55,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:55,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:07:55,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:07:55,220 INFO L87 Difference]: Start difference. First operand 4570 states and 13588 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 04:07:55,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:55,291 INFO L93 Difference]: Finished difference Result 5088 states and 14673 transitions. [2021-06-05 04:07:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:07:55,292 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 04:07:55,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:55,298 INFO L225 Difference]: With dead ends: 5088 [2021-06-05 04:07:55,298 INFO L226 Difference]: Without dead ends: 5088 [2021-06-05 04:07:55,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:07:55,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2021-06-05 04:07:55,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 4572. [2021-06-05 04:07:55,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4571 states have (on average 2.9739663093415007) internal successors, (13594), 4571 states have internal predecessors, (13594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:55,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 13594 transitions. [2021-06-05 04:07:55,362 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 13594 transitions. Word has length 22 [2021-06-05 04:07:55,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:55,362 INFO L482 AbstractCegarLoop]: Abstraction has 4572 states and 13594 transitions. [2021-06-05 04:07:55,362 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 04:07:55,362 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 13594 transitions. [2021-06-05 04:07:55,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:07:55,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:55,367 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:55,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9862 [2021-06-05 04:07:55,567 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:55,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:55,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1644687975, now seen corresponding path program 153 times [2021-06-05 04:07:55,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:55,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796409666] [2021-06-05 04:07:55,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:55,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:55,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796409666] [2021-06-05 04:07:55,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796409666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:55,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634168891] [2021-06-05 04:07:55,648 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 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 04:07:55,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:07:55,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:55,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:55,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:55,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634168891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:55,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:55,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:07:55,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486080380] [2021-06-05 04:07:55,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:07:55,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:55,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:07:55,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:07:55,726 INFO L87 Difference]: Start difference. First operand 4572 states and 13594 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 04:07:55,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:55,810 INFO L93 Difference]: Finished difference Result 5431 states and 15640 transitions. [2021-06-05 04:07:55,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:07:55,811 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 04:07:55,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:55,816 INFO L225 Difference]: With dead ends: 5431 [2021-06-05 04:07:55,816 INFO L226 Difference]: Without dead ends: 5431 [2021-06-05 04:07:55,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:07:55,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2021-06-05 04:07:55,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 4529. [2021-06-05 04:07:55,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4529 states, 4528 states have (on average 2.9712897526501765) internal successors, (13454), 4528 states have internal predecessors, (13454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:55,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4529 states to 4529 states and 13454 transitions. [2021-06-05 04:07:55,871 INFO L78 Accepts]: Start accepts. Automaton has 4529 states and 13454 transitions. Word has length 22 [2021-06-05 04:07:55,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:55,871 INFO L482 AbstractCegarLoop]: Abstraction has 4529 states and 13454 transitions. [2021-06-05 04:07:55,871 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 04:07:55,871 INFO L276 IsEmpty]: Start isEmpty. Operand 4529 states and 13454 transitions. [2021-06-05 04:07:55,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:07:55,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:55,874 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:56,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9863 [2021-06-05 04:07:56,075 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:56,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:56,075 INFO L82 PathProgramCache]: Analyzing trace with hash 213230417, now seen corresponding path program 154 times [2021-06-05 04:07:56,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:56,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989127795] [2021-06-05 04:07:56,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:56,133 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 04:07:56,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:56,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989127795] [2021-06-05 04:07:56,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989127795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:56,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985279871] [2021-06-05 04:07:56,133 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 04:07:56,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:07:56,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:56,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:56,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:56,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985279871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:56,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:56,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:07:56,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735145709] [2021-06-05 04:07:56,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:07:56,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:56,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:07:56,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:07:56,193 INFO L87 Difference]: Start difference. First operand 4529 states and 13454 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 04:07:56,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:56,358 INFO L93 Difference]: Finished difference Result 4816 states and 13905 transitions. [2021-06-05 04:07:56,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:07:56,362 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 04:07:56,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:56,369 INFO L225 Difference]: With dead ends: 4816 [2021-06-05 04:07:56,369 INFO L226 Difference]: Without dead ends: 4814 [2021-06-05 04:07:56,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=208, Invalid=344, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:07:56,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2021-06-05 04:07:56,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 4562. [2021-06-05 04:07:56,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4562 states, 4561 states have (on average 2.9723744792808593) internal successors, (13557), 4561 states have internal predecessors, (13557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4562 states to 4562 states and 13557 transitions. [2021-06-05 04:07:56,427 INFO L78 Accepts]: Start accepts. Automaton has 4562 states and 13557 transitions. Word has length 22 [2021-06-05 04:07:56,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:56,428 INFO L482 AbstractCegarLoop]: Abstraction has 4562 states and 13557 transitions. [2021-06-05 04:07:56,428 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 04:07:56,428 INFO L276 IsEmpty]: Start isEmpty. Operand 4562 states and 13557 transitions. [2021-06-05 04:07:56,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:07:56,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:56,432 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:56,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9864,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:56,633 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:56,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:56,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1930979477, now seen corresponding path program 155 times [2021-06-05 04:07:56,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:56,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488807665] [2021-06-05 04:07:56,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:56,692 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 04:07:56,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:56,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488807665] [2021-06-05 04:07:56,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488807665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:56,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688436978] [2021-06-05 04:07:56,693 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 04:07:56,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:07:56,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:56,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:56,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:56,758 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 04:07:56,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688436978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:56,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:56,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:07:56,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636344666] [2021-06-05 04:07:56,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:07:56,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:56,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:07:56,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:07:56,759 INFO L87 Difference]: Start difference. First operand 4562 states and 13557 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 04:07:56,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:56,828 INFO L93 Difference]: Finished difference Result 5117 states and 14760 transitions. [2021-06-05 04:07:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:07:56,828 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 04:07:56,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:56,833 INFO L225 Difference]: With dead ends: 5117 [2021-06-05 04:07:56,833 INFO L226 Difference]: Without dead ends: 5117 [2021-06-05 04:07:56,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:07:56,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-06-05 04:07:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4563. [2021-06-05 04:07:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 2.9723805348531345) internal successors, (13560), 4562 states have internal predecessors, (13560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:56,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 13560 transitions. [2021-06-05 04:07:56,910 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 13560 transitions. Word has length 22 [2021-06-05 04:07:56,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:56,910 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 13560 transitions. [2021-06-05 04:07:56,910 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 04:07:56,910 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 13560 transitions. [2021-06-05 04:07:56,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:07:56,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:56,914 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:57,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9865 [2021-06-05 04:07:57,114 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:57,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:57,115 INFO L82 PathProgramCache]: Analyzing trace with hash 201932143, now seen corresponding path program 156 times [2021-06-05 04:07:57,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:57,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829891637] [2021-06-05 04:07:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:57,176 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 04:07:57,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:57,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829891637] [2021-06-05 04:07:57,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829891637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:57,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323572923] [2021-06-05 04:07:57,176 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 04:07:57,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:07:57,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:57,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:57,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:57,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323572923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:57,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:57,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:07:57,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140680366] [2021-06-05 04:07:57,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:07:57,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:57,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:07:57,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:07:57,252 INFO L87 Difference]: Start difference. First operand 4563 states and 13560 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 04:07:57,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:57,346 INFO L93 Difference]: Finished difference Result 5624 states and 16198 transitions. [2021-06-05 04:07:57,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:07:57,347 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 04:07:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:57,352 INFO L225 Difference]: With dead ends: 5624 [2021-06-05 04:07:57,352 INFO L226 Difference]: Without dead ends: 5624 [2021-06-05 04:07:57,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:07:57,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5624 states. [2021-06-05 04:07:57,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5624 to 4520. [2021-06-05 04:07:57,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4520 states, 4519 states have (on average 2.969240982518256) internal successors, (13418), 4519 states have internal predecessors, (13418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 13418 transitions. [2021-06-05 04:07:57,409 INFO L78 Accepts]: Start accepts. Automaton has 4520 states and 13418 transitions. Word has length 22 [2021-06-05 04:07:57,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:57,409 INFO L482 AbstractCegarLoop]: Abstraction has 4520 states and 13418 transitions. [2021-06-05 04:07:57,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:57,410 INFO L276 IsEmpty]: Start isEmpty. Operand 4520 states and 13418 transitions. [2021-06-05 04:07:57,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:07:57,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:57,413 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:57,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9866,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:57,614 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:57,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:57,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1858927659, now seen corresponding path program 157 times [2021-06-05 04:07:57,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:57,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865968071] [2021-06-05 04:07:57,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:57,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:57,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865968071] [2021-06-05 04:07:57,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865968071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:57,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422550020] [2021-06-05 04:07:57,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:07:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:57,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:57,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:57,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422550020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:57,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:57,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:07:57,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413835771] [2021-06-05 04:07:57,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:07:57,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:57,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:07:57,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:07:57,754 INFO L87 Difference]: Start difference. First operand 4520 states and 13418 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 04:07:57,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:57,876 INFO L93 Difference]: Finished difference Result 7402 states and 21575 transitions. [2021-06-05 04:07:57,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:07:57,876 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 04:07:57,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:57,886 INFO L225 Difference]: With dead ends: 7402 [2021-06-05 04:07:57,886 INFO L226 Difference]: Without dead ends: 7402 [2021-06-05 04:07:57,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:07:57,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7402 states. [2021-06-05 04:07:57,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7402 to 6132. [2021-06-05 04:07:57,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6132 states, 6131 states have (on average 2.9955961507095092) internal successors, (18366), 6131 states have internal predecessors, (18366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:57,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 18366 transitions. [2021-06-05 04:07:57,981 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 18366 transitions. Word has length 22 [2021-06-05 04:07:57,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:57,981 INFO L482 AbstractCegarLoop]: Abstraction has 6132 states and 18366 transitions. [2021-06-05 04:07:57,981 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 04:07:57,981 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 18366 transitions. [2021-06-05 04:07:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:07:57,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:57,987 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:58,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9867 [2021-06-05 04:07:58,187 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:58,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:58,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1562527415, now seen corresponding path program 158 times [2021-06-05 04:07:58,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:58,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127032048] [2021-06-05 04:07:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:58,243 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 04:07:58,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:58,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127032048] [2021-06-05 04:07:58,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127032048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:58,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671837777] [2021-06-05 04:07:58,244 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 04:07:58,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:07:58,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:58,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:58,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:58,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671837777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:58,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:58,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:07:58,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534733358] [2021-06-05 04:07:58,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:07:58,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:58,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:07:58,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:07:58,323 INFO L87 Difference]: Start difference. First operand 6132 states and 18366 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 04:07:58,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:58,492 INFO L93 Difference]: Finished difference Result 6467 states and 18987 transitions. [2021-06-05 04:07:58,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:07:58,492 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 04:07:58,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:58,499 INFO L225 Difference]: With dead ends: 6467 [2021-06-05 04:07:58,499 INFO L226 Difference]: Without dead ends: 6465 [2021-06-05 04:07:58,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=207, Invalid=345, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:07:58,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6465 states. [2021-06-05 04:07:58,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6465 to 6222. [2021-06-05 04:07:58,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 2.9975888120880887) internal successors, (18648), 6221 states have internal predecessors, (18648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:58,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 18648 transitions. [2021-06-05 04:07:58,583 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 18648 transitions. Word has length 22 [2021-06-05 04:07:58,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:58,583 INFO L482 AbstractCegarLoop]: Abstraction has 6222 states and 18648 transitions. [2021-06-05 04:07:58,583 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 04:07:58,583 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 18648 transitions. [2021-06-05 04:07:58,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:07:58,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:58,589 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:58,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9868,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:58,789 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:58,789 INFO L82 PathProgramCache]: Analyzing trace with hash 155221645, now seen corresponding path program 159 times [2021-06-05 04:07:58,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:58,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051278753] [2021-06-05 04:07:58,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:58,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:58,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051278753] [2021-06-05 04:07:58,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051278753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:58,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057273902] [2021-06-05 04:07:58,876 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 04:07:58,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:07:58,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:58,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:58,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:58,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057273902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:58,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:58,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:07:58,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528343206] [2021-06-05 04:07:58,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:07:58,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:58,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:07:58,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:07:58,947 INFO L87 Difference]: Start difference. First operand 6222 states and 18648 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 04:07:59,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:59,013 INFO L93 Difference]: Finished difference Result 6454 states and 18938 transitions. [2021-06-05 04:07:59,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:07:59,014 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 04:07:59,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:59,019 INFO L225 Difference]: With dead ends: 6454 [2021-06-05 04:07:59,019 INFO L226 Difference]: Without dead ends: 6454 [2021-06-05 04:07:59,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:07:59,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2021-06-05 04:07:59,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 6210. [2021-06-05 04:07:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6210 states, 6209 states have (on average 2.995490417136415) internal successors, (18599), 6209 states have internal predecessors, (18599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:59,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6210 states to 6210 states and 18599 transitions. [2021-06-05 04:07:59,089 INFO L78 Accepts]: Start accepts. Automaton has 6210 states and 18599 transitions. Word has length 22 [2021-06-05 04:07:59,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:59,089 INFO L482 AbstractCegarLoop]: Abstraction has 6210 states and 18599 transitions. [2021-06-05 04:07:59,089 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 04:07:59,089 INFO L276 IsEmpty]: Start isEmpty. Operand 6210 states and 18599 transitions. [2021-06-05 04:07:59,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:07:59,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:59,094 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:59,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9869,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:59,294 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:59,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:59,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1573825689, now seen corresponding path program 160 times [2021-06-05 04:07:59,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:59,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968593087] [2021-06-05 04:07:59,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:59,354 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 04:07:59,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:59,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968593087] [2021-06-05 04:07:59,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968593087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:59,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513240997] [2021-06-05 04:07:59,355 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 04:07:59,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:07:59,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:59,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:59,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:59,419 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 04:07:59,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513240997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:59,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:59,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:07:59,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53232444] [2021-06-05 04:07:59,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:07:59,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:59,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:07:59,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:07:59,420 INFO L87 Difference]: Start difference. First operand 6210 states and 18599 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 04:07:59,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:59,509 INFO L93 Difference]: Finished difference Result 7159 states and 20967 transitions. [2021-06-05 04:07:59,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:07:59,510 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 04:07:59,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:59,516 INFO L225 Difference]: With dead ends: 7159 [2021-06-05 04:07:59,516 INFO L226 Difference]: Without dead ends: 7159 [2021-06-05 04:07:59,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:07:59,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7159 states. [2021-06-05 04:07:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7159 to 6221. [2021-06-05 04:07:59,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6221 states, 6220 states have (on average 2.995498392282958) internal successors, (18632), 6220 states have internal predecessors, (18632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:59,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6221 states to 6221 states and 18632 transitions. [2021-06-05 04:07:59,593 INFO L78 Accepts]: Start accepts. Automaton has 6221 states and 18632 transitions. Word has length 22 [2021-06-05 04:07:59,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:59,593 INFO L482 AbstractCegarLoop]: Abstraction has 6221 states and 18632 transitions. [2021-06-05 04:07:59,593 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 04:07:59,593 INFO L276 IsEmpty]: Start isEmpty. Operand 6221 states and 18632 transitions. [2021-06-05 04:07:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:07:59,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:59,598 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:59,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9870,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:59,801 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:59,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:59,801 INFO L82 PathProgramCache]: Analyzing trace with hash 660281805, now seen corresponding path program 161 times [2021-06-05 04:07:59,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:59,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913509993] [2021-06-05 04:07:59,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:59,872 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:59,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:59,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913509993] [2021-06-05 04:07:59,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913509993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:59,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405717357] [2021-06-05 04:07:59,872 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 04:07:59,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:07:59,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:59,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:59,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:59,947 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 04:07:59,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405717357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:59,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:59,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:07:59,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364503165] [2021-06-05 04:07:59,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:07:59,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:59,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:07:59,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:07:59,948 INFO L87 Difference]: Start difference. First operand 6221 states and 18632 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 04:08:00,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:00,056 INFO L93 Difference]: Finished difference Result 10072 states and 29921 transitions. [2021-06-05 04:08:00,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:08:00,056 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 04:08:00,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:00,070 INFO L225 Difference]: With dead ends: 10072 [2021-06-05 04:08:00,070 INFO L226 Difference]: Without dead ends: 10072 [2021-06-05 04:08:00,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:08:00,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10072 states. [2021-06-05 04:08:00,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10072 to 9194. [2021-06-05 04:08:00,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9194 states, 9193 states have (on average 3.024583922549766) internal successors, (27805), 9193 states have internal predecessors, (27805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9194 states to 9194 states and 27805 transitions. [2021-06-05 04:08:00,212 INFO L78 Accepts]: Start accepts. Automaton has 9194 states and 27805 transitions. Word has length 22 [2021-06-05 04:08:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:00,213 INFO L482 AbstractCegarLoop]: Abstraction has 9194 states and 27805 transitions. [2021-06-05 04:08:00,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:00,213 INFO L276 IsEmpty]: Start isEmpty. Operand 9194 states and 27805 transitions. [2021-06-05 04:08:00,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:00,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:00,224 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:00,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9871,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:00,427 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:00,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:00,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1198137383, now seen corresponding path program 162 times [2021-06-05 04:08:00,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:00,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986117582] [2021-06-05 04:08:00,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:00,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:00,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986117582] [2021-06-05 04:08:00,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986117582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:00,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057984913] [2021-06-05 04:08:00,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:08:00,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:08:00,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:00,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:00,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:00,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057984913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:00,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:00,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:08:00,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359916819] [2021-06-05 04:08:00,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:00,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:00,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:00,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:00,569 INFO L87 Difference]: Start difference. First operand 9194 states and 27805 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 04:08:00,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:00,728 INFO L93 Difference]: Finished difference Result 13143 states and 39385 transitions. [2021-06-05 04:08:00,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:08:00,728 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 04:08:00,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:00,744 INFO L225 Difference]: With dead ends: 13143 [2021-06-05 04:08:00,744 INFO L226 Difference]: Without dead ends: 13143 [2021-06-05 04:08:00,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:08:00,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13143 states. [2021-06-05 04:08:00,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13143 to 11491. [2021-06-05 04:08:00,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11491 states, 11490 states have (on average 3.0464751958224543) internal successors, (35004), 11490 states have internal predecessors, (35004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11491 states to 11491 states and 35004 transitions. [2021-06-05 04:08:00,909 INFO L78 Accepts]: Start accepts. Automaton has 11491 states and 35004 transitions. Word has length 22 [2021-06-05 04:08:00,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:00,909 INFO L482 AbstractCegarLoop]: Abstraction has 11491 states and 35004 transitions. [2021-06-05 04:08:00,910 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 04:08:00,910 INFO L276 IsEmpty]: Start isEmpty. Operand 11491 states and 35004 transitions. [2021-06-05 04:08:00,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:00,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:00,918 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:01,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9872 [2021-06-05 04:08:01,119 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:01,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:01,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1940843115, now seen corresponding path program 163 times [2021-06-05 04:08:01,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:01,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636243057] [2021-06-05 04:08:01,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:08:01,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:01,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636243057] [2021-06-05 04:08:01,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636243057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:01,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022506014] [2021-06-05 04:08:01,178 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 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 04:08:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:01,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:01,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:08:01,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022506014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:01,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:01,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:08:01,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121994364] [2021-06-05 04:08:01,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:08:01,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:01,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:08:01,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:08:01,236 INFO L87 Difference]: Start difference. First operand 11491 states and 35004 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 04:08:01,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:01,386 INFO L93 Difference]: Finished difference Result 12000 states and 36264 transitions. [2021-06-05 04:08:01,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:08:01,387 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 22 [2021-06-05 04:08:01,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:01,400 INFO L225 Difference]: With dead ends: 12000 [2021-06-05 04:08:01,400 INFO L226 Difference]: Without dead ends: 11996 [2021-06-05 04:08:01,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:08:01,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11996 states. [2021-06-05 04:08:01,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11996 to 11808. [2021-06-05 04:08:01,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11808 states, 11807 states have (on average 3.0505632252053867) internal successors, (36018), 11807 states have internal predecessors, (36018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:01,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11808 states to 11808 states and 36018 transitions. [2021-06-05 04:08:01,555 INFO L78 Accepts]: Start accepts. Automaton has 11808 states and 36018 transitions. Word has length 22 [2021-06-05 04:08:01,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:01,555 INFO L482 AbstractCegarLoop]: Abstraction has 11808 states and 36018 transitions. [2021-06-05 04:08:01,555 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 04:08:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 11808 states and 36018 transitions. [2021-06-05 04:08:01,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:01,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:01,563 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:01,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9873 [2021-06-05 04:08:01,764 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:01,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:01,764 INFO L82 PathProgramCache]: Analyzing trace with hash 469575189, now seen corresponding path program 164 times [2021-06-05 04:08:01,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:01,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851703178] [2021-06-05 04:08:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:01,822 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 04:08:01,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:01,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851703178] [2021-06-05 04:08:01,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851703178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:01,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942977165] [2021-06-05 04:08:01,823 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 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 04:08:01,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:01,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:01,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:01,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:01,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942977165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:01,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:01,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:08:01,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781669699] [2021-06-05 04:08:01,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:08:01,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:01,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:08:01,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:08:01,889 INFO L87 Difference]: Start difference. First operand 11808 states and 36018 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 04:08:02,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:02,014 INFO L93 Difference]: Finished difference Result 14397 states and 43404 transitions. [2021-06-05 04:08:02,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:08:02,014 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 04:08:02,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:02,032 INFO L225 Difference]: With dead ends: 14397 [2021-06-05 04:08:02,032 INFO L226 Difference]: Without dead ends: 14397 [2021-06-05 04:08:02,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:08:02,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14397 states. [2021-06-05 04:08:02,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14397 to 12614. [2021-06-05 04:08:02,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12614 states, 12613 states have (on average 3.0629509236502024) internal successors, (38633), 12613 states have internal predecessors, (38633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:02,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12614 states to 12614 states and 38633 transitions. [2021-06-05 04:08:02,261 INFO L78 Accepts]: Start accepts. Automaton has 12614 states and 38633 transitions. Word has length 22 [2021-06-05 04:08:02,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:02,261 INFO L482 AbstractCegarLoop]: Abstraction has 12614 states and 38633 transitions. [2021-06-05 04:08:02,261 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 04:08:02,261 INFO L276 IsEmpty]: Start isEmpty. Operand 12614 states and 38633 transitions. [2021-06-05 04:08:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:02,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:02,270 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:02,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9874,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:02,470 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:02,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:02,471 INFO L82 PathProgramCache]: Analyzing trace with hash -36771077, now seen corresponding path program 165 times [2021-06-05 04:08:02,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:02,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250412761] [2021-06-05 04:08:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:02,538 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:02,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:02,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250412761] [2021-06-05 04:08:02,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250412761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:02,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565292873] [2021-06-05 04:08:02,539 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 04:08:02,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:08:02,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:02,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:02,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:02,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565292873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:02,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:02,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:08:02,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101890859] [2021-06-05 04:08:02,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:02,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:02,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:02,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:02,609 INFO L87 Difference]: Start difference. First operand 12614 states and 38633 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 04:08:02,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:02,754 INFO L93 Difference]: Finished difference Result 15242 states and 46024 transitions. [2021-06-05 04:08:02,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:08:02,754 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 04:08:02,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:02,777 INFO L225 Difference]: With dead ends: 15242 [2021-06-05 04:08:02,777 INFO L226 Difference]: Without dead ends: 15242 [2021-06-05 04:08:02,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15242 states. [2021-06-05 04:08:02,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15242 to 6456. [2021-06-05 04:08:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6456 states, 6455 states have (on average 3.013787761425252) internal successors, (19454), 6455 states have internal predecessors, (19454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:02,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6456 states to 6456 states and 19454 transitions. [2021-06-05 04:08:02,921 INFO L78 Accepts]: Start accepts. Automaton has 6456 states and 19454 transitions. Word has length 22 [2021-06-05 04:08:02,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:02,921 INFO L482 AbstractCegarLoop]: Abstraction has 6456 states and 19454 transitions. [2021-06-05 04:08:02,921 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 04:08:02,921 INFO L276 IsEmpty]: Start isEmpty. Operand 6456 states and 19454 transitions. [2021-06-05 04:08:02,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:02,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:02,926 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:03,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9875 [2021-06-05 04:08:03,127 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:03,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:03,127 INFO L82 PathProgramCache]: Analyzing trace with hash 501084501, now seen corresponding path program 166 times [2021-06-05 04:08:03,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:03,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457779415] [2021-06-05 04:08:03,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:03,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:03,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457779415] [2021-06-05 04:08:03,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457779415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:03,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220732410] [2021-06-05 04:08:03,202 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 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 04:08:03,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:03,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:03,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:03,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:03,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220732410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:03,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:03,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:08:03,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715634322] [2021-06-05 04:08:03,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:03,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:03,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:03,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:03,271 INFO L87 Difference]: Start difference. First operand 6456 states and 19454 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 04:08:03,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:03,427 INFO L93 Difference]: Finished difference Result 9785 states and 29004 transitions. [2021-06-05 04:08:03,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:08:03,427 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 04:08:03,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:03,439 INFO L225 Difference]: With dead ends: 9785 [2021-06-05 04:08:03,439 INFO L226 Difference]: Without dead ends: 9785 [2021-06-05 04:08:03,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:08:03,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9785 states. [2021-06-05 04:08:03,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9785 to 6500. [2021-06-05 04:08:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6500 states, 6499 states have (on average 3.014002154177566) internal successors, (19588), 6499 states have internal predecessors, (19588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6500 states to 6500 states and 19588 transitions. [2021-06-05 04:08:03,550 INFO L78 Accepts]: Start accepts. Automaton has 6500 states and 19588 transitions. Word has length 22 [2021-06-05 04:08:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:03,550 INFO L482 AbstractCegarLoop]: Abstraction has 6500 states and 19588 transitions. [2021-06-05 04:08:03,550 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 04:08:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 6500 states and 19588 transitions. [2021-06-05 04:08:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:03,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:03,555 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:03,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9876,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:03,756 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:03,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:03,756 INFO L82 PathProgramCache]: Analyzing trace with hash -776445359, now seen corresponding path program 167 times [2021-06-05 04:08:03,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:03,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343651761] [2021-06-05 04:08:03,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:03,809 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 04:08:03,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:03,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343651761] [2021-06-05 04:08:03,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343651761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:03,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655827918] [2021-06-05 04:08:03,809 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 04:08:03,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:08:03,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:03,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:03,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:03,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655827918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:03,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:03,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:08:03,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029647281] [2021-06-05 04:08:03,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:08:03,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:03,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:08:03,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:08:03,872 INFO L87 Difference]: Start difference. First operand 6500 states and 19588 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 04:08:04,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:04,028 INFO L93 Difference]: Finished difference Result 6765 states and 19991 transitions. [2021-06-05 04:08:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:08:04,028 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 04:08:04,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:04,035 INFO L225 Difference]: With dead ends: 6765 [2021-06-05 04:08:04,035 INFO L226 Difference]: Without dead ends: 6761 [2021-06-05 04:08:04,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=206, Invalid=346, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:08:04,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6761 states. [2021-06-05 04:08:04,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6761 to 6403. [2021-06-05 04:08:04,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6403 states, 6402 states have (on average 3.009215870040612) internal successors, (19265), 6402 states have internal predecessors, (19265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6403 states to 6403 states and 19265 transitions. [2021-06-05 04:08:04,115 INFO L78 Accepts]: Start accepts. Automaton has 6403 states and 19265 transitions. Word has length 22 [2021-06-05 04:08:04,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:04,115 INFO L482 AbstractCegarLoop]: Abstraction has 6403 states and 19265 transitions. [2021-06-05 04:08:04,115 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 04:08:04,115 INFO L276 IsEmpty]: Start isEmpty. Operand 6403 states and 19265 transitions. [2021-06-05 04:08:04,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:04,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:04,120 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:04,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9877 [2021-06-05 04:08:04,320 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:04,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:04,321 INFO L82 PathProgramCache]: Analyzing trace with hash 941303701, now seen corresponding path program 168 times [2021-06-05 04:08:04,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:04,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915590619] [2021-06-05 04:08:04,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:04,376 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 04:08:04,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:04,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915590619] [2021-06-05 04:08:04,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915590619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:04,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163070653] [2021-06-05 04:08:04,376 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 04:08:04,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:08:04,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:04,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:04,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:04,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163070653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:04,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:04,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:08:04,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508249419] [2021-06-05 04:08:04,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:08:04,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:04,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:08:04,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:08:04,467 INFO L87 Difference]: Start difference. First operand 6403 states and 19265 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 04:08:04,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:04,563 INFO L93 Difference]: Finished difference Result 6899 states and 20313 transitions. [2021-06-05 04:08:04,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:08:04,563 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 04:08:04,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:04,577 INFO L225 Difference]: With dead ends: 6899 [2021-06-05 04:08:04,577 INFO L226 Difference]: Without dead ends: 6899 [2021-06-05 04:08:04,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:04,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-06-05 04:08:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 6402. [2021-06-05 04:08:04,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6402 states, 6401 states have (on average 3.0073426027183254) internal successors, (19250), 6401 states have internal predecessors, (19250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:04,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6402 states to 6402 states and 19250 transitions. [2021-06-05 04:08:04,700 INFO L78 Accepts]: Start accepts. Automaton has 6402 states and 19250 transitions. Word has length 22 [2021-06-05 04:08:04,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:04,700 INFO L482 AbstractCegarLoop]: Abstraction has 6402 states and 19250 transitions. [2021-06-05 04:08:04,700 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 04:08:04,700 INFO L276 IsEmpty]: Start isEmpty. Operand 6402 states and 19250 transitions. [2021-06-05 04:08:04,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:04,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:04,705 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:04,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9878,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:04,906 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:04,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:04,906 INFO L82 PathProgramCache]: Analyzing trace with hash -787743633, now seen corresponding path program 169 times [2021-06-05 04:08:04,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:04,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888720347] [2021-06-05 04:08:04,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:04,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:04,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888720347] [2021-06-05 04:08:04,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888720347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:04,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951357146] [2021-06-05 04:08:04,963 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 04:08:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:04,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:04,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:05,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951357146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:05,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:05,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:08:05,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316552187] [2021-06-05 04:08:05,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:05,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:05,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:05,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:05,043 INFO L87 Difference]: Start difference. First operand 6402 states and 19250 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 04:08:05,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:05,151 INFO L93 Difference]: Finished difference Result 6620 states and 19508 transitions. [2021-06-05 04:08:05,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:08:05,151 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 04:08:05,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:05,157 INFO L225 Difference]: With dead ends: 6620 [2021-06-05 04:08:05,158 INFO L226 Difference]: Without dead ends: 6620 [2021-06-05 04:08:05,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:05,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6620 states. [2021-06-05 04:08:05,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6620 to 6370. [2021-06-05 04:08:05,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6370 states, 6369 states have (on average 3.004396294551735) internal successors, (19135), 6369 states have internal predecessors, (19135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:05,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6370 states to 6370 states and 19135 transitions. [2021-06-05 04:08:05,229 INFO L78 Accepts]: Start accepts. Automaton has 6370 states and 19135 transitions. Word has length 22 [2021-06-05 04:08:05,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:05,229 INFO L482 AbstractCegarLoop]: Abstraction has 6370 states and 19135 transitions. [2021-06-05 04:08:05,229 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 04:08:05,229 INFO L276 IsEmpty]: Start isEmpty. Operand 6370 states and 19135 transitions. [2021-06-05 04:08:05,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:05,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:05,234 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:05,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9879,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:05,435 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:05,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:05,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1446363861, now seen corresponding path program 170 times [2021-06-05 04:08:05,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:05,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427730440] [2021-06-05 04:08:05,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:05,507 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 04:08:05,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:05,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427730440] [2021-06-05 04:08:05,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427730440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:05,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019503084] [2021-06-05 04:08:05,507 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 04:08:05,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:05,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:05,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:05,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:05,578 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 04:08:05,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019503084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:05,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:05,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:08:05,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405833934] [2021-06-05 04:08:05,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:05,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:05,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:05,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:05,579 INFO L87 Difference]: Start difference. First operand 6370 states and 19135 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 04:08:05,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:05,685 INFO L93 Difference]: Finished difference Result 7662 states and 22542 transitions. [2021-06-05 04:08:05,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:08:05,685 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 04:08:05,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:05,693 INFO L225 Difference]: With dead ends: 7662 [2021-06-05 04:08:05,693 INFO L226 Difference]: Without dead ends: 7662 [2021-06-05 04:08:05,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:05,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7662 states. [2021-06-05 04:08:05,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7662 to 6264. [2021-06-05 04:08:05,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6264 states, 6263 states have (on average 2.9996806642184257) internal successors, (18787), 6263 states have internal predecessors, (18787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:05,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6264 states to 6264 states and 18787 transitions. [2021-06-05 04:08:05,776 INFO L78 Accepts]: Start accepts. Automaton has 6264 states and 18787 transitions. Word has length 22 [2021-06-05 04:08:05,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:05,776 INFO L482 AbstractCegarLoop]: Abstraction has 6264 states and 18787 transitions. [2021-06-05 04:08:05,776 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 04:08:05,776 INFO L276 IsEmpty]: Start isEmpty. Operand 6264 states and 18787 transitions. [2021-06-05 04:08:05,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:05,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:05,780 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:05,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9880,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:05,981 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:05,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:05,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1984219439, now seen corresponding path program 171 times [2021-06-05 04:08:05,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:05,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371404428] [2021-06-05 04:08:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:06,054 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:06,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:06,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371404428] [2021-06-05 04:08:06,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371404428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:06,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206430614] [2021-06-05 04:08:06,054 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 04:08:06,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:08:06,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:06,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:06,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:06,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206430614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:06,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:06,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:08:06,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306271053] [2021-06-05 04:08:06,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:06,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:06,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:06,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:06,149 INFO L87 Difference]: Start difference. First operand 6264 states and 18787 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 04:08:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:06,282 INFO L93 Difference]: Finished difference Result 9995 states and 29712 transitions. [2021-06-05 04:08:06,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:08:06,283 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 04:08:06,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:06,295 INFO L225 Difference]: With dead ends: 9995 [2021-06-05 04:08:06,295 INFO L226 Difference]: Without dead ends: 9995 [2021-06-05 04:08:06,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:08:06,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9995 states. [2021-06-05 04:08:06,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9995 to 7256. [2021-06-05 04:08:06,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7256 states, 7255 states have (on average 3.0132322536181944) internal successors, (21861), 7255 states have internal predecessors, (21861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:06,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7256 states to 7256 states and 21861 transitions. [2021-06-05 04:08:06,408 INFO L78 Accepts]: Start accepts. Automaton has 7256 states and 21861 transitions. Word has length 22 [2021-06-05 04:08:06,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:06,408 INFO L482 AbstractCegarLoop]: Abstraction has 7256 states and 21861 transitions. [2021-06-05 04:08:06,408 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 04:08:06,408 INFO L276 IsEmpty]: Start isEmpty. Operand 7256 states and 21861 transitions. [2021-06-05 04:08:06,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:06,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:06,415 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:06,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9881 [2021-06-05 04:08:06,629 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:06,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1477873173, now seen corresponding path program 172 times [2021-06-05 04:08:06,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:06,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022929223] [2021-06-05 04:08:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:06,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:06,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:06,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022929223] [2021-06-05 04:08:06,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022929223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:06,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368056966] [2021-06-05 04:08:06,703 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 04:08:06,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:06,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:06,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:06,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:06,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368056966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:06,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:06,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:08:06,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758790046] [2021-06-05 04:08:06,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:06,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:06,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:06,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:06,792 INFO L87 Difference]: Start difference. First operand 7256 states and 21861 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 04:08:07,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:07,007 INFO L93 Difference]: Finished difference Result 11660 states and 34640 transitions. [2021-06-05 04:08:07,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:08:07,017 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 04:08:07,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:07,034 INFO L225 Difference]: With dead ends: 11660 [2021-06-05 04:08:07,035 INFO L226 Difference]: Without dead ends: 11660 [2021-06-05 04:08:07,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=309, Invalid=561, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:08:07,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11660 states. [2021-06-05 04:08:07,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11660 to 9258. [2021-06-05 04:08:07,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9258 states, 9257 states have (on average 3.0371610673004215) internal successors, (28115), 9257 states have internal predecessors, (28115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:07,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9258 states to 9258 states and 28115 transitions. [2021-06-05 04:08:07,206 INFO L78 Accepts]: Start accepts. Automaton has 9258 states and 28115 transitions. Word has length 22 [2021-06-05 04:08:07,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:07,206 INFO L482 AbstractCegarLoop]: Abstraction has 9258 states and 28115 transitions. [2021-06-05 04:08:07,206 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 04:08:07,206 INFO L276 IsEmpty]: Start isEmpty. Operand 9258 states and 28115 transitions. [2021-06-05 04:08:07,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:07,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:07,213 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:07,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9882,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:07,414 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:07,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:07,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2074645977, now seen corresponding path program 173 times [2021-06-05 04:08:07,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:07,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580780096] [2021-06-05 04:08:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:08:07,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:07,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580780096] [2021-06-05 04:08:07,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580780096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:07,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880958321] [2021-06-05 04:08:07,458 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 04:08:07,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:08:07,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:07,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:07,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:08:07,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880958321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:07,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:07,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:08:07,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896780709] [2021-06-05 04:08:07,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:08:07,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:07,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:08:07,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:08:07,523 INFO L87 Difference]: Start difference. First operand 9258 states and 28115 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 04:08:07,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:07,672 INFO L93 Difference]: Finished difference Result 9612 states and 28912 transitions. [2021-06-05 04:08:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:08:07,672 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 22 [2021-06-05 04:08:07,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:07,683 INFO L225 Difference]: With dead ends: 9612 [2021-06-05 04:08:07,683 INFO L226 Difference]: Without dead ends: 9608 [2021-06-05 04:08:07,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:08:07,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9608 states. [2021-06-05 04:08:07,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9608 to 9445. [2021-06-05 04:08:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9445 states, 9444 states have (on average 3.039919525624735) internal successors, (28709), 9444 states have internal predecessors, (28709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:07,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9445 states to 9445 states and 28709 transitions. [2021-06-05 04:08:07,810 INFO L78 Accepts]: Start accepts. Automaton has 9445 states and 28709 transitions. Word has length 22 [2021-06-05 04:08:07,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:07,811 INFO L482 AbstractCegarLoop]: Abstraction has 9445 states and 28709 transitions. [2021-06-05 04:08:07,811 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 04:08:07,811 INFO L276 IsEmpty]: Start isEmpty. Operand 9445 states and 28709 transitions. [2021-06-05 04:08:07,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:07,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:07,819 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:08,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9883 [2021-06-05 04:08:08,020 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:08,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:08,020 INFO L82 PathProgramCache]: Analyzing trace with hash 367281639, now seen corresponding path program 174 times [2021-06-05 04:08:08,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:08,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388845084] [2021-06-05 04:08:08,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:08,081 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 04:08:08,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:08,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388845084] [2021-06-05 04:08:08,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388845084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:08,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452989989] [2021-06-05 04:08:08,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:08:08,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 04:08:08,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:08,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:08,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:08,147 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 04:08:08,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452989989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:08,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:08,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:08:08,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896340567] [2021-06-05 04:08:08,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:08,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:08,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:08,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:08,148 INFO L87 Difference]: Start difference. First operand 9445 states and 28709 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 04:08:08,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:08,308 INFO L93 Difference]: Finished difference Result 12460 states and 37247 transitions. [2021-06-05 04:08:08,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:08:08,309 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 04:08:08,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:08,324 INFO L225 Difference]: With dead ends: 12460 [2021-06-05 04:08:08,324 INFO L226 Difference]: Without dead ends: 12460 [2021-06-05 04:08:08,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:08:08,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12460 states. [2021-06-05 04:08:08,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12460 to 9999. [2021-06-05 04:08:08,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9999 states, 9998 states have (on average 3.049109821964393) internal successors, (30485), 9998 states have internal predecessors, (30485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9999 states to 9999 states and 30485 transitions. [2021-06-05 04:08:08,471 INFO L78 Accepts]: Start accepts. Automaton has 9999 states and 30485 transitions. Word has length 22 [2021-06-05 04:08:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:08,471 INFO L482 AbstractCegarLoop]: Abstraction has 9999 states and 30485 transitions. [2021-06-05 04:08:08,471 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 04:08:08,472 INFO L276 IsEmpty]: Start isEmpty. Operand 9999 states and 30485 transitions. [2021-06-05 04:08:08,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:08,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:08,479 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:08,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9884 [2021-06-05 04:08:08,680 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:08,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:08,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1850416577, now seen corresponding path program 175 times [2021-06-05 04:08:08,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:08,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748965837] [2021-06-05 04:08:08,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:08,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:08,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748965837] [2021-06-05 04:08:08,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748965837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:08,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335524731] [2021-06-05 04:08:08,759 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 04:08:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:08,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:08,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:08,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335524731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:08,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:08,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:08:08,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511281885] [2021-06-05 04:08:08,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:08,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:08,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:08,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:08,849 INFO L87 Difference]: Start difference. First operand 9999 states and 30485 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 04:08:09,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:09,034 INFO L93 Difference]: Finished difference Result 12909 states and 38690 transitions. [2021-06-05 04:08:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:08:09,035 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 04:08:09,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:09,059 INFO L225 Difference]: With dead ends: 12909 [2021-06-05 04:08:09,060 INFO L226 Difference]: Without dead ends: 12909 [2021-06-05 04:08:09,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:08:09,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12909 states. [2021-06-05 04:08:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12909 to 6060. [2021-06-05 04:08:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6060 states, 6059 states have (on average 3.0120481927710845) internal successors, (18250), 6059 states have internal predecessors, (18250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6060 states to 6060 states and 18250 transitions. [2021-06-05 04:08:09,224 INFO L78 Accepts]: Start accepts. Automaton has 6060 states and 18250 transitions. Word has length 22 [2021-06-05 04:08:09,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:09,224 INFO L482 AbstractCegarLoop]: Abstraction has 6060 states and 18250 transitions. [2021-06-05 04:08:09,224 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 04:08:09,224 INFO L276 IsEmpty]: Start isEmpty. Operand 6060 states and 18250 transitions. [2021-06-05 04:08:09,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:09,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:09,231 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:09,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9885 [2021-06-05 04:08:09,444 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:09,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:09,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1344070311, now seen corresponding path program 176 times [2021-06-05 04:08:09,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:09,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384131355] [2021-06-05 04:08:09,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:09,511 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 04:08:09,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:09,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384131355] [2021-06-05 04:08:09,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384131355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:09,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512230225] [2021-06-05 04:08:09,511 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 04:08:09,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:09,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:09,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:09,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:09,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512230225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:09,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:09,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:08:09,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295960427] [2021-06-05 04:08:09,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:09,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:09,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:09,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:09,583 INFO L87 Difference]: Start difference. First operand 6060 states and 18250 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 04:08:09,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:09,804 INFO L93 Difference]: Finished difference Result 9798 states and 28894 transitions. [2021-06-05 04:08:09,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:08:09,804 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 04:08:09,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:09,815 INFO L225 Difference]: With dead ends: 9798 [2021-06-05 04:08:09,816 INFO L226 Difference]: Without dead ends: 9798 [2021-06-05 04:08:09,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=308, Invalid=562, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:08:09,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9798 states. [2021-06-05 04:08:09,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9798 to 5868. [2021-06-05 04:08:09,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5868 states, 5867 states have (on average 3.0093744673598093) internal successors, (17656), 5867 states have internal predecessors, (17656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5868 states to 5868 states and 17656 transitions. [2021-06-05 04:08:09,914 INFO L78 Accepts]: Start accepts. Automaton has 5868 states and 17656 transitions. Word has length 22 [2021-06-05 04:08:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:09,914 INFO L482 AbstractCegarLoop]: Abstraction has 5868 states and 17656 transitions. [2021-06-05 04:08:09,914 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 04:08:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 5868 states and 17656 transitions. [2021-06-05 04:08:09,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:09,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:09,919 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:10,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9886 [2021-06-05 04:08:10,119 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:10,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:10,120 INFO L82 PathProgramCache]: Analyzing trace with hash 2117261897, now seen corresponding path program 177 times [2021-06-05 04:08:10,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:10,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118687794] [2021-06-05 04:08:10,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:10,171 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 04:08:10,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:10,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118687794] [2021-06-05 04:08:10,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118687794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:10,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764527089] [2021-06-05 04:08:10,172 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 04:08:10,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:08:10,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:10,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:10,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:10,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764527089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:10,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:10,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:08:10,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646863009] [2021-06-05 04:08:10,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:08:10,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:10,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:08:10,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:08:10,235 INFO L87 Difference]: Start difference. First operand 5868 states and 17656 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 04:08:10,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:10,385 INFO L93 Difference]: Finished difference Result 6116 states and 18033 transitions. [2021-06-05 04:08:10,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:08:10,385 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 04:08:10,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:10,391 INFO L225 Difference]: With dead ends: 6116 [2021-06-05 04:08:10,391 INFO L226 Difference]: Without dead ends: 6112 [2021-06-05 04:08:10,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=205, Invalid=347, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:08:10,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2021-06-05 04:08:10,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 5813. [2021-06-05 04:08:10,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5813 states, 5812 states have (on average 3.0051617343427393) internal successors, (17466), 5812 states have internal predecessors, (17466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5813 states to 5813 states and 17466 transitions. [2021-06-05 04:08:10,456 INFO L78 Accepts]: Start accepts. Automaton has 5813 states and 17466 transitions. Word has length 22 [2021-06-05 04:08:10,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:10,456 INFO L482 AbstractCegarLoop]: Abstraction has 5813 states and 17466 transitions. [2021-06-05 04:08:10,456 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 04:08:10,457 INFO L276 IsEmpty]: Start isEmpty. Operand 5813 states and 17466 transitions. [2021-06-05 04:08:10,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:10,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:10,461 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:10,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9887 [2021-06-05 04:08:10,661 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:10,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:10,661 INFO L82 PathProgramCache]: Analyzing trace with hash -459956339, now seen corresponding path program 178 times [2021-06-05 04:08:10,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:10,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259732415] [2021-06-05 04:08:10,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:10,719 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 04:08:10,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:10,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259732415] [2021-06-05 04:08:10,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259732415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:10,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111838180] [2021-06-05 04:08:10,719 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 04:08:10,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:10,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:10,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:10,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:10,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111838180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:10,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:10,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:08:10,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813852097] [2021-06-05 04:08:10,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:08:10,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:10,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:08:10,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:08:10,783 INFO L87 Difference]: Start difference. First operand 5813 states and 17466 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 04:08:10,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:10,894 INFO L93 Difference]: Finished difference Result 6374 states and 18724 transitions. [2021-06-05 04:08:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:08:10,895 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 04:08:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:10,901 INFO L225 Difference]: With dead ends: 6374 [2021-06-05 04:08:10,901 INFO L226 Difference]: Without dead ends: 6374 [2021-06-05 04:08:10,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:10,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6374 states. [2021-06-05 04:08:10,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6374 to 5821. [2021-06-05 04:08:10,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 3.004982817869416) internal successors, (17489), 5820 states have internal predecessors, (17489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:10,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 17489 transitions. [2021-06-05 04:08:10,971 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 17489 transitions. Word has length 22 [2021-06-05 04:08:10,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:10,971 INFO L482 AbstractCegarLoop]: Abstraction has 5821 states and 17489 transitions. [2021-06-05 04:08:10,971 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 04:08:10,971 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 17489 transitions. [2021-06-05 04:08:10,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:10,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:10,975 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:11,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9888,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:11,176 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:11,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:11,176 INFO L82 PathProgramCache]: Analyzing trace with hash 2105963623, now seen corresponding path program 179 times [2021-06-05 04:08:11,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:11,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351613975] [2021-06-05 04:08:11,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:11,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:11,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351613975] [2021-06-05 04:08:11,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351613975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:11,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413632893] [2021-06-05 04:08:11,231 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 04:08:11,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:08:11,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:11,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:11,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:11,322 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 04:08:11,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413632893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:11,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:11,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:08:11,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753701864] [2021-06-05 04:08:11,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:11,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:11,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:11,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:11,324 INFO L87 Difference]: Start difference. First operand 5821 states and 17489 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 04:08:11,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:11,425 INFO L93 Difference]: Finished difference Result 6454 states and 18955 transitions. [2021-06-05 04:08:11,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:08:11,425 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 04:08:11,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:11,433 INFO L225 Difference]: With dead ends: 6454 [2021-06-05 04:08:11,434 INFO L226 Difference]: Without dead ends: 6454 [2021-06-05 04:08:11,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:08:11,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2021-06-05 04:08:11,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 5751. [2021-06-05 04:08:11,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5751 states, 5750 states have (on average 3.001391304347826) internal successors, (17258), 5750 states have internal predecessors, (17258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5751 states to 5751 states and 17258 transitions. [2021-06-05 04:08:11,515 INFO L78 Accepts]: Start accepts. Automaton has 5751 states and 17258 transitions. Word has length 22 [2021-06-05 04:08:11,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:11,515 INFO L482 AbstractCegarLoop]: Abstraction has 5751 states and 17258 transitions. [2021-06-05 04:08:11,515 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 04:08:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand 5751 states and 17258 transitions. [2021-06-05 04:08:11,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:11,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:11,520 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:11,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9889,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:11,720 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:11,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:11,721 INFO L82 PathProgramCache]: Analyzing trace with hash 45103821, now seen corresponding path program 180 times [2021-06-05 04:08:11,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:11,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10207737] [2021-06-05 04:08:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:11,776 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 04:08:11,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:11,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10207737] [2021-06-05 04:08:11,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10207737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:11,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753679435] [2021-06-05 04:08:11,776 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 04:08:11,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:08:11,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:11,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:11,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:11,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753679435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:11,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:11,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:08:11,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339838085] [2021-06-05 04:08:11,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:11,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:11,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:11,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:11,847 INFO L87 Difference]: Start difference. First operand 5751 states and 17258 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 04:08:11,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:11,938 INFO L93 Difference]: Finished difference Result 9965 states and 29813 transitions. [2021-06-05 04:08:11,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:08:11,938 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 04:08:11,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:11,950 INFO L225 Difference]: With dead ends: 9965 [2021-06-05 04:08:11,951 INFO L226 Difference]: Without dead ends: 9965 [2021-06-05 04:08:11,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:08:11,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9965 states. [2021-06-05 04:08:12,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9965 to 9679. [2021-06-05 04:08:12,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9679 states, 9678 states have (on average 3.0377144038024384) internal successors, (29399), 9678 states have internal predecessors, (29399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:12,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9679 states to 9679 states and 29399 transitions. [2021-06-05 04:08:12,105 INFO L78 Accepts]: Start accepts. Automaton has 9679 states and 29399 transitions. Word has length 22 [2021-06-05 04:08:12,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:12,105 INFO L482 AbstractCegarLoop]: Abstraction has 9679 states and 29399 transitions. [2021-06-05 04:08:12,105 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 04:08:12,105 INFO L276 IsEmpty]: Start isEmpty. Operand 9679 states and 29399 transitions. [2021-06-05 04:08:12,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:12,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:12,113 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:12,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9890,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:12,335 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:12,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:12,336 INFO L82 PathProgramCache]: Analyzing trace with hash 582959399, now seen corresponding path program 181 times [2021-06-05 04:08:12,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:12,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574066007] [2021-06-05 04:08:12,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:12,400 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 04:08:12,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:12,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574066007] [2021-06-05 04:08:12,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574066007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:12,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046402259] [2021-06-05 04:08:12,400 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 04:08:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:12,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:12,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:12,470 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 04:08:12,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046402259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:12,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:12,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:08:12,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896219469] [2021-06-05 04:08:12,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:12,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:12,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:12,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:12,471 INFO L87 Difference]: Start difference. First operand 9679 states and 29399 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 04:08:12,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:12,629 INFO L93 Difference]: Finished difference Result 10632 states and 31706 transitions. [2021-06-05 04:08:12,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:08:12,630 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 04:08:12,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:12,640 INFO L225 Difference]: With dead ends: 10632 [2021-06-05 04:08:12,640 INFO L226 Difference]: Without dead ends: 10632 [2021-06-05 04:08:12,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:08:12,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2021-06-05 04:08:12,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 8622. [2021-06-05 04:08:12,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8622 states, 8621 states have (on average 3.030506901751537) internal successors, (26126), 8621 states have internal predecessors, (26126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:12,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8622 states to 8622 states and 26126 transitions. [2021-06-05 04:08:12,753 INFO L78 Accepts]: Start accepts. Automaton has 8622 states and 26126 transitions. Word has length 22 [2021-06-05 04:08:12,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:12,753 INFO L482 AbstractCegarLoop]: Abstraction has 8622 states and 26126 transitions. [2021-06-05 04:08:12,753 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 04:08:12,753 INFO L276 IsEmpty]: Start isEmpty. Operand 8622 states and 26126 transitions. [2021-06-05 04:08:12,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:12,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:12,758 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:12,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9891 [2021-06-05 04:08:12,959 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:12,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:12,959 INFO L82 PathProgramCache]: Analyzing trace with hash 76613133, now seen corresponding path program 182 times [2021-06-05 04:08:12,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:12,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536163052] [2021-06-05 04:08:12,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:13,026 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 04:08:13,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:13,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536163052] [2021-06-05 04:08:13,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536163052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:13,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792970113] [2021-06-05 04:08:13,027 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 04:08:13,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:13,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:13,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:13,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:13,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792970113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:13,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:13,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:08:13,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383177240] [2021-06-05 04:08:13,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:13,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:13,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:13,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:13,098 INFO L87 Difference]: Start difference. First operand 8622 states and 26126 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 04:08:13,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:13,278 INFO L93 Difference]: Finished difference Result 14571 states and 43929 transitions. [2021-06-05 04:08:13,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:08:13,279 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 04:08:13,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:13,298 INFO L225 Difference]: With dead ends: 14571 [2021-06-05 04:08:13,298 INFO L226 Difference]: Without dead ends: 14571 [2021-06-05 04:08:13,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:08:13,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14571 states. [2021-06-05 04:08:13,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14571 to 13534. [2021-06-05 04:08:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13534 states, 13533 states have (on average 3.05660237936895) internal successors, (41365), 13533 states have internal predecessors, (41365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:13,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13534 states to 13534 states and 41365 transitions. [2021-06-05 04:08:13,511 INFO L78 Accepts]: Start accepts. Automaton has 13534 states and 41365 transitions. Word has length 22 [2021-06-05 04:08:13,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:13,511 INFO L482 AbstractCegarLoop]: Abstraction has 13534 states and 41365 transitions. [2021-06-05 04:08:13,511 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 04:08:13,511 INFO L276 IsEmpty]: Start isEmpty. Operand 13534 states and 41365 transitions. [2021-06-05 04:08:13,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:13,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:13,519 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:13,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9892 [2021-06-05 04:08:13,720 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:13,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:13,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1559748071, now seen corresponding path program 183 times [2021-06-05 04:08:13,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:13,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512545159] [2021-06-05 04:08:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:13,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:13,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512545159] [2021-06-05 04:08:13,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512545159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:13,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168840293] [2021-06-05 04:08:13,793 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 04:08:13,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:08:13,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:13,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:13,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:13,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168840293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:13,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:13,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:08:13,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800256906] [2021-06-05 04:08:13,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:13,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:13,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:13,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:13,883 INFO L87 Difference]: Start difference. First operand 13534 states and 41365 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 04:08:14,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:14,172 INFO L93 Difference]: Finished difference Result 19456 states and 59104 transitions. [2021-06-05 04:08:14,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:08:14,173 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 04:08:14,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:14,206 INFO L225 Difference]: With dead ends: 19456 [2021-06-05 04:08:14,206 INFO L226 Difference]: Without dead ends: 19456 [2021-06-05 04:08:14,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 213.2ms TimeCoverageRelationStatistics Valid=411, Invalid=779, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:08:14,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19456 states. [2021-06-05 04:08:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19456 to 17545. [2021-06-05 04:08:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17545 states, 17544 states have (on average 3.0747264021887823) internal successors, (53943), 17544 states have internal predecessors, (53943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:14,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17545 states to 17545 states and 53943 transitions. [2021-06-05 04:08:14,472 INFO L78 Accepts]: Start accepts. Automaton has 17545 states and 53943 transitions. Word has length 22 [2021-06-05 04:08:14,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:14,472 INFO L482 AbstractCegarLoop]: Abstraction has 17545 states and 53943 transitions. [2021-06-05 04:08:14,472 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 04:08:14,473 INFO L276 IsEmpty]: Start isEmpty. Operand 17545 states and 53943 transitions. [2021-06-05 04:08:14,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:14,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:14,482 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:14,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9893 [2021-06-05 04:08:14,682 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:14,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:14,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1491148885, now seen corresponding path program 184 times [2021-06-05 04:08:14,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:14,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102684666] [2021-06-05 04:08:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:14,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:14,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102684666] [2021-06-05 04:08:14,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102684666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:14,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458121166] [2021-06-05 04:08:14,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:08:14,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:14,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:14,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:14,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:14,814 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 04:08:14,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458121166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:14,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:14,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:08:14,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468755324] [2021-06-05 04:08:14,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:14,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:14,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:14,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:14,815 INFO L87 Difference]: Start difference. First operand 17545 states and 53943 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 04:08:15,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:15,050 INFO L93 Difference]: Finished difference Result 24132 states and 73287 transitions. [2021-06-05 04:08:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:08:15,051 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 04:08:15,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:15,086 INFO L225 Difference]: With dead ends: 24132 [2021-06-05 04:08:15,086 INFO L226 Difference]: Without dead ends: 24132 [2021-06-05 04:08:15,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 157.7ms TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:08:15,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24132 states. [2021-06-05 04:08:15,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24132 to 13806. [2021-06-05 04:08:15,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13806 states, 13805 states have (on average 3.0678739587106123) internal successors, (42352), 13805 states have internal predecessors, (42352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:15,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13806 states to 13806 states and 42352 transitions. [2021-06-05 04:08:15,365 INFO L78 Accepts]: Start accepts. Automaton has 13806 states and 42352 transitions. Word has length 22 [2021-06-05 04:08:15,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:15,365 INFO L482 AbstractCegarLoop]: Abstraction has 13806 states and 42352 transitions. [2021-06-05 04:08:15,365 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 04:08:15,366 INFO L276 IsEmpty]: Start isEmpty. Operand 13806 states and 42352 transitions. [2021-06-05 04:08:15,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:15,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:15,374 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:15,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9894,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:15,574 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:15,574 INFO L82 PathProgramCache]: Analyzing trace with hash 223691707, now seen corresponding path program 185 times [2021-06-05 04:08:15,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:15,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273865652] [2021-06-05 04:08:15,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:15,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:15,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273865652] [2021-06-05 04:08:15,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273865652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:15,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231404592] [2021-06-05 04:08:15,640 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 04:08:15,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:08:15,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:15,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:15,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:15,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231404592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:15,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:15,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:08:15,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584143196] [2021-06-05 04:08:15,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:15,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:15,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:15,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:15,707 INFO L87 Difference]: Start difference. First operand 13806 states and 42352 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 04:08:15,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:15,929 INFO L93 Difference]: Finished difference Result 20948 states and 63957 transitions. [2021-06-05 04:08:15,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:08:15,929 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 04:08:15,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:15,964 INFO L225 Difference]: With dead ends: 20948 [2021-06-05 04:08:15,964 INFO L226 Difference]: Without dead ends: 20948 [2021-06-05 04:08:15,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:08:15,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20948 states. [2021-06-05 04:08:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20948 to 19052. [2021-06-05 04:08:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19052 states, 19051 states have (on average 3.0863996640596296) internal successors, (58799), 19051 states have internal predecessors, (58799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:16,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19052 states to 19052 states and 58799 transitions. [2021-06-05 04:08:16,309 INFO L78 Accepts]: Start accepts. Automaton has 19052 states and 58799 transitions. Word has length 22 [2021-06-05 04:08:16,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:16,310 INFO L482 AbstractCegarLoop]: Abstraction has 19052 states and 58799 transitions. [2021-06-05 04:08:16,310 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 04:08:16,310 INFO L276 IsEmpty]: Start isEmpty. Operand 19052 states and 58799 transitions. [2021-06-05 04:08:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:16,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:16,319 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:16,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9895 [2021-06-05 04:08:16,520 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:16,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:16,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1706826645, now seen corresponding path program 186 times [2021-06-05 04:08:16,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:16,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941887416] [2021-06-05 04:08:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:16,602 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 04:08:16,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:16,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941887416] [2021-06-05 04:08:16,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941887416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:16,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003042450] [2021-06-05 04:08:16,602 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 04:08:16,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:08:16,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:16,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:16,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:16,680 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 04:08:16,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003042450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:16,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:16,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:08:16,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634464909] [2021-06-05 04:08:16,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:16,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:16,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:16,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:16,681 INFO L87 Difference]: Start difference. First operand 19052 states and 58799 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 04:08:17,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:17,033 INFO L93 Difference]: Finished difference Result 28543 states and 87595 transitions. [2021-06-05 04:08:17,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:08:17,033 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 04:08:17,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:17,077 INFO L225 Difference]: With dead ends: 28543 [2021-06-05 04:08:17,077 INFO L226 Difference]: Without dead ends: 28543 [2021-06-05 04:08:17,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=410, Invalid=780, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:08:17,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28543 states. [2021-06-05 04:08:17,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28543 to 26854. [2021-06-05 04:08:17,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26854 states, 26853 states have (on average 3.0954455740513165) internal successors, (83122), 26853 states have internal predecessors, (83122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:17,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26854 states to 26854 states and 83122 transitions. [2021-06-05 04:08:17,501 INFO L78 Accepts]: Start accepts. Automaton has 26854 states and 83122 transitions. Word has length 22 [2021-06-05 04:08:17,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:17,501 INFO L482 AbstractCegarLoop]: Abstraction has 26854 states and 83122 transitions. [2021-06-05 04:08:17,501 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 04:08:17,501 INFO L276 IsEmpty]: Start isEmpty. Operand 26854 states and 83122 transitions. [2021-06-05 04:08:17,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:17,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:17,511 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:17,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9896 [2021-06-05 04:08:17,711 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:17,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:17,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1627873617, now seen corresponding path program 187 times [2021-06-05 04:08:17,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:17,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87057789] [2021-06-05 04:08:17,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:17,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:17,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87057789] [2021-06-05 04:08:17,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87057789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:17,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83898954] [2021-06-05 04:08:17,763 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 04:08:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:17,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:17,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:17,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83898954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:17,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:17,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:08:17,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875837500] [2021-06-05 04:08:17,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:08:17,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:17,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:08:17,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:08:17,822 INFO L87 Difference]: Start difference. First operand 26854 states and 83122 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 04:08:18,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:18,041 INFO L93 Difference]: Finished difference Result 27245 states and 83974 transitions. [2021-06-05 04:08:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:08:18,042 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 04:08:18,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:18,097 INFO L225 Difference]: With dead ends: 27245 [2021-06-05 04:08:18,097 INFO L226 Difference]: Without dead ends: 27241 [2021-06-05 04:08:18,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=204, Invalid=348, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:08:18,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27241 states. [2021-06-05 04:08:18,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27241 to 25289. [2021-06-05 04:08:18,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25289 states, 25288 states have (on average 3.0879863967099017) internal successors, (78089), 25288 states have internal predecessors, (78089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:18,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25289 states to 25289 states and 78089 transitions. [2021-06-05 04:08:18,584 INFO L78 Accepts]: Start accepts. Automaton has 25289 states and 78089 transitions. Word has length 22 [2021-06-05 04:08:18,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:18,584 INFO L482 AbstractCegarLoop]: Abstraction has 25289 states and 78089 transitions. [2021-06-05 04:08:18,584 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 04:08:18,584 INFO L276 IsEmpty]: Start isEmpty. Operand 25289 states and 78089 transitions. [2021-06-05 04:08:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:18,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:18,593 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:18,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9897,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:18,795 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:18,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:18,795 INFO L82 PathProgramCache]: Analyzing trace with hash -949344619, now seen corresponding path program 188 times [2021-06-05 04:08:18,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:18,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262756869] [2021-06-05 04:08:18,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:18,848 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 04:08:18,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:18,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262756869] [2021-06-05 04:08:18,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262756869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:18,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457151412] [2021-06-05 04:08:18,848 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 04:08:18,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:18,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:18,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:18,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:18,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457151412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:18,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:18,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:08:18,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342421676] [2021-06-05 04:08:18,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:08:18,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:18,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:08:18,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:08:18,910 INFO L87 Difference]: Start difference. First operand 25289 states and 78089 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 04:08:19,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:19,057 INFO L93 Difference]: Finished difference Result 27144 states and 83198 transitions. [2021-06-05 04:08:19,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:08:19,058 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 04:08:19,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:19,099 INFO L225 Difference]: With dead ends: 27144 [2021-06-05 04:08:19,099 INFO L226 Difference]: Without dead ends: 27144 [2021-06-05 04:08:19,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:08:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27144 states. [2021-06-05 04:08:19,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27144 to 25336. [2021-06-05 04:08:19,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25336 states, 25335 states have (on average 3.08656009473061) internal successors, (78198), 25335 states have internal predecessors, (78198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:19,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25336 states to 25336 states and 78198 transitions. [2021-06-05 04:08:19,566 INFO L78 Accepts]: Start accepts. Automaton has 25336 states and 78198 transitions. Word has length 22 [2021-06-05 04:08:19,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:19,566 INFO L482 AbstractCegarLoop]: Abstraction has 25336 states and 78198 transitions. [2021-06-05 04:08:19,566 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 04:08:19,566 INFO L276 IsEmpty]: Start isEmpty. Operand 25336 states and 78198 transitions. [2021-06-05 04:08:19,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:19,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:19,576 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:19,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9898 [2021-06-05 04:08:19,789 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:19,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:19,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1616575343, now seen corresponding path program 189 times [2021-06-05 04:08:19,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:19,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242172076] [2021-06-05 04:08:19,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:19,844 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:19,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:19,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242172076] [2021-06-05 04:08:19,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242172076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:19,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063699806] [2021-06-05 04:08:19,845 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 04:08:19,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:08:19,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:19,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:19,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:19,912 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 04:08:19,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063699806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:19,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:19,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:08:19,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718751854] [2021-06-05 04:08:19,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:19,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:19,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:19,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:19,913 INFO L87 Difference]: Start difference. First operand 25336 states and 78198 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 04:08:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:20,086 INFO L93 Difference]: Finished difference Result 28314 states and 86669 transitions. [2021-06-05 04:08:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:08:20,087 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 04:08:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:20,132 INFO L225 Difference]: With dead ends: 28314 [2021-06-05 04:08:20,132 INFO L226 Difference]: Without dead ends: 28314 [2021-06-05 04:08:20,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:20,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28314 states. [2021-06-05 04:08:20,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28314 to 22217. [2021-06-05 04:08:20,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22217 states, 22216 states have (on average 3.076026287360461) internal successors, (68337), 22216 states have internal predecessors, (68337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:20,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22217 states to 22217 states and 68337 transitions. [2021-06-05 04:08:20,655 INFO L78 Accepts]: Start accepts. Automaton has 22217 states and 68337 transitions. Word has length 22 [2021-06-05 04:08:20,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:20,655 INFO L482 AbstractCegarLoop]: Abstraction has 22217 states and 68337 transitions. [2021-06-05 04:08:20,655 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 04:08:20,655 INFO L276 IsEmpty]: Start isEmpty. Operand 22217 states and 68337 transitions. [2021-06-05 04:08:20,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:20,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:20,665 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:20,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9899,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:20,865 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:20,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:20,866 INFO L82 PathProgramCache]: Analyzing trace with hash -444284459, now seen corresponding path program 190 times [2021-06-05 04:08:20,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:20,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018057970] [2021-06-05 04:08:20,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:20,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:20,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018057970] [2021-06-05 04:08:20,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018057970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:20,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500381561] [2021-06-05 04:08:20,925 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 04:08:20,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:20,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:20,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:20,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:20,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500381561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:20,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:20,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:08:20,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082543849] [2021-06-05 04:08:20,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:20,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:20,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:20,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:20,993 INFO L87 Difference]: Start difference. First operand 22217 states and 68337 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 04:08:21,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:21,202 INFO L93 Difference]: Finished difference Result 40934 states and 126275 transitions. [2021-06-05 04:08:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:08:21,203 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 04:08:21,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:21,286 INFO L225 Difference]: With dead ends: 40934 [2021-06-05 04:08:21,286 INFO L226 Difference]: Without dead ends: 40934 [2021-06-05 04:08:21,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:21,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40934 states. [2021-06-05 04:08:21,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40934 to 32281. [2021-06-05 04:08:21,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32281 states, 32280 states have (on average 3.1012391573729863) internal successors, (100108), 32280 states have internal predecessors, (100108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:21,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32281 states to 32281 states and 100108 transitions. [2021-06-05 04:08:21,962 INFO L78 Accepts]: Start accepts. Automaton has 32281 states and 100108 transitions. Word has length 22 [2021-06-05 04:08:21,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:21,962 INFO L482 AbstractCegarLoop]: Abstraction has 32281 states and 100108 transitions. [2021-06-05 04:08:21,962 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 04:08:21,962 INFO L276 IsEmpty]: Start isEmpty. Operand 32281 states and 100108 transitions. [2021-06-05 04:08:21,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:21,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:21,972 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:22,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9900,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:22,173 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:22,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:22,173 INFO L82 PathProgramCache]: Analyzing trace with hash 93571119, now seen corresponding path program 191 times [2021-06-05 04:08:22,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:22,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416555023] [2021-06-05 04:08:22,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:22,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:22,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416555023] [2021-06-05 04:08:22,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416555023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:22,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568075483] [2021-06-05 04:08:22,233 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 04:08:22,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:08:22,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:22,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:22,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:22,304 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 04:08:22,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568075483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:22,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:22,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:08:22,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148823850] [2021-06-05 04:08:22,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:22,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:22,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:22,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:22,305 INFO L87 Difference]: Start difference. First operand 32281 states and 100108 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 04:08:22,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:22,500 INFO L93 Difference]: Finished difference Result 45762 states and 141598 transitions. [2021-06-05 04:08:22,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:08:22,501 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 04:08:22,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:22,579 INFO L225 Difference]: With dead ends: 45762 [2021-06-05 04:08:22,579 INFO L226 Difference]: Without dead ends: 45762 [2021-06-05 04:08:22,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:08:22,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45762 states. [2021-06-05 04:08:23,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45762 to 45505. [2021-06-05 04:08:23,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45505 states, 45504 states have (on average 3.1023426511954995) internal successors, (141169), 45504 states have internal predecessors, (141169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45505 states to 45505 states and 141169 transitions. [2021-06-05 04:08:23,730 INFO L78 Accepts]: Start accepts. Automaton has 45505 states and 141169 transitions. Word has length 22 [2021-06-05 04:08:23,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:23,730 INFO L482 AbstractCegarLoop]: Abstraction has 45505 states and 141169 transitions. [2021-06-05 04:08:23,730 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 04:08:23,730 INFO L276 IsEmpty]: Start isEmpty. Operand 45505 states and 141169 transitions. [2021-06-05 04:08:23,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:23,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:23,747 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:23,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9901,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:23,947 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:23,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:23,947 INFO L82 PathProgramCache]: Analyzing trace with hash -412775147, now seen corresponding path program 192 times [2021-06-05 04:08:23,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:23,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704330809] [2021-06-05 04:08:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:24,236 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 04:08:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:24,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:24,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704330809] [2021-06-05 04:08:24,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704330809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:24,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100407085] [2021-06-05 04:08:24,246 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 04:08:24,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:08:24,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:24,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:24,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:24,310 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 04:08:24,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100407085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:24,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:24,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:08:24,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445543159] [2021-06-05 04:08:24,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:24,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:24,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:24,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:24,311 INFO L87 Difference]: Start difference. First operand 45505 states and 141169 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 04:08:24,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:24,645 INFO L93 Difference]: Finished difference Result 46432 states and 143526 transitions. [2021-06-05 04:08:24,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:08:24,646 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 04:08:24,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:24,748 INFO L225 Difference]: With dead ends: 46432 [2021-06-05 04:08:24,748 INFO L226 Difference]: Without dead ends: 46432 [2021-06-05 04:08:24,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 351.5ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:08:24,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46432 states. [2021-06-05 04:08:25,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46432 to 45128. [2021-06-05 04:08:25,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45128 states, 45127 states have (on average 3.1029317260176836) internal successors, (140026), 45127 states have internal predecessors, (140026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45128 states to 45128 states and 140026 transitions. [2021-06-05 04:08:25,713 INFO L78 Accepts]: Start accepts. Automaton has 45128 states and 140026 transitions. Word has length 22 [2021-06-05 04:08:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:25,713 INFO L482 AbstractCegarLoop]: Abstraction has 45128 states and 140026 transitions. [2021-06-05 04:08:25,713 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 04:08:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 45128 states and 140026 transitions. [2021-06-05 04:08:25,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:25,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:25,728 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:25,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9902,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:25,928 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:25,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:25,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1070359791, now seen corresponding path program 193 times [2021-06-05 04:08:25,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:25,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649397892] [2021-06-05 04:08:25,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:26,143 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 04:08:26,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:26,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649397892] [2021-06-05 04:08:26,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649397892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:26,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606309615] [2021-06-05 04:08:26,143 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 04:08:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:26,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:26,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:26,206 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 04:08:26,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606309615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:26,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:26,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:08:26,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255965370] [2021-06-05 04:08:26,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:26,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:26,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:26,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:26,207 INFO L87 Difference]: Start difference. First operand 45128 states and 140026 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 04:08:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:26,656 INFO L93 Difference]: Finished difference Result 49791 states and 153978 transitions. [2021-06-05 04:08:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:08:26,657 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 04:08:26,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:26,756 INFO L225 Difference]: With dead ends: 49791 [2021-06-05 04:08:26,756 INFO L226 Difference]: Without dead ends: 49791 [2021-06-05 04:08:26,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 310.0ms TimeCoverageRelationStatistics Valid=285, Invalid=585, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:08:26,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49791 states. [2021-06-05 04:08:27,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49791 to 49280. [2021-06-05 04:08:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49280 states, 49279 states have (on average 3.102295095273849) internal successors, (152878), 49279 states have internal predecessors, (152878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:27,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49280 states to 49280 states and 152878 transitions. [2021-06-05 04:08:27,800 INFO L78 Accepts]: Start accepts. Automaton has 49280 states and 152878 transitions. Word has length 22 [2021-06-05 04:08:27,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:27,800 INFO L482 AbstractCegarLoop]: Abstraction has 49280 states and 152878 transitions. [2021-06-05 04:08:27,800 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 04:08:27,800 INFO L276 IsEmpty]: Start isEmpty. Operand 49280 states and 152878 transitions. [2021-06-05 04:08:27,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:27,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:27,815 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:28,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9903 [2021-06-05 04:08:28,016 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:28,016 INFO L82 PathProgramCache]: Analyzing trace with hash -197097387, now seen corresponding path program 194 times [2021-06-05 04:08:28,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:28,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143771690] [2021-06-05 04:08:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:28,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:28,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143771690] [2021-06-05 04:08:28,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143771690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:28,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764175074] [2021-06-05 04:08:28,114 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 04:08:28,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:28,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:28,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:28,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:28,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764175074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:28,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:28,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:08:28,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538935816] [2021-06-05 04:08:28,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:28,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:28,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:28,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:28,202 INFO L87 Difference]: Start difference. First operand 49280 states and 152878 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 04:08:28,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:28,809 INFO L93 Difference]: Finished difference Result 52302 states and 161626 transitions. [2021-06-05 04:08:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:08:28,821 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 04:08:28,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:28,929 INFO L225 Difference]: With dead ends: 52302 [2021-06-05 04:08:28,929 INFO L226 Difference]: Without dead ends: 52302 [2021-06-05 04:08:28,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 442.2ms TimeCoverageRelationStatistics Valid=525, Invalid=1035, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:08:28,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52302 states. [2021-06-05 04:08:29,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52302 to 51634. [2021-06-05 04:08:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51634 states, 51633 states have (on average 3.101311176960471) internal successors, (160130), 51633 states have internal predecessors, (160130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:30,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51634 states to 51634 states and 160130 transitions. [2021-06-05 04:08:30,181 INFO L78 Accepts]: Start accepts. Automaton has 51634 states and 160130 transitions. Word has length 22 [2021-06-05 04:08:30,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:30,181 INFO L482 AbstractCegarLoop]: Abstraction has 51634 states and 160130 transitions. [2021-06-05 04:08:30,181 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 04:08:30,182 INFO L276 IsEmpty]: Start isEmpty. Operand 51634 states and 160130 transitions. [2021-06-05 04:08:30,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:30,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:30,197 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:30,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9904,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:30,398 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:30,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:30,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1546669833, now seen corresponding path program 195 times [2021-06-05 04:08:30,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:30,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302974546] [2021-06-05 04:08:30,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:30,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:30,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302974546] [2021-06-05 04:08:30,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302974546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:30,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118975294] [2021-06-05 04:08:30,463 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 04:08:30,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:08:30,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:30,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:30,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:08:30,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118975294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:30,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:30,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:08:30,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966011920] [2021-06-05 04:08:30,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:08:30,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:30,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:08:30,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:08:30,529 INFO L87 Difference]: Start difference. First operand 51634 states and 160130 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 04:08:30,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:30,951 INFO L93 Difference]: Finished difference Result 52382 states and 162119 transitions. [2021-06-05 04:08:30,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:08:30,952 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 22 [2021-06-05 04:08:30,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:31,326 INFO L225 Difference]: With dead ends: 52382 [2021-06-05 04:08:31,326 INFO L226 Difference]: Without dead ends: 52376 [2021-06-05 04:08:31,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 161.1ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:08:31,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52376 states. [2021-06-05 04:08:32,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52376 to 52177. [2021-06-05 04:08:32,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52177 states, 52176 states have (on average 3.102135081263416) internal successors, (161857), 52176 states have internal predecessors, (161857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:32,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52177 states to 52177 states and 161857 transitions. [2021-06-05 04:08:32,281 INFO L78 Accepts]: Start accepts. Automaton has 52177 states and 161857 transitions. Word has length 22 [2021-06-05 04:08:32,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:32,281 INFO L482 AbstractCegarLoop]: Abstraction has 52177 states and 161857 transitions. [2021-06-05 04:08:32,281 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 04:08:32,281 INFO L276 IsEmpty]: Start isEmpty. Operand 52177 states and 161857 transitions. [2021-06-05 04:08:32,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:32,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:32,297 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:32,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9905 [2021-06-05 04:08:32,497 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:32,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:32,497 INFO L82 PathProgramCache]: Analyzing trace with hash 471577549, now seen corresponding path program 196 times [2021-06-05 04:08:32,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:32,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999886205] [2021-06-05 04:08:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:32,756 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 04:08:32,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:32,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999886205] [2021-06-05 04:08:32,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999886205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:32,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5299852] [2021-06-05 04:08:32,756 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 04:08:32,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:32,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:32,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:32,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:08:32,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5299852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:32,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:32,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:08:32,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675789446] [2021-06-05 04:08:32,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:08:32,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:32,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:08:32,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:08:32,856 INFO L87 Difference]: Start difference. First operand 52177 states and 161857 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 04:08:33,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:33,212 INFO L93 Difference]: Finished difference Result 71897 states and 222309 transitions. [2021-06-05 04:08:33,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:08:33,212 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 04:08:33,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:33,351 INFO L225 Difference]: With dead ends: 71897 [2021-06-05 04:08:33,351 INFO L226 Difference]: Without dead ends: 71897 [2021-06-05 04:08:33,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:08:33,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71897 states. [2021-06-05 04:08:34,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71897 to 70150. [2021-06-05 04:08:34,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70150 states, 70149 states have (on average 3.098347802534605) internal successors, (217346), 70149 states have internal predecessors, (217346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:34,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70150 states to 70150 states and 217346 transitions. [2021-06-05 04:08:34,959 INFO L78 Accepts]: Start accepts. Automaton has 70150 states and 217346 transitions. Word has length 22 [2021-06-05 04:08:34,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:34,959 INFO L482 AbstractCegarLoop]: Abstraction has 70150 states and 217346 transitions. [2021-06-05 04:08:34,959 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 04:08:34,959 INFO L276 IsEmpty]: Start isEmpty. Operand 70150 states and 217346 transitions. [2021-06-05 04:08:34,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:34,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:34,976 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:35,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9906,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:35,176 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:35,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:35,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1009433127, now seen corresponding path program 197 times [2021-06-05 04:08:35,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:35,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351978344] [2021-06-05 04:08:35,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:35,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:35,240 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 04:08:35,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:35,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351978344] [2021-06-05 04:08:35,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351978344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:35,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405641154] [2021-06-05 04:08:35,240 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 04:08:35,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:08:35,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:35,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:35,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:35,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405641154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:35,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:35,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:08:35,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044087325] [2021-06-05 04:08:35,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:35,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:35,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:35,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:35,305 INFO L87 Difference]: Start difference. First operand 70150 states and 217346 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 04:08:36,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:36,069 INFO L93 Difference]: Finished difference Result 81568 states and 251022 transitions. [2021-06-05 04:08:36,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:08:36,070 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 04:08:36,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:36,254 INFO L225 Difference]: With dead ends: 81568 [2021-06-05 04:08:36,254 INFO L226 Difference]: Without dead ends: 81568 [2021-06-05 04:08:36,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:08:36,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81568 states. [2021-06-05 04:08:37,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81568 to 71366. [2021-06-05 04:08:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71366 states, 71365 states have (on average 3.0934491697610875) internal successors, (220764), 71365 states have internal predecessors, (220764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:38,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71366 states to 71366 states and 220764 transitions. [2021-06-05 04:08:38,026 INFO L78 Accepts]: Start accepts. Automaton has 71366 states and 220764 transitions. Word has length 22 [2021-06-05 04:08:38,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:38,026 INFO L482 AbstractCegarLoop]: Abstraction has 71366 states and 220764 transitions. [2021-06-05 04:08:38,026 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 04:08:38,026 INFO L276 IsEmpty]: Start isEmpty. Operand 71366 states and 220764 transitions. [2021-06-05 04:08:38,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:38,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:38,044 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:38,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9907,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:38,245 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:38,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:38,245 INFO L82 PathProgramCache]: Analyzing trace with hash 503086861, now seen corresponding path program 198 times [2021-06-05 04:08:38,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:38,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640580210] [2021-06-05 04:08:38,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:38,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:38,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640580210] [2021-06-05 04:08:38,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640580210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:38,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151425605] [2021-06-05 04:08:38,315 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 04:08:38,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:08:38,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:38,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:38,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:38,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151425605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:38,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:38,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:08:38,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609003991] [2021-06-05 04:08:38,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:38,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:38,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:38,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:38,385 INFO L87 Difference]: Start difference. First operand 71366 states and 220764 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 04:08:38,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:38,966 INFO L93 Difference]: Finished difference Result 104720 states and 323372 transitions. [2021-06-05 04:08:38,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:08:38,967 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 04:08:38,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:39,218 INFO L225 Difference]: With dead ends: 104720 [2021-06-05 04:08:39,218 INFO L226 Difference]: Without dead ends: 104720 [2021-06-05 04:08:39,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:08:39,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104720 states. [2021-06-05 04:08:41,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104720 to 99727. [2021-06-05 04:08:41,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99727 states, 99726 states have (on average 3.0966046968694223) internal successors, (308812), 99726 states have internal predecessors, (308812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99727 states to 99727 states and 308812 transitions. [2021-06-05 04:08:41,886 INFO L78 Accepts]: Start accepts. Automaton has 99727 states and 308812 transitions. Word has length 22 [2021-06-05 04:08:41,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:41,886 INFO L482 AbstractCegarLoop]: Abstraction has 99727 states and 308812 transitions. [2021-06-05 04:08:41,886 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 04:08:41,886 INFO L276 IsEmpty]: Start isEmpty. Operand 99727 states and 308812 transitions. [2021-06-05 04:08:41,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:41,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:41,905 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:42,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9908 [2021-06-05 04:08:42,106 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:42,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:42,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1986221799, now seen corresponding path program 199 times [2021-06-05 04:08:42,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:42,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370505948] [2021-06-05 04:08:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:42,172 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 04:08:42,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:42,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370505948] [2021-06-05 04:08:42,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370505948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:42,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201745373] [2021-06-05 04:08:42,172 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 04:08:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:42,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:42,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:42,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201745373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:42,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:42,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:08:42,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301405900] [2021-06-05 04:08:42,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:42,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:42,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:42,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:42,236 INFO L87 Difference]: Start difference. First operand 99727 states and 308812 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 04:08:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:42,883 INFO L93 Difference]: Finished difference Result 122524 states and 378377 transitions. [2021-06-05 04:08:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:08:42,883 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 04:08:42,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:43,561 INFO L225 Difference]: With dead ends: 122524 [2021-06-05 04:08:43,561 INFO L226 Difference]: Without dead ends: 122524 [2021-06-05 04:08:43,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=382, Invalid=740, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:08:43,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122524 states. [2021-06-05 04:08:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122524 to 119170. [2021-06-05 04:08:45,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119170 states, 119169 states have (on average 3.0954358935629234) internal successors, (368880), 119169 states have internal predecessors, (368880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:46,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119170 states to 119170 states and 368880 transitions. [2021-06-05 04:08:46,135 INFO L78 Accepts]: Start accepts. Automaton has 119170 states and 368880 transitions. Word has length 22 [2021-06-05 04:08:46,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:46,135 INFO L482 AbstractCegarLoop]: Abstraction has 119170 states and 368880 transitions. [2021-06-05 04:08:46,135 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 04:08:46,135 INFO L276 IsEmpty]: Start isEmpty. Operand 119170 states and 368880 transitions. [2021-06-05 04:08:46,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:46,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:46,157 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:46,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9909,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:46,358 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:46,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:46,358 INFO L82 PathProgramCache]: Analyzing trace with hash -2047516429, now seen corresponding path program 200 times [2021-06-05 04:08:46,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:46,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041060300] [2021-06-05 04:08:46,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:46,425 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 04:08:46,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:46,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041060300] [2021-06-05 04:08:46,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041060300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:46,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476206967] [2021-06-05 04:08:46,425 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 04:08:46,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:46,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:46,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:46,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:46,487 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:46,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476206967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:46,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:46,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:08:46,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950755013] [2021-06-05 04:08:46,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:46,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:46,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:46,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:46,488 INFO L87 Difference]: Start difference. First operand 119170 states and 368880 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 04:08:47,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:47,603 INFO L93 Difference]: Finished difference Result 149360 states and 458856 transitions. [2021-06-05 04:08:47,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:08:47,603 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 04:08:47,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:47,977 INFO L225 Difference]: With dead ends: 149360 [2021-06-05 04:08:47,977 INFO L226 Difference]: Without dead ends: 149360 [2021-06-05 04:08:47,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=265, Invalid=491, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:08:48,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149360 states. [2021-06-05 04:08:50,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149360 to 66855. [2021-06-05 04:08:50,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66855 states, 66854 states have (on average 3.0857241152361863) internal successors, (206293), 66854 states have internal predecessors, (206293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:50,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66855 states to 66855 states and 206293 transitions. [2021-06-05 04:08:50,417 INFO L78 Accepts]: Start accepts. Automaton has 66855 states and 206293 transitions. Word has length 22 [2021-06-05 04:08:50,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:50,417 INFO L482 AbstractCegarLoop]: Abstraction has 66855 states and 206293 transitions. [2021-06-05 04:08:50,417 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 04:08:50,417 INFO L276 IsEmpty]: Start isEmpty. Operand 66855 states and 206293 transitions. [2021-06-05 04:08:50,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:50,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:50,436 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:50,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9910,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:50,636 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:50,636 INFO L82 PathProgramCache]: Analyzing trace with hash -564381491, now seen corresponding path program 201 times [2021-06-05 04:08:50,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:50,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002570555] [2021-06-05 04:08:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:50,719 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 04:08:50,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:50,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002570555] [2021-06-05 04:08:50,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002570555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:50,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048462888] [2021-06-05 04:08:50,720 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 04:08:50,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:08:50,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:50,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:50,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:50,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048462888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:50,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:50,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:08:50,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261413290] [2021-06-05 04:08:50,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:50,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:50,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:50,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:50,785 INFO L87 Difference]: Start difference. First operand 66855 states and 206293 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 04:08:51,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:51,290 INFO L93 Difference]: Finished difference Result 89497 states and 274720 transitions. [2021-06-05 04:08:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:08:51,291 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 04:08:51,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:51,453 INFO L225 Difference]: With dead ends: 89497 [2021-06-05 04:08:51,453 INFO L226 Difference]: Without dead ends: 89497 [2021-06-05 04:08:51,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=409, Invalid=781, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:08:51,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89497 states. [2021-06-05 04:08:52,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89497 to 43123. [2021-06-05 04:08:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43123 states, 43122 states have (on average 3.0917397152265664) internal successors, (133322), 43122 states have internal predecessors, (133322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43123 states to 43123 states and 133322 transitions. [2021-06-05 04:08:53,174 INFO L78 Accepts]: Start accepts. Automaton has 43123 states and 133322 transitions. Word has length 22 [2021-06-05 04:08:53,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:53,175 INFO L482 AbstractCegarLoop]: Abstraction has 43123 states and 133322 transitions. [2021-06-05 04:08:53,175 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 04:08:53,175 INFO L276 IsEmpty]: Start isEmpty. Operand 43123 states and 133322 transitions. [2021-06-05 04:08:53,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:53,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:53,185 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:53,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9911,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:53,386 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:53,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:53,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1579474701, now seen corresponding path program 202 times [2021-06-05 04:08:53,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:53,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899716837] [2021-06-05 04:08:53,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:53,445 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 04:08:53,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:53,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899716837] [2021-06-05 04:08:53,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899716837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:53,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563523973] [2021-06-05 04:08:53,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:08:53,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:53,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:53,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:53,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:53,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563523973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:53,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:53,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:08:53,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545891218] [2021-06-05 04:08:53,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:53,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:53,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:53,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:53,509 INFO L87 Difference]: Start difference. First operand 43123 states and 133322 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 04:08:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:53,727 INFO L93 Difference]: Finished difference Result 46015 states and 141473 transitions. [2021-06-05 04:08:53,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:08:53,727 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 04:08:53,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:53,803 INFO L225 Difference]: With dead ends: 46015 [2021-06-05 04:08:53,803 INFO L226 Difference]: Without dead ends: 46015 [2021-06-05 04:08:53,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:53,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46015 states. [2021-06-05 04:08:54,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46015 to 33259. [2021-06-05 04:08:54,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33259 states, 33258 states have (on average 3.08671597811053) internal successors, (102658), 33258 states have internal predecessors, (102658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:54,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33259 states to 33259 states and 102658 transitions. [2021-06-05 04:08:54,695 INFO L78 Accepts]: Start accepts. Automaton has 33259 states and 102658 transitions. Word has length 22 [2021-06-05 04:08:54,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:54,695 INFO L482 AbstractCegarLoop]: Abstraction has 33259 states and 102658 transitions. [2021-06-05 04:08:54,695 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 04:08:54,695 INFO L276 IsEmpty]: Start isEmpty. Operand 33259 states and 102658 transitions. [2021-06-05 04:08:54,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:54,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:54,705 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:54,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9912,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:54,905 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:54,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:54,906 INFO L82 PathProgramCache]: Analyzing trace with hash 2117330279, now seen corresponding path program 203 times [2021-06-05 04:08:54,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:54,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479354933] [2021-06-05 04:08:54,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:54,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:54,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479354933] [2021-06-05 04:08:54,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479354933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:54,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977039736] [2021-06-05 04:08:54,973 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 04:08:54,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:08:55,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:55,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:55,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:55,043 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 04:08:55,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977039736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:55,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:55,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:08:55,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310421226] [2021-06-05 04:08:55,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:08:55,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:55,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:08:55,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:08:55,044 INFO L87 Difference]: Start difference. First operand 33259 states and 102658 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 04:08:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:55,243 INFO L93 Difference]: Finished difference Result 35745 states and 109875 transitions. [2021-06-05 04:08:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:08:55,243 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 04:08:55,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:55,306 INFO L225 Difference]: With dead ends: 35745 [2021-06-05 04:08:55,307 INFO L226 Difference]: Without dead ends: 35745 [2021-06-05 04:08:55,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:08:55,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35745 states. [2021-06-05 04:08:55,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35745 to 35523. [2021-06-05 04:08:55,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35523 states, 35522 states have (on average 3.083694611789877) internal successors, (109539), 35522 states have internal predecessors, (109539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:56,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35523 states to 35523 states and 109539 transitions. [2021-06-05 04:08:56,283 INFO L78 Accepts]: Start accepts. Automaton has 35523 states and 109539 transitions. Word has length 22 [2021-06-05 04:08:56,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:56,283 INFO L482 AbstractCegarLoop]: Abstraction has 35523 states and 109539 transitions. [2021-06-05 04:08:56,283 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 04:08:56,283 INFO L276 IsEmpty]: Start isEmpty. Operand 35523 states and 109539 transitions. [2021-06-05 04:08:56,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:56,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:56,292 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:56,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9913,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:56,493 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:56,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:56,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1610984013, now seen corresponding path program 204 times [2021-06-05 04:08:56,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:56,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461583537] [2021-06-05 04:08:56,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:56,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:56,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461583537] [2021-06-05 04:08:56,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461583537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:56,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746705102] [2021-06-05 04:08:56,562 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 04:08:56,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:08:56,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:56,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:56,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:56,626 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 04:08:56,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746705102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:56,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:56,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:08:56,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901327319] [2021-06-05 04:08:56,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:56,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:56,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:56,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:56,627 INFO L87 Difference]: Start difference. First operand 35523 states and 109539 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 04:08:56,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:56,849 INFO L93 Difference]: Finished difference Result 36167 states and 111049 transitions. [2021-06-05 04:08:56,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:08:56,849 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 04:08:56,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:56,910 INFO L225 Difference]: With dead ends: 36167 [2021-06-05 04:08:56,910 INFO L226 Difference]: Without dead ends: 36167 [2021-06-05 04:08:56,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:08:56,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36167 states. [2021-06-05 04:08:57,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36167 to 33964. [2021-06-05 04:08:57,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33964 states, 33963 states have (on average 3.083973736124606) internal successors, (104741), 33963 states have internal predecessors, (104741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33964 states to 33964 states and 104741 transitions. [2021-06-05 04:08:57,483 INFO L78 Accepts]: Start accepts. Automaton has 33964 states and 104741 transitions. Word has length 22 [2021-06-05 04:08:57,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:57,483 INFO L482 AbstractCegarLoop]: Abstraction has 33964 states and 104741 transitions. [2021-06-05 04:08:57,483 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 04:08:57,483 INFO L276 IsEmpty]: Start isEmpty. Operand 33964 states and 104741 transitions. [2021-06-05 04:08:57,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:57,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:57,722 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:57,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9914,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:57,923 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:57,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:57,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1200848345, now seen corresponding path program 205 times [2021-06-05 04:08:57,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:57,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748041916] [2021-06-05 04:08:57,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:57,994 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 04:08:57,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:57,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748041916] [2021-06-05 04:08:57,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748041916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:57,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202810966] [2021-06-05 04:08:57,994 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 04:08:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:58,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:58,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:58,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202810966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:58,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:58,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:08:58,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102783000] [2021-06-05 04:08:58,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:58,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:58,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:58,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:58,057 INFO L87 Difference]: Start difference. First operand 33964 states and 104741 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 04:08:58,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:58,315 INFO L93 Difference]: Finished difference Result 36419 states and 111773 transitions. [2021-06-05 04:08:58,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:08:58,316 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 04:08:58,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:58,373 INFO L225 Difference]: With dead ends: 36419 [2021-06-05 04:08:58,373 INFO L226 Difference]: Without dead ends: 36419 [2021-06-05 04:08:58,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=284, Invalid=586, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:08:58,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36419 states. [2021-06-05 04:08:58,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36419 to 34818. [2021-06-05 04:08:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34818 states, 34817 states have (on average 3.083206479593302) internal successors, (107348), 34817 states have internal predecessors, (107348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:58,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34818 states to 34818 states and 107348 transitions. [2021-06-05 04:08:58,951 INFO L78 Accepts]: Start accepts. Automaton has 34818 states and 107348 transitions. Word has length 22 [2021-06-05 04:08:58,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:58,951 INFO L482 AbstractCegarLoop]: Abstraction has 34818 states and 107348 transitions. [2021-06-05 04:08:58,951 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 04:08:58,951 INFO L276 IsEmpty]: Start isEmpty. Operand 34818 states and 107348 transitions. [2021-06-05 04:08:58,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:08:58,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:58,960 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:59,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9915 [2021-06-05 04:08:59,161 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:59,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:59,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1826661773, now seen corresponding path program 206 times [2021-06-05 04:08:59,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:59,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313565303] [2021-06-05 04:08:59,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:59,375 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-05 04:08:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:59,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:59,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313565303] [2021-06-05 04:08:59,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313565303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:59,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410211662] [2021-06-05 04:08:59,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:08:59,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:59,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:59,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:08:59,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:59,488 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 04:08:59,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410211662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:59,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:59,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:08:59,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140225276] [2021-06-05 04:08:59,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:08:59,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:59,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:08:59,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:08:59,489 INFO L87 Difference]: Start difference. First operand 34818 states and 107348 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 04:08:59,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:59,875 INFO L93 Difference]: Finished difference Result 36428 states and 111724 transitions. [2021-06-05 04:08:59,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:08:59,876 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 04:08:59,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:59,942 INFO L225 Difference]: With dead ends: 36428 [2021-06-05 04:08:59,942 INFO L226 Difference]: Without dead ends: 36428 [2021-06-05 04:08:59,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 445.6ms TimeCoverageRelationStatistics Valid=524, Invalid=1036, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:08:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36428 states. [2021-06-05 04:09:00,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36428 to 34194. [2021-06-05 04:09:00,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34194 states, 34193 states have (on average 3.0853683502471267) internal successors, (105498), 34193 states have internal predecessors, (105498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34194 states to 34194 states and 105498 transitions. [2021-06-05 04:09:00,522 INFO L78 Accepts]: Start accepts. Automaton has 34194 states and 105498 transitions. Word has length 22 [2021-06-05 04:09:00,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:00,522 INFO L482 AbstractCegarLoop]: Abstraction has 34194 states and 105498 transitions. [2021-06-05 04:09:00,522 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 04:09:00,522 INFO L276 IsEmpty]: Start isEmpty. Operand 34194 states and 105498 transitions. [2021-06-05 04:09:00,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:00,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:00,532 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:00,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9916,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:00,732 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:00,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:00,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1663098905, now seen corresponding path program 207 times [2021-06-05 04:09:00,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:00,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25823936] [2021-06-05 04:09:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:00,930 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-05 04:09:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:00,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:00,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25823936] [2021-06-05 04:09:00,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25823936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:00,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135019168] [2021-06-05 04:09:00,958 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 04:09:00,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:09:00,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:00,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:00,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:09:01,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135019168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:01,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:01,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:09:01,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101366331] [2021-06-05 04:09:01,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:09:01,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:01,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:09:01,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:09:01,025 INFO L87 Difference]: Start difference. First operand 34194 states and 105498 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 04:09:01,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:01,295 INFO L93 Difference]: Finished difference Result 34348 states and 105669 transitions. [2021-06-05 04:09:01,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:09:01,295 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 22 [2021-06-05 04:09:01,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:01,356 INFO L225 Difference]: With dead ends: 34348 [2021-06-05 04:09:01,356 INFO L226 Difference]: Without dead ends: 34344 [2021-06-05 04:09:01,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 292.1ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:09:01,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34344 states. [2021-06-05 04:09:01,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34344 to 34194. [2021-06-05 04:09:01,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34194 states, 34193 states have (on average 3.0853098587430177) internal successors, (105496), 34193 states have internal predecessors, (105496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34194 states to 34194 states and 105496 transitions. [2021-06-05 04:09:01,948 INFO L78 Accepts]: Start accepts. Automaton has 34194 states and 105496 transitions. Word has length 22 [2021-06-05 04:09:01,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:01,948 INFO L482 AbstractCegarLoop]: Abstraction has 34194 states and 105496 transitions. [2021-06-05 04:09:01,948 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 04:09:01,948 INFO L276 IsEmpty]: Start isEmpty. Operand 34194 states and 105496 transitions. [2021-06-05 04:09:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:01,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:01,957 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:02,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9917 [2021-06-05 04:09:02,158 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:02,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:02,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1971295143, now seen corresponding path program 208 times [2021-06-05 04:09:02,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:02,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426172895] [2021-06-05 04:09:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:02,230 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 04:09:02,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:02,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426172895] [2021-06-05 04:09:02,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426172895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:02,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768576507] [2021-06-05 04:09:02,230 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 04:09:02,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:09:02,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:02,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:02,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:02,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768576507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:02,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:02,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:09:02,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844546614] [2021-06-05 04:09:02,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:09:02,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:02,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:09:02,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:09:02,301 INFO L87 Difference]: Start difference. First operand 34194 states and 105496 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 04:09:02,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:02,725 INFO L93 Difference]: Finished difference Result 37342 states and 114450 transitions. [2021-06-05 04:09:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:09:02,726 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 04:09:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:02,788 INFO L225 Difference]: With dead ends: 37342 [2021-06-05 04:09:02,788 INFO L226 Difference]: Without dead ends: 37342 [2021-06-05 04:09:02,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 300.9ms TimeCoverageRelationStatistics Valid=415, Invalid=775, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:09:02,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37342 states. [2021-06-05 04:09:03,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37342 to 32084. [2021-06-05 04:09:03,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32084 states, 32083 states have (on average 3.0869307733067357) internal successors, (99038), 32083 states have internal predecessors, (99038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32084 states to 32084 states and 99038 transitions. [2021-06-05 04:09:03,362 INFO L78 Accepts]: Start accepts. Automaton has 32084 states and 99038 transitions. Word has length 22 [2021-06-05 04:09:03,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:03,362 INFO L482 AbstractCegarLoop]: Abstraction has 32084 states and 99038 transitions. [2021-06-05 04:09:03,362 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 04:09:03,362 INFO L276 IsEmpty]: Start isEmpty. Operand 32084 states and 99038 transitions. [2021-06-05 04:09:03,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:03,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:03,371 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:03,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9918 [2021-06-05 04:09:03,572 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:03,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:03,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1334828289, now seen corresponding path program 209 times [2021-06-05 04:09:03,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:03,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010482530] [2021-06-05 04:09:03,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:03,642 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 04:09:03,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:03,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010482530] [2021-06-05 04:09:03,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010482530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:03,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568140128] [2021-06-05 04:09:03,642 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 04:09:03,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:09:03,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:03,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:03,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:03,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568140128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:03,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:03,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:09:03,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515749097] [2021-06-05 04:09:03,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:09:03,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:03,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:09:03,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:09:03,712 INFO L87 Difference]: Start difference. First operand 32084 states and 99038 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 04:09:04,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:04,079 INFO L93 Difference]: Finished difference Result 32697 states and 100396 transitions. [2021-06-05 04:09:04,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:09:04,080 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 04:09:04,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:04,123 INFO L225 Difference]: With dead ends: 32697 [2021-06-05 04:09:04,123 INFO L226 Difference]: Without dead ends: 32697 [2021-06-05 04:09:04,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 174.0ms TimeCoverageRelationStatistics Valid=343, Invalid=649, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:09:04,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32697 states. [2021-06-05 04:09:04,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32697 to 31320. [2021-06-05 04:09:04,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31320 states, 31319 states have (on average 3.0872313930840702) internal successors, (96689), 31319 states have internal predecessors, (96689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:04,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31320 states to 31320 states and 96689 transitions. [2021-06-05 04:09:04,633 INFO L78 Accepts]: Start accepts. Automaton has 31320 states and 96689 transitions. Word has length 22 [2021-06-05 04:09:04,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:04,633 INFO L482 AbstractCegarLoop]: Abstraction has 31320 states and 96689 transitions. [2021-06-05 04:09:04,634 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 04:09:04,634 INFO L276 IsEmpty]: Start isEmpty. Operand 31320 states and 96689 transitions. [2021-06-05 04:09:04,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:04,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:04,643 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:04,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9919,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:04,843 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:04,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:04,844 INFO L82 PathProgramCache]: Analyzing trace with hash 67371111, now seen corresponding path program 210 times [2021-06-05 04:09:04,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:04,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969011866] [2021-06-05 04:09:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:04,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:04,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969011866] [2021-06-05 04:09:04,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969011866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:04,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865759478] [2021-06-05 04:09:04,921 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 04:09:04,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:09:04,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:04,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:04,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:04,993 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 04:09:04,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865759478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:04,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:04,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:09:04,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211201477] [2021-06-05 04:09:04,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:09:04,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:04,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:09:04,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:09:04,994 INFO L87 Difference]: Start difference. First operand 31320 states and 96689 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 04:09:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:05,368 INFO L93 Difference]: Finished difference Result 33049 states and 101433 transitions. [2021-06-05 04:09:05,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:09:05,368 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 04:09:05,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:05,424 INFO L225 Difference]: With dead ends: 33049 [2021-06-05 04:09:05,424 INFO L226 Difference]: Without dead ends: 33049 [2021-06-05 04:09:05,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 264.9ms TimeCoverageRelationStatistics Valid=561, Invalid=1079, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:09:05,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33049 states. [2021-06-05 04:09:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33049 to 30873. [2021-06-05 04:09:05,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30873 states, 30872 states have (on average 3.089045089401399) internal successors, (95365), 30872 states have internal predecessors, (95365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:06,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30873 states to 30873 states and 95365 transitions. [2021-06-05 04:09:06,014 INFO L78 Accepts]: Start accepts. Automaton has 30873 states and 95365 transitions. Word has length 22 [2021-06-05 04:09:06,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:06,014 INFO L482 AbstractCegarLoop]: Abstraction has 30873 states and 95365 transitions. [2021-06-05 04:09:06,014 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 04:09:06,014 INFO L276 IsEmpty]: Start isEmpty. Operand 30873 states and 95365 transitions. [2021-06-05 04:09:06,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:06,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:06,022 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:06,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9920 [2021-06-05 04:09:06,223 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:06,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:06,223 INFO L82 PathProgramCache]: Analyzing trace with hash -658261175, now seen corresponding path program 211 times [2021-06-05 04:09:06,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:06,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414312057] [2021-06-05 04:09:06,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:06,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:06,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414312057] [2021-06-05 04:09:06,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414312057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:06,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030851565] [2021-06-05 04:09:06,281 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 04:09:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:06,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:06,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:06,341 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 04:09:06,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030851565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:06,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:06,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:09:06,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928315047] [2021-06-05 04:09:06,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:09:06,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:06,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:09:06,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:09:06,341 INFO L87 Difference]: Start difference. First operand 30873 states and 95365 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 04:09:06,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:06,575 INFO L93 Difference]: Finished difference Result 31092 states and 95691 transitions. [2021-06-05 04:09:06,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:09:06,575 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 04:09:06,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:06,623 INFO L225 Difference]: With dead ends: 31092 [2021-06-05 04:09:06,623 INFO L226 Difference]: Without dead ends: 31088 [2021-06-05 04:09:06,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:09:06,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31088 states. [2021-06-05 04:09:07,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31088 to 30908. [2021-06-05 04:09:07,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30908 states, 30907 states have (on average 3.088588345682208) internal successors, (95459), 30907 states have internal predecessors, (95459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30908 states to 30908 states and 95459 transitions. [2021-06-05 04:09:07,207 INFO L78 Accepts]: Start accepts. Automaton has 30908 states and 95459 transitions. Word has length 22 [2021-06-05 04:09:07,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:07,207 INFO L482 AbstractCegarLoop]: Abstraction has 30908 states and 95459 transitions. [2021-06-05 04:09:07,207 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 04:09:07,207 INFO L276 IsEmpty]: Start isEmpty. Operand 30908 states and 95459 transitions. [2021-06-05 04:09:07,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:07,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:07,216 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:07,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9921,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:07,416 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:07,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:07,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1059487885, now seen corresponding path program 212 times [2021-06-05 04:09:07,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:07,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345675667] [2021-06-05 04:09:07,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:07,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:07,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:07,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345675667] [2021-06-05 04:09:07,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345675667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:07,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500911310] [2021-06-05 04:09:07,472 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 04:09:07,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:09:07,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:07,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:07,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:07,535 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 04:09:07,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500911310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:07,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:07,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:09:07,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331056622] [2021-06-05 04:09:07,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:09:07,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:07,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:09:07,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:09:07,536 INFO L87 Difference]: Start difference. First operand 30908 states and 95459 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 04:09:07,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:07,707 INFO L93 Difference]: Finished difference Result 31582 states and 97082 transitions. [2021-06-05 04:09:07,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:09:07,707 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 04:09:07,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:07,758 INFO L225 Difference]: With dead ends: 31582 [2021-06-05 04:09:07,758 INFO L226 Difference]: Without dead ends: 31582 [2021-06-05 04:09:07,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:09:07,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31582 states. [2021-06-05 04:09:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31582 to 30923. [2021-06-05 04:09:08,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30923 states, 30922 states have (on average 3.0885130327921866) internal successors, (95503), 30922 states have internal predecessors, (95503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:08,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30923 states to 30923 states and 95503 transitions. [2021-06-05 04:09:08,375 INFO L78 Accepts]: Start accepts. Automaton has 30923 states and 95503 transitions. Word has length 22 [2021-06-05 04:09:08,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:08,375 INFO L482 AbstractCegarLoop]: Abstraction has 30923 states and 95503 transitions. [2021-06-05 04:09:08,375 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 04:09:08,375 INFO L276 IsEmpty]: Start isEmpty. Operand 30923 states and 95503 transitions. [2021-06-05 04:09:08,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:08,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:08,383 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:08,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9922,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:08,584 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:08,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:08,584 INFO L82 PathProgramCache]: Analyzing trace with hash -669559449, now seen corresponding path program 213 times [2021-06-05 04:09:08,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:08,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747042281] [2021-06-05 04:09:08,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:08,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:08,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747042281] [2021-06-05 04:09:08,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747042281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:08,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369542457] [2021-06-05 04:09:08,639 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 04:09:08,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:09:08,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:08,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:08,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:08,709 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 04:09:08,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369542457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:08,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:08,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:09:08,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369624426] [2021-06-05 04:09:08,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:09:08,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:08,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:09:08,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:09:08,710 INFO L87 Difference]: Start difference. First operand 30923 states and 95503 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 04:09:08,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:08,907 INFO L93 Difference]: Finished difference Result 31896 states and 97991 transitions. [2021-06-05 04:09:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:09:08,907 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 04:09:08,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:08,951 INFO L225 Difference]: With dead ends: 31896 [2021-06-05 04:09:08,951 INFO L226 Difference]: Without dead ends: 31896 [2021-06-05 04:09:08,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=193, Invalid=313, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:09:08,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31896 states. [2021-06-05 04:09:09,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31896 to 30949. [2021-06-05 04:09:09,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30949 states, 30948 states have (on average 3.0883094222566885) internal successors, (95577), 30948 states have internal predecessors, (95577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:09,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30949 states to 30949 states and 95577 transitions. [2021-06-05 04:09:09,780 INFO L78 Accepts]: Start accepts. Automaton has 30949 states and 95577 transitions. Word has length 22 [2021-06-05 04:09:09,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:09,780 INFO L482 AbstractCegarLoop]: Abstraction has 30949 states and 95577 transitions. [2021-06-05 04:09:09,780 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 04:09:09,780 INFO L276 IsEmpty]: Start isEmpty. Operand 30949 states and 95577 transitions. [2021-06-05 04:09:09,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:09,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:09,789 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:10,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9923,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:10,013 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:10,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:10,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1564548045, now seen corresponding path program 214 times [2021-06-05 04:09:10,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:10,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629261682] [2021-06-05 04:09:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:10,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:10,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629261682] [2021-06-05 04:09:10,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629261682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:10,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265648342] [2021-06-05 04:09:10,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:09:10,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:09:10,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:10,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:10,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:10,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265648342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:10,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:10,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:09:10,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415231973] [2021-06-05 04:09:10,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:09:10,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:10,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:09:10,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:09:10,151 INFO L87 Difference]: Start difference. First operand 30949 states and 95577 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 04:09:10,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:10,357 INFO L93 Difference]: Finished difference Result 31958 states and 98178 transitions. [2021-06-05 04:09:10,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:09:10,358 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 04:09:10,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:10,410 INFO L225 Difference]: With dead ends: 31958 [2021-06-05 04:09:10,410 INFO L226 Difference]: Without dead ends: 31958 [2021-06-05 04:09:10,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:09:10,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31958 states. [2021-06-05 04:09:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31958 to 30995. [2021-06-05 04:09:10,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30995 states, 30994 states have (on average 3.0880170355552687) internal successors, (95710), 30994 states have internal predecessors, (95710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:10,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30995 states to 30995 states and 95710 transitions. [2021-06-05 04:09:10,933 INFO L78 Accepts]: Start accepts. Automaton has 30995 states and 95710 transitions. Word has length 22 [2021-06-05 04:09:10,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:10,933 INFO L482 AbstractCegarLoop]: Abstraction has 30995 states and 95710 transitions. [2021-06-05 04:09:10,933 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 04:09:10,933 INFO L276 IsEmpty]: Start isEmpty. Operand 30995 states and 95710 transitions. [2021-06-05 04:09:10,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:10,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:10,943 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:11,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9924,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:11,143 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:11,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:11,144 INFO L82 PathProgramCache]: Analyzing trace with hash 2102403623, now seen corresponding path program 215 times [2021-06-05 04:09:11,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:11,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671469707] [2021-06-05 04:09:11,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:11,209 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 04:09:11,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:11,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671469707] [2021-06-05 04:09:11,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671469707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:11,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956990210] [2021-06-05 04:09:11,210 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 04:09:11,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:09:11,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:11,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:11,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:11,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956990210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:11,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:11,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:09:11,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461788703] [2021-06-05 04:09:11,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:09:11,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:11,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:09:11,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:09:11,282 INFO L87 Difference]: Start difference. First operand 30995 states and 95710 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 04:09:11,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:11,727 INFO L93 Difference]: Finished difference Result 36047 states and 110795 transitions. [2021-06-05 04:09:11,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:09:11,727 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 04:09:11,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:11,782 INFO L225 Difference]: With dead ends: 36047 [2021-06-05 04:09:11,782 INFO L226 Difference]: Without dead ends: 36047 [2021-06-05 04:09:11,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:09:11,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36047 states. [2021-06-05 04:09:12,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36047 to 35338. [2021-06-05 04:09:12,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35338 states, 35337 states have (on average 3.0890001980926507) internal successors, (109156), 35337 states have internal predecessors, (109156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:12,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35338 states to 35338 states and 109156 transitions. [2021-06-05 04:09:12,352 INFO L78 Accepts]: Start accepts. Automaton has 35338 states and 109156 transitions. Word has length 22 [2021-06-05 04:09:12,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:12,352 INFO L482 AbstractCegarLoop]: Abstraction has 35338 states and 109156 transitions. [2021-06-05 04:09:12,352 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 04:09:12,352 INFO L276 IsEmpty]: Start isEmpty. Operand 35338 states and 109156 transitions. [2021-06-05 04:09:12,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:12,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:12,362 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:12,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9925 [2021-06-05 04:09:12,562 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:12,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:12,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1596057357, now seen corresponding path program 216 times [2021-06-05 04:09:12,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:12,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541621952] [2021-06-05 04:09:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:12,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:12,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541621952] [2021-06-05 04:09:12,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541621952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:12,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182655312] [2021-06-05 04:09:12,628 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 04:09:12,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:09:12,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:12,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:12,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:12,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182655312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:12,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:12,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:09:12,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516142268] [2021-06-05 04:09:12,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:09:12,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:12,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:09:12,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:09:12,700 INFO L87 Difference]: Start difference. First operand 35338 states and 109156 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 04:09:12,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:12,887 INFO L93 Difference]: Finished difference Result 39264 states and 120741 transitions. [2021-06-05 04:09:12,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:09:12,887 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 04:09:12,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:12,950 INFO L225 Difference]: With dead ends: 39264 [2021-06-05 04:09:12,950 INFO L226 Difference]: Without dead ends: 39264 [2021-06-05 04:09:12,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:09:13,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39264 states. [2021-06-05 04:09:13,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39264 to 38914. [2021-06-05 04:09:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38914 states, 38913 states have (on average 3.083982216739907) internal successors, (120007), 38913 states have internal predecessors, (120007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:13,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38914 states to 38914 states and 120007 transitions. [2021-06-05 04:09:13,680 INFO L78 Accepts]: Start accepts. Automaton has 38914 states and 120007 transitions. Word has length 22 [2021-06-05 04:09:13,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:13,680 INFO L482 AbstractCegarLoop]: Abstraction has 38914 states and 120007 transitions. [2021-06-05 04:09:13,680 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 04:09:13,680 INFO L276 IsEmpty]: Start isEmpty. Operand 38914 states and 120007 transitions. [2021-06-05 04:09:13,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:13,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:13,691 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:13,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9926,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:13,891 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:13,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:13,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1215775001, now seen corresponding path program 217 times [2021-06-05 04:09:13,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:13,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418816749] [2021-06-05 04:09:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:13,965 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 04:09:13,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:13,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418816749] [2021-06-05 04:09:13,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418816749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:13,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575252252] [2021-06-05 04:09:13,966 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 04:09:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:13,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:13,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:14,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575252252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:14,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:14,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:09:14,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922052234] [2021-06-05 04:09:14,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:09:14,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:14,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:09:14,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:09:14,037 INFO L87 Difference]: Start difference. First operand 38914 states and 120007 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 04:09:14,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:14,285 INFO L93 Difference]: Finished difference Result 39365 states and 121002 transitions. [2021-06-05 04:09:14,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:09:14,286 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 04:09:14,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:14,522 INFO L225 Difference]: With dead ends: 39365 [2021-06-05 04:09:14,522 INFO L226 Difference]: Without dead ends: 39365 [2021-06-05 04:09:14,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:09:14,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39365 states. [2021-06-05 04:09:14,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39365 to 38918. [2021-06-05 04:09:14,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38918 states, 38917 states have (on average 3.0839735848086955) internal successors, (120019), 38917 states have internal predecessors, (120019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38918 states to 38918 states and 120019 transitions. [2021-06-05 04:09:15,054 INFO L78 Accepts]: Start accepts. Automaton has 38918 states and 120019 transitions. Word has length 22 [2021-06-05 04:09:15,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:15,055 INFO L482 AbstractCegarLoop]: Abstraction has 38918 states and 120019 transitions. [2021-06-05 04:09:15,055 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 04:09:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 38918 states and 120019 transitions. [2021-06-05 04:09:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:15,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:15,065 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:15,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9927 [2021-06-05 04:09:15,265 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:15,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:15,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1811735117, now seen corresponding path program 218 times [2021-06-05 04:09:15,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:15,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018789581] [2021-06-05 04:09:15,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:15,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:15,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018789581] [2021-06-05 04:09:15,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018789581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:15,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462715041] [2021-06-05 04:09:15,344 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 04:09:15,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:09:15,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:15,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:15,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:15,416 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 04:09:15,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462715041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:15,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:15,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:09:15,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310040370] [2021-06-05 04:09:15,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:09:15,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:15,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:09:15,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:09:15,417 INFO L87 Difference]: Start difference. First operand 38918 states and 120019 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 04:09:15,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:15,941 INFO L93 Difference]: Finished difference Result 40630 states and 124791 transitions. [2021-06-05 04:09:15,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:09:15,941 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 04:09:15,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:16,003 INFO L225 Difference]: With dead ends: 40630 [2021-06-05 04:09:16,003 INFO L226 Difference]: Without dead ends: 40630 [2021-06-05 04:09:16,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 218.8ms TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:09:16,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40630 states. [2021-06-05 04:09:16,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40630 to 40219. [2021-06-05 04:09:16,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40219 states, 40218 states have (on average 3.082301457059028) internal successors, (123964), 40218 states have internal predecessors, (123964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:16,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40219 states to 40219 states and 123964 transitions. [2021-06-05 04:09:16,674 INFO L78 Accepts]: Start accepts. Automaton has 40219 states and 123964 transitions. Word has length 22 [2021-06-05 04:09:16,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:16,674 INFO L482 AbstractCegarLoop]: Abstraction has 40219 states and 123964 transitions. [2021-06-05 04:09:16,674 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 04:09:16,674 INFO L276 IsEmpty]: Start isEmpty. Operand 40219 states and 123964 transitions. [2021-06-05 04:09:16,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:16,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:16,685 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:16,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9928,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:16,885 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:16,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:16,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1175268263, now seen corresponding path program 219 times [2021-06-05 04:09:16,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:16,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14814772] [2021-06-05 04:09:16,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:16,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:16,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14814772] [2021-06-05 04:09:16,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14814772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:16,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719509570] [2021-06-05 04:09:16,966 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 04:09:16,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:09:16,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:16,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:16,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:17,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719509570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:17,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:17,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:09:17,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920165156] [2021-06-05 04:09:17,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:09:17,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:17,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:09:17,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:09:17,039 INFO L87 Difference]: Start difference. First operand 40219 states and 123964 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 04:09:17,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:17,628 INFO L93 Difference]: Finished difference Result 42248 states and 129555 transitions. [2021-06-05 04:09:17,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 04:09:17,629 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 04:09:17,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:17,712 INFO L225 Difference]: With dead ends: 42248 [2021-06-05 04:09:17,712 INFO L226 Difference]: Without dead ends: 42248 [2021-06-05 04:09:17,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 427.9ms TimeCoverageRelationStatistics Valid=665, Invalid=1315, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:09:17,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42248 states. [2021-06-05 04:09:18,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42248 to 41433. [2021-06-05 04:09:18,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41433 states, 41432 states have (on average 3.080614018150222) internal successors, (127636), 41432 states have internal predecessors, (127636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41433 states to 41433 states and 127636 transitions. [2021-06-05 04:09:18,380 INFO L78 Accepts]: Start accepts. Automaton has 41433 states and 127636 transitions. Word has length 22 [2021-06-05 04:09:18,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:18,380 INFO L482 AbstractCegarLoop]: Abstraction has 41433 states and 127636 transitions. [2021-06-05 04:09:18,380 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 04:09:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 41433 states and 127636 transitions. [2021-06-05 04:09:18,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:18,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:18,391 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:18,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9929,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:18,592 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:18,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:18,593 INFO L82 PathProgramCache]: Analyzing trace with hash -141305647, now seen corresponding path program 220 times [2021-06-05 04:09:18,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:18,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178022884] [2021-06-05 04:09:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:18,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:18,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178022884] [2021-06-05 04:09:18,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178022884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:18,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166259961] [2021-06-05 04:09:18,851 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 04:09:18,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:09:18,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:18,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:18,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:18,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166259961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:18,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:18,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:09:18,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550565418] [2021-06-05 04:09:18,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:09:18,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:18,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:09:18,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:09:18,910 INFO L87 Difference]: Start difference. First operand 41433 states and 127636 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 04:09:19,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:19,238 INFO L93 Difference]: Finished difference Result 41740 states and 128184 transitions. [2021-06-05 04:09:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:09:19,238 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 04:09:19,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:19,305 INFO L225 Difference]: With dead ends: 41740 [2021-06-05 04:09:19,305 INFO L226 Difference]: Without dead ends: 41734 [2021-06-05 04:09:19,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 361.0ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:09:19,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41734 states. [2021-06-05 04:09:19,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41734 to 40967. [2021-06-05 04:09:19,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40967 states, 40966 states have (on average 3.0791632085143776) internal successors, (126141), 40966 states have internal predecessors, (126141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40967 states to 40967 states and 126141 transitions. [2021-06-05 04:09:20,250 INFO L78 Accepts]: Start accepts. Automaton has 40967 states and 126141 transitions. Word has length 22 [2021-06-05 04:09:20,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:20,250 INFO L482 AbstractCegarLoop]: Abstraction has 40967 states and 126141 transitions. [2021-06-05 04:09:20,250 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 04:09:20,250 INFO L276 IsEmpty]: Start isEmpty. Operand 40967 states and 126141 transitions. [2021-06-05 04:09:20,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:20,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:20,261 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:20,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9930 [2021-06-05 04:09:20,462 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:20,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:20,462 INFO L82 PathProgramCache]: Analyzing trace with hash 429354799, now seen corresponding path program 221 times [2021-06-05 04:09:20,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:20,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384579175] [2021-06-05 04:09:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:20,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:20,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384579175] [2021-06-05 04:09:20,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384579175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:20,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726090422] [2021-06-05 04:09:20,525 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 04:09:20,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:09:20,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:20,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:20,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:20,589 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 04:09:20,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726090422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:20,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:20,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:09:20,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052281613] [2021-06-05 04:09:20,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:09:20,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:20,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:09:20,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:09:20,590 INFO L87 Difference]: Start difference. First operand 40967 states and 126141 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 04:09:20,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:20,790 INFO L93 Difference]: Finished difference Result 46670 states and 143099 transitions. [2021-06-05 04:09:20,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:09:20,791 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 04:09:20,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:20,866 INFO L225 Difference]: With dead ends: 46670 [2021-06-05 04:09:20,867 INFO L226 Difference]: Without dead ends: 46670 [2021-06-05 04:09:20,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:09:20,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46670 states. [2021-06-05 04:09:21,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46670 to 45904. [2021-06-05 04:09:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45904 states, 45903 states have (on average 3.0725224930832407) internal successors, (141038), 45903 states have internal predecessors, (141038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45904 states to 45904 states and 141038 transitions. [2021-06-05 04:09:21,861 INFO L78 Accepts]: Start accepts. Automaton has 45904 states and 141038 transitions. Word has length 22 [2021-06-05 04:09:21,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:21,861 INFO L482 AbstractCegarLoop]: Abstraction has 45904 states and 141038 transitions. [2021-06-05 04:09:21,861 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 04:09:21,861 INFO L276 IsEmpty]: Start isEmpty. Operand 45904 states and 141038 transitions. [2021-06-05 04:09:21,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:21,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:21,874 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:22,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9931,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:22,075 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:22,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:22,075 INFO L82 PathProgramCache]: Analyzing trace with hash -76991467, now seen corresponding path program 222 times [2021-06-05 04:09:22,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:22,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382575682] [2021-06-05 04:09:22,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:22,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:22,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382575682] [2021-06-05 04:09:22,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382575682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:22,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459477476] [2021-06-05 04:09:22,150 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 04:09:22,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:09:22,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:22,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:22,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:22,221 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 04:09:22,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459477476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:22,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:22,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:09:22,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266377992] [2021-06-05 04:09:22,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:09:22,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:22,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:09:22,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:09:22,222 INFO L87 Difference]: Start difference. First operand 45904 states and 141038 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 04:09:22,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:22,513 INFO L93 Difference]: Finished difference Result 49343 states and 151040 transitions. [2021-06-05 04:09:22,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:09:22,513 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 04:09:22,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:22,620 INFO L225 Difference]: With dead ends: 49343 [2021-06-05 04:09:22,620 INFO L226 Difference]: Without dead ends: 49343 [2021-06-05 04:09:22,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:09:22,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49343 states. [2021-06-05 04:09:23,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49343 to 46131. [2021-06-05 04:09:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46131 states, 46130 states have (on average 3.0718621287665293) internal successors, (141705), 46130 states have internal predecessors, (141705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46131 states to 46131 states and 141705 transitions. [2021-06-05 04:09:23,583 INFO L78 Accepts]: Start accepts. Automaton has 46131 states and 141705 transitions. Word has length 22 [2021-06-05 04:09:23,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:23,583 INFO L482 AbstractCegarLoop]: Abstraction has 46131 states and 141705 transitions. [2021-06-05 04:09:23,583 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 04:09:23,583 INFO L276 IsEmpty]: Start isEmpty. Operand 46131 states and 141705 transitions. [2021-06-05 04:09:23,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:23,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:23,596 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:23,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9932 [2021-06-05 04:09:23,797 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:23,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:23,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1406143471, now seen corresponding path program 223 times [2021-06-05 04:09:23,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:23,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659407331] [2021-06-05 04:09:23,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:23,869 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 04:09:23,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:23,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659407331] [2021-06-05 04:09:23,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659407331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:23,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994542385] [2021-06-05 04:09:23,870 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 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 04:09:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:23,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:23,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:23,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994542385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:23,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:23,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:09:23,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28572496] [2021-06-05 04:09:23,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:09:23,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:23,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:09:23,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:09:23,933 INFO L87 Difference]: Start difference. First operand 46131 states and 141705 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 04:09:24,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:24,272 INFO L93 Difference]: Finished difference Result 55150 states and 168573 transitions. [2021-06-05 04:09:24,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:09:24,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:09:24,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:24,369 INFO L225 Difference]: With dead ends: 55150 [2021-06-05 04:09:24,369 INFO L226 Difference]: Without dead ends: 55150 [2021-06-05 04:09:24,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:09:24,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55150 states. [2021-06-05 04:09:25,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55150 to 52518. [2021-06-05 04:09:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52518 states, 52517 states have (on average 3.067406744482739) internal successors, (161091), 52517 states have internal predecessors, (161091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:25,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52518 states to 52518 states and 161091 transitions. [2021-06-05 04:09:25,510 INFO L78 Accepts]: Start accepts. Automaton has 52518 states and 161091 transitions. Word has length 22 [2021-06-05 04:09:25,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:25,510 INFO L482 AbstractCegarLoop]: Abstraction has 52518 states and 161091 transitions. [2021-06-05 04:09:25,510 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 04:09:25,510 INFO L276 IsEmpty]: Start isEmpty. Operand 52518 states and 161091 transitions. [2021-06-05 04:09:25,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:25,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:25,525 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:25,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9933,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:25,725 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:25,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:25,726 INFO L82 PathProgramCache]: Analyzing trace with hash 138686293, now seen corresponding path program 224 times [2021-06-05 04:09:25,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:25,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595515988] [2021-06-05 04:09:25,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:25,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:25,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595515988] [2021-06-05 04:09:25,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595515988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:25,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121859020] [2021-06-05 04:09:25,802 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 04:09:25,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:09:25,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:25,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:25,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:25,868 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 04:09:25,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121859020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:25,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:25,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:09:25,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860950957] [2021-06-05 04:09:25,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:09:25,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:25,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:09:25,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:09:25,868 INFO L87 Difference]: Start difference. First operand 52518 states and 161091 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 04:09:26,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:26,357 INFO L93 Difference]: Finished difference Result 68037 states and 207399 transitions. [2021-06-05 04:09:26,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:09:26,357 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 04:09:26,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:26,778 INFO L225 Difference]: With dead ends: 68037 [2021-06-05 04:09:26,778 INFO L226 Difference]: Without dead ends: 68037 [2021-06-05 04:09:26,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=523, Invalid=1037, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:09:26,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68037 states. [2021-06-05 04:09:27,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68037 to 63418. [2021-06-05 04:09:27,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63418 states, 63417 states have (on average 3.060788116751029) internal successors, (194106), 63417 states have internal predecessors, (194106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63418 states to 63418 states and 194106 transitions. [2021-06-05 04:09:28,098 INFO L78 Accepts]: Start accepts. Automaton has 63418 states and 194106 transitions. Word has length 22 [2021-06-05 04:09:28,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:28,098 INFO L482 AbstractCegarLoop]: Abstraction has 63418 states and 194106 transitions. [2021-06-05 04:09:28,098 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 04:09:28,098 INFO L276 IsEmpty]: Start isEmpty. Operand 63418 states and 194106 transitions. [2021-06-05 04:09:28,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:28,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:28,115 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:28,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9934,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:28,316 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:28,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:28,316 INFO L82 PathProgramCache]: Analyzing trace with hash -353147191, now seen corresponding path program 225 times [2021-06-05 04:09:28,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:28,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480298526] [2021-06-05 04:09:28,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:28,392 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 04:09:28,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:28,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480298526] [2021-06-05 04:09:28,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480298526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:28,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827897887] [2021-06-05 04:09:28,392 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 04:09:28,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:09:28,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:28,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:28,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:28,482 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 04:09:28,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827897887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:28,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:28,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:09:28,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881392087] [2021-06-05 04:09:28,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:09:28,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:28,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:09:28,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:09:28,483 INFO L87 Difference]: Start difference. First operand 63418 states and 194106 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 04:09:28,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:28,897 INFO L93 Difference]: Finished difference Result 75602 states and 230264 transitions. [2021-06-05 04:09:28,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:09:28,897 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 04:09:28,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:29,031 INFO L225 Difference]: With dead ends: 75602 [2021-06-05 04:09:29,032 INFO L226 Difference]: Without dead ends: 75602 [2021-06-05 04:09:29,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 184.4ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:09:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75602 states. [2021-06-05 04:09:30,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75602 to 53421. [2021-06-05 04:09:30,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53421 states, 53420 states have (on average 3.0645638337701238) internal successors, (163709), 53420 states have internal predecessors, (163709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:30,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53421 states to 53421 states and 163709 transitions. [2021-06-05 04:09:30,423 INFO L78 Accepts]: Start accepts. Automaton has 53421 states and 163709 transitions. Word has length 22 [2021-06-05 04:09:30,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:30,423 INFO L482 AbstractCegarLoop]: Abstraction has 53421 states and 163709 transitions. [2021-06-05 04:09:30,423 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 04:09:30,423 INFO L276 IsEmpty]: Start isEmpty. Operand 53421 states and 163709 transitions. [2021-06-05 04:09:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:30,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:30,438 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:30,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9935,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:30,639 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:30,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1620604369, now seen corresponding path program 226 times [2021-06-05 04:09:30,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:30,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31630408] [2021-06-05 04:09:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:30,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:30,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31630408] [2021-06-05 04:09:30,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31630408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:30,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667794515] [2021-06-05 04:09:30,711 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 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 04:09:30,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:09:30,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:30,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:30,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:30,791 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 04:09:30,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667794515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:30,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:30,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:09:30,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752516444] [2021-06-05 04:09:30,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:09:30,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:30,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:09:30,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:09:30,792 INFO L87 Difference]: Start difference. First operand 53421 states and 163709 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 04:09:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:31,545 INFO L93 Difference]: Finished difference Result 68985 states and 210204 transitions. [2021-06-05 04:09:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:09:31,546 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 04:09:31,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:31,669 INFO L225 Difference]: With dead ends: 68985 [2021-06-05 04:09:31,669 INFO L226 Difference]: Without dead ends: 68985 [2021-06-05 04:09:31,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 265.1ms TimeCoverageRelationStatistics Valid=560, Invalid=1080, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:09:31,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68985 states. [2021-06-05 04:09:32,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68985 to 46695. [2021-06-05 04:09:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46695 states, 46694 states have (on average 3.0735426393112606) internal successors, (143516), 46694 states have internal predecessors, (143516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:32,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46695 states to 46695 states and 143516 transitions. [2021-06-05 04:09:32,848 INFO L78 Accepts]: Start accepts. Automaton has 46695 states and 143516 transitions. Word has length 22 [2021-06-05 04:09:32,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:32,849 INFO L482 AbstractCegarLoop]: Abstraction has 46695 states and 143516 transitions. [2021-06-05 04:09:32,849 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 04:09:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 46695 states and 143516 transitions. [2021-06-05 04:09:32,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:32,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:32,862 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:33,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9936,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:33,062 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:33,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:33,062 INFO L82 PathProgramCache]: Analyzing trace with hash 414428143, now seen corresponding path program 227 times [2021-06-05 04:09:33,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:33,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106459725] [2021-06-05 04:09:33,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:33,122 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 04:09:33,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:33,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106459725] [2021-06-05 04:09:33,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106459725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:33,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264397598] [2021-06-05 04:09:33,122 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 04:09:33,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:09:33,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:33,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:33,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:33,190 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 04:09:33,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264397598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:33,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:33,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:09:33,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47193287] [2021-06-05 04:09:33,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:09:33,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:33,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:09:33,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:09:33,191 INFO L87 Difference]: Start difference. First operand 46695 states and 143516 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 04:09:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:33,435 INFO L93 Difference]: Finished difference Result 49438 states and 151354 transitions. [2021-06-05 04:09:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:09:33,435 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 04:09:33,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:33,521 INFO L225 Difference]: With dead ends: 49438 [2021-06-05 04:09:33,521 INFO L226 Difference]: Without dead ends: 49438 [2021-06-05 04:09:33,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:09:33,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49438 states. [2021-06-05 04:09:34,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49438 to 36426. [2021-06-05 04:09:34,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36426 states, 36425 states have (on average 3.0824433768016473) internal successors, (112278), 36425 states have internal predecessors, (112278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:34,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36426 states to 36426 states and 112278 transitions. [2021-06-05 04:09:34,522 INFO L78 Accepts]: Start accepts. Automaton has 36426 states and 112278 transitions. Word has length 22 [2021-06-05 04:09:34,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:34,522 INFO L482 AbstractCegarLoop]: Abstraction has 36426 states and 112278 transitions. [2021-06-05 04:09:34,522 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 04:09:34,522 INFO L276 IsEmpty]: Start isEmpty. Operand 36426 states and 112278 transitions. [2021-06-05 04:09:34,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:34,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:34,532 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:34,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9937 [2021-06-05 04:09:34,732 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:34,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:34,733 INFO L82 PathProgramCache]: Analyzing trace with hash -91918123, now seen corresponding path program 228 times [2021-06-05 04:09:34,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:34,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827193910] [2021-06-05 04:09:34,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:34,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:34,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827193910] [2021-06-05 04:09:34,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827193910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:34,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191588616] [2021-06-05 04:09:34,803 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 04:09:34,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:09:34,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:34,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:34,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:34,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191588616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:34,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:34,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:09:34,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942629704] [2021-06-05 04:09:34,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:09:34,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:34,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:09:34,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:09:34,879 INFO L87 Difference]: Start difference. First operand 36426 states and 112278 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 04:09:35,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:35,072 INFO L93 Difference]: Finished difference Result 38526 states and 118284 transitions. [2021-06-05 04:09:35,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:09:35,073 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 04:09:35,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:35,133 INFO L225 Difference]: With dead ends: 38526 [2021-06-05 04:09:35,133 INFO L226 Difference]: Without dead ends: 38526 [2021-06-05 04:09:35,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:09:35,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38526 states. [2021-06-05 04:09:35,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38526 to 38139. [2021-06-05 04:09:35,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38139 states, 38138 states have (on average 3.0788976873459544) internal successors, (117423), 38138 states have internal predecessors, (117423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:36,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38139 states to 38139 states and 117423 transitions. [2021-06-05 04:09:36,119 INFO L78 Accepts]: Start accepts. Automaton has 38139 states and 117423 transitions. Word has length 22 [2021-06-05 04:09:36,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:36,119 INFO L482 AbstractCegarLoop]: Abstraction has 38139 states and 117423 transitions. [2021-06-05 04:09:36,119 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 04:09:36,120 INFO L276 IsEmpty]: Start isEmpty. Operand 38139 states and 117423 transitions. [2021-06-05 04:09:36,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:36,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:36,131 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:36,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9938,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:36,331 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:36,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:36,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1391216815, now seen corresponding path program 229 times [2021-06-05 04:09:36,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:36,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89409771] [2021-06-05 04:09:36,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:36,403 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 04:09:36,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:36,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89409771] [2021-06-05 04:09:36,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89409771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:36,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708160035] [2021-06-05 04:09:36,403 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 04:09:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:36,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:36,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:36,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708160035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:36,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:36,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:09:36,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145036773] [2021-06-05 04:09:36,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:09:36,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:36,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:09:36,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:09:36,473 INFO L87 Difference]: Start difference. First operand 38139 states and 117423 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 04:09:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:36,727 INFO L93 Difference]: Finished difference Result 38877 states and 119237 transitions. [2021-06-05 04:09:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:09:36,727 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 04:09:36,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:36,788 INFO L225 Difference]: With dead ends: 38877 [2021-06-05 04:09:36,788 INFO L226 Difference]: Without dead ends: 38877 [2021-06-05 04:09:36,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:09:36,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38877 states. [2021-06-05 04:09:37,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38877 to 37259. [2021-06-05 04:09:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37259 states, 37258 states have (on average 3.0800096623543936) internal successors, (114755), 37258 states have internal predecessors, (114755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37259 states to 37259 states and 114755 transitions. [2021-06-05 04:09:37,431 INFO L78 Accepts]: Start accepts. Automaton has 37259 states and 114755 transitions. Word has length 22 [2021-06-05 04:09:37,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:37,431 INFO L482 AbstractCegarLoop]: Abstraction has 37259 states and 114755 transitions. [2021-06-05 04:09:37,431 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 04:09:37,431 INFO L276 IsEmpty]: Start isEmpty. Operand 37259 states and 114755 transitions. [2021-06-05 04:09:37,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:37,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:37,718 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:37,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9939 [2021-06-05 04:09:37,919 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:37,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:37,919 INFO L82 PathProgramCache]: Analyzing trace with hash 123759637, now seen corresponding path program 230 times [2021-06-05 04:09:37,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:37,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070344723] [2021-06-05 04:09:37,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:38,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:38,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070344723] [2021-06-05 04:09:38,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070344723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:38,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926576061] [2021-06-05 04:09:38,009 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 04:09:38,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:09:38,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:38,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:38,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:38,091 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 04:09:38,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926576061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:38,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:38,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:09:38,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447541009] [2021-06-05 04:09:38,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:09:38,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:38,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:09:38,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:09:38,092 INFO L87 Difference]: Start difference. First operand 37259 states and 114755 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 04:09:38,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:38,494 INFO L93 Difference]: Finished difference Result 39004 states and 119600 transitions. [2021-06-05 04:09:38,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:09:38,494 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 04:09:38,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:38,572 INFO L225 Difference]: With dead ends: 39004 [2021-06-05 04:09:38,572 INFO L226 Difference]: Without dead ends: 39004 [2021-06-05 04:09:38,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:09:38,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39004 states. [2021-06-05 04:09:39,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39004 to 37661. [2021-06-05 04:09:39,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37661 states, 37660 states have (on average 3.0793414763674987) internal successors, (115968), 37660 states have internal predecessors, (115968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:39,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37661 states to 37661 states and 115968 transitions. [2021-06-05 04:09:39,296 INFO L78 Accepts]: Start accepts. Automaton has 37661 states and 115968 transitions. Word has length 22 [2021-06-05 04:09:39,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:39,296 INFO L482 AbstractCegarLoop]: Abstraction has 37661 states and 115968 transitions. [2021-06-05 04:09:39,296 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 04:09:39,296 INFO L276 IsEmpty]: Start isEmpty. Operand 37661 states and 115968 transitions. [2021-06-05 04:09:39,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:39,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:39,306 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:39,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9940 [2021-06-05 04:09:39,506 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:39,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:39,507 INFO L82 PathProgramCache]: Analyzing trace with hash -512707217, now seen corresponding path program 231 times [2021-06-05 04:09:39,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:39,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193673579] [2021-06-05 04:09:39,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:39,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:39,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193673579] [2021-06-05 04:09:39,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193673579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:39,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132361318] [2021-06-05 04:09:39,787 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 04:09:39,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:09:39,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:39,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:39,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:39,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132361318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:39,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:39,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:09:39,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481402938] [2021-06-05 04:09:39,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:09:39,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:39,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:09:39,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:09:39,882 INFO L87 Difference]: Start difference. First operand 37661 states and 115968 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 04:09:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:40,322 INFO L93 Difference]: Finished difference Result 39220 states and 120135 transitions. [2021-06-05 04:09:40,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 04:09:40,323 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 04:09:40,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:40,387 INFO L225 Difference]: With dead ends: 39220 [2021-06-05 04:09:40,387 INFO L226 Difference]: Without dead ends: 39220 [2021-06-05 04:09:40,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 518.2ms TimeCoverageRelationStatistics Valid=664, Invalid=1316, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:09:40,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39220 states. [2021-06-05 04:09:40,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39220 to 37458. [2021-06-05 04:09:40,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37458 states, 37457 states have (on average 3.08011853592119) internal successors, (115372), 37457 states have internal predecessors, (115372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37458 states to 37458 states and 115372 transitions. [2021-06-05 04:09:40,964 INFO L78 Accepts]: Start accepts. Automaton has 37458 states and 115372 transitions. Word has length 22 [2021-06-05 04:09:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:40,964 INFO L482 AbstractCegarLoop]: Abstraction has 37458 states and 115372 transitions. [2021-06-05 04:09:40,965 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 04:09:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 37458 states and 115372 transitions. [2021-06-05 04:09:40,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:40,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:40,974 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:41,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9941 [2021-06-05 04:09:41,175 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:41,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:41,175 INFO L82 PathProgramCache]: Analyzing trace with hash -2054510059, now seen corresponding path program 232 times [2021-06-05 04:09:41,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:41,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814391437] [2021-06-05 04:09:41,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:41,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:41,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814391437] [2021-06-05 04:09:41,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814391437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:41,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114460336] [2021-06-05 04:09:41,228 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 04:09:41,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:09:41,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:41,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:41,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:41,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114460336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:41,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:41,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:09:41,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110115682] [2021-06-05 04:09:41,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:09:41,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:41,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:09:41,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:09:41,472 INFO L87 Difference]: Start difference. First operand 37458 states and 115372 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 04:09:41,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:41,762 INFO L93 Difference]: Finished difference Result 37627 states and 115565 transitions. [2021-06-05 04:09:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:09:41,762 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 04:09:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:41,822 INFO L225 Difference]: With dead ends: 37627 [2021-06-05 04:09:41,823 INFO L226 Difference]: Without dead ends: 37623 [2021-06-05 04:09:41,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:09:41,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37623 states. [2021-06-05 04:09:42,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37623 to 37458. [2021-06-05 04:09:42,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37458 states, 37457 states have (on average 3.0800117468030006) internal successors, (115368), 37457 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 04:09:42,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37458 states to 37458 states and 115368 transitions. [2021-06-05 04:09:42,443 INFO L78 Accepts]: Start accepts. Automaton has 37458 states and 115368 transitions. Word has length 22 [2021-06-05 04:09:42,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:42,444 INFO L482 AbstractCegarLoop]: Abstraction has 37458 states and 115368 transitions. [2021-06-05 04:09:42,444 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 04:09:42,444 INFO L276 IsEmpty]: Start isEmpty. Operand 37458 states and 115368 transitions. [2021-06-05 04:09:42,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:42,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:42,454 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:42,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9942 [2021-06-05 04:09:42,654 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:42,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:42,654 INFO L82 PathProgramCache]: Analyzing trace with hash -324040043, now seen corresponding path program 233 times [2021-06-05 04:09:42,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:42,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858102978] [2021-06-05 04:09:42,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:42,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:42,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858102978] [2021-06-05 04:09:42,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858102978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:42,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885637980] [2021-06-05 04:09:42,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:09:42,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:09:42,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:42,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:42,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:42,801 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 04:09:42,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885637980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:42,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:42,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:09:42,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644457969] [2021-06-05 04:09:42,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:09:42,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:42,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:09:42,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:09:42,802 INFO L87 Difference]: Start difference. First operand 37458 states and 115368 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 04:09:43,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:43,274 INFO L93 Difference]: Finished difference Result 44126 states and 134929 transitions. [2021-06-05 04:09:43,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:09:43,275 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 04:09:43,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:43,348 INFO L225 Difference]: With dead ends: 44126 [2021-06-05 04:09:43,349 INFO L226 Difference]: Without dead ends: 44126 [2021-06-05 04:09:43,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 346.8ms TimeCoverageRelationStatistics Valid=509, Invalid=973, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:09:43,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44126 states. [2021-06-05 04:09:43,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44126 to 42198. [2021-06-05 04:09:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42198 states, 42197 states have (on average 3.0731331611251984) internal successors, (129677), 42197 states have internal predecessors, (129677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:44,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42198 states to 42198 states and 129677 transitions. [2021-06-05 04:09:44,113 INFO L78 Accepts]: Start accepts. Automaton has 42198 states and 129677 transitions. Word has length 22 [2021-06-05 04:09:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:44,113 INFO L482 AbstractCegarLoop]: Abstraction has 42198 states and 129677 transitions. [2021-06-05 04:09:44,113 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 04:09:44,113 INFO L276 IsEmpty]: Start isEmpty. Operand 42198 states and 129677 transitions. [2021-06-05 04:09:44,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:44,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:44,126 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:44,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9943,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:44,329 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:44,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:44,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1420323963, now seen corresponding path program 234 times [2021-06-05 04:09:44,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:44,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845755108] [2021-06-05 04:09:44,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:44,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:44,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845755108] [2021-06-05 04:09:44,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845755108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:44,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658157050] [2021-06-05 04:09:44,405 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 04:09:44,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:09:44,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:44,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:44,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:44,626 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 04:09:44,661 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 04:09:44,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658157050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:44,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:44,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:09:44,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177349618] [2021-06-05 04:09:44,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:09:44,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:44,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:09:44,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:09:44,662 INFO L87 Difference]: Start difference. First operand 42198 states and 129677 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 04:09:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:44,982 INFO L93 Difference]: Finished difference Result 46244 states and 141435 transitions. [2021-06-05 04:09:44,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:09:44,982 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 04:09:44,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:45,053 INFO L225 Difference]: With dead ends: 46244 [2021-06-05 04:09:45,053 INFO L226 Difference]: Without dead ends: 46244 [2021-06-05 04:09:45,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:09:45,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46244 states. [2021-06-05 04:09:45,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46244 to 45504. [2021-06-05 04:09:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45504 states, 45503 states have (on average 3.068566907676417) internal successors, (139629), 45503 states have internal predecessors, (139629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:46,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45504 states to 45504 states and 139629 transitions. [2021-06-05 04:09:46,055 INFO L78 Accepts]: Start accepts. Automaton has 45504 states and 139629 transitions. Word has length 22 [2021-06-05 04:09:46,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:46,055 INFO L482 AbstractCegarLoop]: Abstraction has 45504 states and 139629 transitions. [2021-06-05 04:09:46,055 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 04:09:46,055 INFO L276 IsEmpty]: Start isEmpty. Operand 45504 states and 139629 transitions. [2021-06-05 04:09:46,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:46,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:46,072 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:46,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9944,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:46,272 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:46,273 INFO L82 PathProgramCache]: Analyzing trace with hash 783857109, now seen corresponding path program 235 times [2021-06-05 04:09:46,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:46,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385513580] [2021-06-05 04:09:46,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:46,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:46,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385513580] [2021-06-05 04:09:46,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385513580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:46,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444754269] [2021-06-05 04:09:46,353 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 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 04:09:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:46,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:46,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:46,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444754269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:46,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:46,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:09:46,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6942972] [2021-06-05 04:09:46,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:09:46,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:46,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:09:46,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:09:46,425 INFO L87 Difference]: Start difference. First operand 45504 states and 139629 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 04:09:46,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:46,873 INFO L93 Difference]: Finished difference Result 47891 states and 146334 transitions. [2021-06-05 04:09:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:09:46,873 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 04:09:46,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:46,956 INFO L225 Difference]: With dead ends: 47891 [2021-06-05 04:09:46,957 INFO L226 Difference]: Without dead ends: 47891 [2021-06-05 04:09:46,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 291.2ms TimeCoverageRelationStatistics Valid=614, Invalid=1192, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:09:46,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47891 states. [2021-06-05 04:09:47,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47891 to 46839. [2021-06-05 04:09:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46839 states, 46838 states have (on average 3.066612579529442) internal successors, (143634), 46838 states have internal predecessors, (143634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:47,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46839 states to 46839 states and 143634 transitions. [2021-06-05 04:09:47,936 INFO L78 Accepts]: Start accepts. Automaton has 46839 states and 143634 transitions. Word has length 22 [2021-06-05 04:09:47,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:47,936 INFO L482 AbstractCegarLoop]: Abstraction has 46839 states and 143634 transitions. [2021-06-05 04:09:47,936 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 04:09:47,936 INFO L276 IsEmpty]: Start isEmpty. Operand 46839 states and 143634 transitions. [2021-06-05 04:09:47,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:47,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:47,953 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:48,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9945,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:48,153 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:48,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1486004305, now seen corresponding path program 236 times [2021-06-05 04:09:48,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:48,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450977187] [2021-06-05 04:09:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:48,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:48,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450977187] [2021-06-05 04:09:48,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450977187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:48,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192368896] [2021-06-05 04:09:48,207 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 04:09:48,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:09:48,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:48,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:48,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:48,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192368896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:48,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:48,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:09:48,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197276490] [2021-06-05 04:09:48,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:09:48,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:48,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:09:48,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:09:48,267 INFO L87 Difference]: Start difference. First operand 46839 states and 143634 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 04:09:48,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:48,554 INFO L93 Difference]: Finished difference Result 47040 states and 143931 transitions. [2021-06-05 04:09:48,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:09:48,555 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 04:09:48,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:48,633 INFO L225 Difference]: With dead ends: 47040 [2021-06-05 04:09:48,633 INFO L226 Difference]: Without dead ends: 47036 [2021-06-05 04:09:48,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:09:48,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47036 states. [2021-06-05 04:09:49,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47036 to 46875. [2021-06-05 04:09:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46875 states, 46874 states have (on average 3.066646755130776) internal successors, (143746), 46874 states have internal predecessors, (143746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:49,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46875 states to 46875 states and 143746 transitions. [2021-06-05 04:09:49,634 INFO L78 Accepts]: Start accepts. Automaton has 46875 states and 143746 transitions. Word has length 22 [2021-06-05 04:09:49,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:49,634 INFO L482 AbstractCegarLoop]: Abstraction has 46875 states and 143746 transitions. [2021-06-05 04:09:49,634 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 04:09:49,634 INFO L276 IsEmpty]: Start isEmpty. Operand 46875 states and 143746 transitions. [2021-06-05 04:09:49,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:49,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:49,650 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:49,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9946,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:49,850 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:49,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:49,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1091213931, now seen corresponding path program 237 times [2021-06-05 04:09:49,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:49,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642333290] [2021-06-05 04:09:49,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:49,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:49,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642333290] [2021-06-05 04:09:49,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642333290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:49,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055746417] [2021-06-05 04:09:49,905 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 04:09:49,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:09:49,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:49,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:49,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:49,969 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 04:09:49,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055746417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:49,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:49,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:09:49,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532142969] [2021-06-05 04:09:49,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:09:49,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:49,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:09:49,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:09:49,970 INFO L87 Difference]: Start difference. First operand 46875 states and 143746 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 04:09:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:50,191 INFO L93 Difference]: Finished difference Result 47717 states and 145917 transitions. [2021-06-05 04:09:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:09:50,192 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 04:09:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:50,266 INFO L225 Difference]: With dead ends: 47717 [2021-06-05 04:09:50,266 INFO L226 Difference]: Without dead ends: 47717 [2021-06-05 04:09:50,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:09:50,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47717 states. [2021-06-05 04:09:51,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47717 to 46880. [2021-06-05 04:09:51,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46880 states, 46879 states have (on average 3.066639646750144) internal successors, (143761), 46879 states have internal predecessors, (143761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46880 states to 46880 states and 143761 transitions. [2021-06-05 04:09:51,227 INFO L78 Accepts]: Start accepts. Automaton has 46880 states and 143761 transitions. Word has length 22 [2021-06-05 04:09:51,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:51,227 INFO L482 AbstractCegarLoop]: Abstraction has 46880 states and 143761 transitions. [2021-06-05 04:09:51,227 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 04:09:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 46880 states and 143761 transitions. [2021-06-05 04:09:51,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:51,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:51,245 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:51,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9947,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:51,445 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:51,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:51,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1474706031, now seen corresponding path program 238 times [2021-06-05 04:09:51,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:51,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432083930] [2021-06-05 04:09:51,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:51,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:51,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:51,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432083930] [2021-06-05 04:09:51,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432083930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:51,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949657096] [2021-06-05 04:09:51,501 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 04:09:51,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:09:51,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:51,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:51,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:51,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949657096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:51,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:51,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:09:51,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776904377] [2021-06-05 04:09:51,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:09:51,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:51,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:09:51,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:09:51,570 INFO L87 Difference]: Start difference. First operand 46880 states and 143761 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 04:09:51,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:51,828 INFO L93 Difference]: Finished difference Result 48348 states and 147772 transitions. [2021-06-05 04:09:51,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:09:51,829 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 04:09:51,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:51,905 INFO L225 Difference]: With dead ends: 48348 [2021-06-05 04:09:51,905 INFO L226 Difference]: Without dead ends: 48348 [2021-06-05 04:09:51,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:09:51,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48348 states. [2021-06-05 04:09:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48348 to 46887. [2021-06-05 04:09:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46887 states, 46886 states have (on average 3.066608369236019) internal successors, (143781), 46886 states have internal predecessors, (143781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:53,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46887 states to 46887 states and 143781 transitions. [2021-06-05 04:09:53,010 INFO L78 Accepts]: Start accepts. Automaton has 46887 states and 143781 transitions. Word has length 22 [2021-06-05 04:09:53,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:53,010 INFO L482 AbstractCegarLoop]: Abstraction has 46887 states and 143781 transitions. [2021-06-05 04:09:53,010 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 04:09:53,010 INFO L276 IsEmpty]: Start isEmpty. Operand 46887 states and 143781 transitions. [2021-06-05 04:09:53,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:53,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:53,028 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:53,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9948 [2021-06-05 04:09:53,229 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:53,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:53,229 INFO L82 PathProgramCache]: Analyzing trace with hash -586153771, now seen corresponding path program 239 times [2021-06-05 04:09:53,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:53,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958375622] [2021-06-05 04:09:53,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:53,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:53,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958375622] [2021-06-05 04:09:53,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958375622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:53,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595885229] [2021-06-05 04:09:53,298 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 04:09:53,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:09:53,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:53,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:53,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:53,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595885229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:53,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:53,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:09:53,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502948804] [2021-06-05 04:09:53,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:09:53,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:53,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:09:53,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:09:53,397 INFO L87 Difference]: Start difference. First operand 46887 states and 143781 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 04:09:53,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:53,737 INFO L93 Difference]: Finished difference Result 64639 states and 196977 transitions. [2021-06-05 04:09:53,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:09:53,738 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 04:09:53,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:53,859 INFO L225 Difference]: With dead ends: 64639 [2021-06-05 04:09:53,860 INFO L226 Difference]: Without dead ends: 64639 [2021-06-05 04:09:53,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:09:53,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64639 states. [2021-06-05 04:09:55,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64639 to 61565. [2021-06-05 04:09:55,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61565 states, 61564 states have (on average 3.058508219089078) internal successors, (188294), 61564 states have internal predecessors, (188294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:55,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61565 states to 61565 states and 188294 transitions. [2021-06-05 04:09:55,522 INFO L78 Accepts]: Start accepts. Automaton has 61565 states and 188294 transitions. Word has length 22 [2021-06-05 04:09:55,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:55,522 INFO L482 AbstractCegarLoop]: Abstraction has 61565 states and 188294 transitions. [2021-06-05 04:09:55,523 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 04:09:55,523 INFO L276 IsEmpty]: Start isEmpty. Operand 61565 states and 188294 transitions. [2021-06-05 04:09:55,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:55,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:55,540 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:55,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9949,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:55,741 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:55,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:55,741 INFO L82 PathProgramCache]: Analyzing trace with hash -48298193, now seen corresponding path program 240 times [2021-06-05 04:09:55,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:55,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425706649] [2021-06-05 04:09:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:55,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:55,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425706649] [2021-06-05 04:09:55,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425706649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:55,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825576571] [2021-06-05 04:09:55,812 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 04:09:55,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:09:55,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:55,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:55,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:55,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825576571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:55,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:55,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:09:55,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864607807] [2021-06-05 04:09:55,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:09:55,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:55,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:09:55,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:09:55,884 INFO L87 Difference]: Start difference. First operand 61565 states and 188294 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 04:09:56,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:56,239 INFO L93 Difference]: Finished difference Result 64066 states and 195284 transitions. [2021-06-05 04:09:56,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:09:56,240 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 04:09:56,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:56,369 INFO L225 Difference]: With dead ends: 64066 [2021-06-05 04:09:56,370 INFO L226 Difference]: Without dead ends: 64066 [2021-06-05 04:09:56,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:09:56,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64066 states. [2021-06-05 04:09:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64066 to 61726. [2021-06-05 04:09:57,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61726 states, 61725 states have (on average 3.0580639935196436) internal successors, (188759), 61725 states have internal predecessors, (188759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:57,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61726 states to 61726 states and 188759 transitions. [2021-06-05 04:09:57,767 INFO L78 Accepts]: Start accepts. Automaton has 61726 states and 188759 transitions. Word has length 22 [2021-06-05 04:09:57,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:57,767 INFO L482 AbstractCegarLoop]: Abstraction has 61726 states and 188759 transitions. [2021-06-05 04:09:57,767 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 04:09:57,767 INFO L276 IsEmpty]: Start isEmpty. Operand 61726 states and 188759 transitions. [2021-06-05 04:09:57,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:09:57,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:57,785 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:57,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9950 [2021-06-05 04:09:57,986 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:57,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:57,986 INFO L82 PathProgramCache]: Analyzing trace with hash -554644459, now seen corresponding path program 241 times [2021-06-05 04:09:57,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:57,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508876960] [2021-06-05 04:09:57,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:58,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:58,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508876960] [2021-06-05 04:09:58,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508876960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:58,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861843235] [2021-06-05 04:09:58,052 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 04:09:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:58,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:09:58,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:58,121 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 04:09:58,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861843235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:58,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:58,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:09:58,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613417419] [2021-06-05 04:09:58,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:09:58,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:58,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:09:58,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:09:58,122 INFO L87 Difference]: Start difference. First operand 61726 states and 188759 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 04:09:58,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:58,477 INFO L93 Difference]: Finished difference Result 73057 states and 222493 transitions. [2021-06-05 04:09:58,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:09:58,478 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 04:09:58,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:58,629 INFO L225 Difference]: With dead ends: 73057 [2021-06-05 04:09:58,629 INFO L226 Difference]: Without dead ends: 73057 [2021-06-05 04:09:58,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:09:58,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73057 states. [2021-06-05 04:10:00,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73057 to 71622. [2021-06-05 04:10:00,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71622 states, 71621 states have (on average 3.051926111056813) internal successors, (218582), 71621 states have internal predecessors, (218582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:00,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71622 states to 71622 states and 218582 transitions. [2021-06-05 04:10:00,388 INFO L78 Accepts]: Start accepts. Automaton has 71622 states and 218582 transitions. Word has length 22 [2021-06-05 04:10:00,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:00,388 INFO L482 AbstractCegarLoop]: Abstraction has 71622 states and 218582 transitions. [2021-06-05 04:10:00,388 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 04:10:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 71622 states and 218582 transitions. [2021-06-05 04:10:00,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:10:00,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:00,411 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:00,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9951 [2021-06-05 04:10:00,611 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:00,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:00,612 INFO L82 PathProgramCache]: Analyzing trace with hash 928490479, now seen corresponding path program 242 times [2021-06-05 04:10:00,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:00,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455810119] [2021-06-05 04:10:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:10:00,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:00,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455810119] [2021-06-05 04:10:00,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455810119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:00,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215565253] [2021-06-05 04:10:00,679 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 04:10:00,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:10:00,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:00,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:10:00,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:10:00,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215565253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:00,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:00,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:10:00,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334873944] [2021-06-05 04:10:00,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:10:00,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:00,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:10:00,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:10:00,749 INFO L87 Difference]: Start difference. First operand 71622 states and 218582 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 04:10:01,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:01,087 INFO L93 Difference]: Finished difference Result 76219 states and 232111 transitions. [2021-06-05 04:10:01,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:10:01,088 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 04:10:01,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:01,228 INFO L225 Difference]: With dead ends: 76219 [2021-06-05 04:10:01,228 INFO L226 Difference]: Without dead ends: 76219 [2021-06-05 04:10:01,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:10:01,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76219 states. [2021-06-05 04:10:02,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76219 to 75735. [2021-06-05 04:10:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75735 states, 75734 states have (on average 3.0491588982491353) internal successors, (230925), 75734 states have internal predecessors, (230925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:03,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75735 states to 75735 states and 230925 transitions. [2021-06-05 04:10:03,036 INFO L78 Accepts]: Start accepts. Automaton has 75735 states and 230925 transitions. Word has length 22 [2021-06-05 04:10:03,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:03,036 INFO L482 AbstractCegarLoop]: Abstraction has 75735 states and 230925 transitions. [2021-06-05 04:10:03,036 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 04:10:03,037 INFO L276 IsEmpty]: Start isEmpty. Operand 75735 states and 230925 transitions. [2021-06-05 04:10:03,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:10:03,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:03,060 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forcibly destroying the process [2021-06-05 04:10:03,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9952 [2021-06-05 04:10:03,379 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:03,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:03,380 INFO L82 PathProgramCache]: Analyzing trace with hash -338966699, now seen corresponding path program 243 times [2021-06-05 04:10:03,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:03,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116293063] [2021-06-05 04:10:03,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] The stream was forcibly closed: stdIn [2021-06-05 04:10:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:03,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:03,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116293063] [2021-06-05 04:10:03,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116293063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:03,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355642544] [2021-06-05 04:10:03,483 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 04:10:03,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:10:03,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:03,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:10:03,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:03,556 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 04:10:03,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355642544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:03,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:03,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:10:03,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469581870] [2021-06-05 04:10:03,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:03,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:03,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:03,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:03,557 INFO L87 Difference]: Start difference. First operand 75735 states and 230925 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 04:10:03,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:03,957 INFO L93 Difference]: Finished difference Result 76769 states and 233709 transitions. [2021-06-05 04:10:03,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:10:03,958 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 04:10:03,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:04,113 INFO L225 Difference]: With dead ends: 76769 [2021-06-05 04:10:04,113 INFO L226 Difference]: Without dead ends: 76769 [2021-06-05 04:10:04,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:10:04,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76769 states. [2021-06-05 04:10:05,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76769 to 75772. [2021-06-05 04:10:05,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75772 states, 75771 states have (on average 3.0491348932969076) internal successors, (231036), 75771 states have internal predecessors, (231036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75772 states to 75772 states and 231036 transitions. [2021-06-05 04:10:05,760 INFO L78 Accepts]: Start accepts. Automaton has 75772 states and 231036 transitions. Word has length 22 [2021-06-05 04:10:05,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:05,761 INFO L482 AbstractCegarLoop]: Abstraction has 75772 states and 231036 transitions. [2021-06-05 04:10:05,761 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 04:10:05,761 INFO L276 IsEmpty]: Start isEmpty. Operand 75772 states and 231036 transitions. [2021-06-05 04:10:05,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:10:05,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:05,782 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:05,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9953 [2021-06-05 04:10:05,982 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:05,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:05,982 INFO L82 PathProgramCache]: Analyzing trace with hash -975433553, now seen corresponding path program 244 times [2021-06-05 04:10:05,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:05,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5153354] [2021-06-05 04:10:05,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:06,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:06,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5153354] [2021-06-05 04:10:06,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5153354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:06,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615743551] [2021-06-05 04:10:06,066 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 04:10:06,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:10:06,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:06,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:10:06,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:06,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615743551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:06,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:06,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:10:06,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075429851] [2021-06-05 04:10:06,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:06,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:06,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:06,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:06,159 INFO L87 Difference]: Start difference. First operand 75772 states and 231036 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 04:10:06,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:06,943 INFO L93 Difference]: Finished difference Result 77589 states and 236129 transitions. [2021-06-05 04:10:06,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:10:06,943 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 04:10:06,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:07,102 INFO L225 Difference]: With dead ends: 77589 [2021-06-05 04:10:07,102 INFO L226 Difference]: Without dead ends: 77589 [2021-06-05 04:10:07,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:10:07,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77589 states. [2021-06-05 04:10:08,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77589 to 76898. [2021-06-05 04:10:08,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76898 states, 76897 states have (on average 3.048415412824948) internal successors, (234414), 76897 states have internal predecessors, (234414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:08,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76898 states to 76898 states and 234414 transitions. [2021-06-05 04:10:08,863 INFO L78 Accepts]: Start accepts. Automaton has 76898 states and 234414 transitions. Word has length 22 [2021-06-05 04:10:08,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:08,863 INFO L482 AbstractCegarLoop]: Abstraction has 76898 states and 234414 transitions. [2021-06-05 04:10:08,863 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 04:10:08,864 INFO L276 IsEmpty]: Start isEmpty. Operand 76898 states and 234414 transitions. [2021-06-05 04:10:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:10:08,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:08,890 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:09,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9954,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:09,091 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:09,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:09,091 INFO L82 PathProgramCache]: Analyzing trace with hash 768930453, now seen corresponding path program 245 times [2021-06-05 04:10:09,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:09,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080352950] [2021-06-05 04:10:09,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:09,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:09,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080352950] [2021-06-05 04:10:09,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080352950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:09,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643511711] [2021-06-05 04:10:09,177 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 04:10:09,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:10:09,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:09,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:10:09,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:09,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643511711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:09,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:09,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:10:09,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846255826] [2021-06-05 04:10:09,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:09,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:09,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:09,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:09,261 INFO L87 Difference]: Start difference. First operand 76898 states and 234414 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 04:10:09,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:09,854 INFO L93 Difference]: Finished difference Result 78959 states and 240117 transitions. [2021-06-05 04:10:09,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 04:10:09,854 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 04:10:09,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:09,996 INFO L225 Difference]: With dead ends: 78959 [2021-06-05 04:10:09,996 INFO L226 Difference]: Without dead ends: 78959 [2021-06-05 04:10:09,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=664, Invalid=1316, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:10:10,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78959 states. [2021-06-05 04:10:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78959 to 77340. [2021-06-05 04:10:11,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77340 states, 77339 states have (on average 3.048138713973545) internal successors, (235740), 77339 states have internal predecessors, (235740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:12,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77340 states to 77340 states and 235740 transitions. [2021-06-05 04:10:12,041 INFO L78 Accepts]: Start accepts. Automaton has 77340 states and 235740 transitions. Word has length 22 [2021-06-05 04:10:12,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:12,041 INFO L482 AbstractCegarLoop]: Abstraction has 77340 states and 235740 transitions. [2021-06-05 04:10:12,041 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 04:10:12,042 INFO L276 IsEmpty]: Start isEmpty. Operand 77340 states and 235740 transitions. [2021-06-05 04:10:12,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:10:12,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:12,069 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:12,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9955,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:12,288 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:12,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:12,290 INFO L82 PathProgramCache]: Analyzing trace with hash -928937975, now seen corresponding path program 246 times [2021-06-05 04:10:12,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:12,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641802609] [2021-06-05 04:10:12,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:12,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:12,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641802609] [2021-06-05 04:10:12,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641802609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:12,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102130403] [2021-06-05 04:10:12,396 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 04:10:12,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:10:12,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:12,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:10:12,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:12,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102130403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:12,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:12,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 04:10:12,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709949232] [2021-06-05 04:10:12,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:12,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:12,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:12,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:12,462 INFO L87 Difference]: Start difference. First operand 77340 states and 235740 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 04:10:13,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:13,016 INFO L93 Difference]: Finished difference Result 77569 states and 236048 transitions. [2021-06-05 04:10:13,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:10:13,017 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 04:10:13,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:13,164 INFO L225 Difference]: With dead ends: 77569 [2021-06-05 04:10:13,165 INFO L226 Difference]: Without dead ends: 77563 [2021-06-05 04:10:13,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:10:13,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77563 states. [2021-06-05 04:10:14,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77563 to 77255. [2021-06-05 04:10:14,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77255 states, 77254 states have (on average 3.0479198488104178) internal successors, (235464), 77254 states have internal predecessors, (235464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:15,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77255 states to 77255 states and 235464 transitions. [2021-06-05 04:10:15,389 INFO L78 Accepts]: Start accepts. Automaton has 77255 states and 235464 transitions. Word has length 22 [2021-06-05 04:10:15,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:15,389 INFO L482 AbstractCegarLoop]: Abstraction has 77255 states and 235464 transitions. [2021-06-05 04:10:15,389 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 04:10:15,389 INFO L276 IsEmpty]: Start isEmpty. Operand 77255 states and 235464 transitions. [2021-06-05 04:10:15,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:10:15,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:15,411 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:15,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9956,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:15,621 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:15,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:15,621 INFO L82 PathProgramCache]: Analyzing trace with hash -879550451, now seen corresponding path program 247 times [2021-06-05 04:10:15,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:15,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352662910] [2021-06-05 04:10:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:10:15,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:15,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352662910] [2021-06-05 04:10:15,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352662910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:15,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875574014] [2021-06-05 04:10:15,713 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 04:10:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:15,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:10:15,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:10:15,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875574014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:15,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:15,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 04:10:15,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391154653] [2021-06-05 04:10:15,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:15,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:15,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:15,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:15,791 INFO L87 Difference]: Start difference. First operand 77255 states and 235464 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 04:10:16,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:16,343 INFO L93 Difference]: Finished difference Result 105545 states and 320390 transitions. [2021-06-05 04:10:16,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:10:16,343 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 04:10:16,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:16,596 INFO L225 Difference]: With dead ends: 105545 [2021-06-05 04:10:16,597 INFO L226 Difference]: Without dead ends: 105545 [2021-06-05 04:10:16,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 225.8ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:10:16,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105545 states. [2021-06-05 04:10:18,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105545 to 103725. [2021-06-05 04:10:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103725 states, 103724 states have (on average 3.03849639427712) internal successors, (315165), 103724 states have internal predecessors, (315165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:19,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103725 states to 103725 states and 315165 transitions. [2021-06-05 04:10:19,037 INFO L78 Accepts]: Start accepts. Automaton has 103725 states and 315165 transitions. Word has length 22 [2021-06-05 04:10:19,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:19,037 INFO L482 AbstractCegarLoop]: Abstraction has 103725 states and 315165 transitions. [2021-06-05 04:10:19,037 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 04:10:19,037 INFO L276 IsEmpty]: Start isEmpty. Operand 103725 states and 315165 transitions. [2021-06-05 04:10:19,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:10:19,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:19,068 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:19,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9957,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:19,268 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:19,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:19,269 INFO L82 PathProgramCache]: Analyzing trace with hash 603584487, now seen corresponding path program 248 times [2021-06-05 04:10:19,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:19,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440769132] [2021-06-05 04:10:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:19,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:19,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440769132] [2021-06-05 04:10:19,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440769132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:19,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828595373] [2021-06-05 04:10:19,352 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 04:10:19,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:10:19,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:19,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:10:19,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:19,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828595373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:19,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:19,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:10:19,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816219305] [2021-06-05 04:10:19,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:10:19,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:19,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:10:19,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:10:19,434 INFO L87 Difference]: Start difference. First operand 103725 states and 315165 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 04:10:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:20,077 INFO L93 Difference]: Finished difference Result 114469 states and 347083 transitions. [2021-06-05 04:10:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:10:20,078 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 04:10:20,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:20,319 INFO L225 Difference]: With dead ends: 114469 [2021-06-05 04:10:20,320 INFO L226 Difference]: Without dead ends: 114469 [2021-06-05 04:10:20,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=445, Invalid=887, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:10:20,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114469 states. [2021-06-05 04:10:22,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114469 to 89851. [2021-06-05 04:10:22,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89851 states, 89850 states have (on average 3.041469115191987) internal successors, (273276), 89850 states have internal predecessors, (273276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:22,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89851 states to 89851 states and 273276 transitions. [2021-06-05 04:10:22,667 INFO L78 Accepts]: Start accepts. Automaton has 89851 states and 273276 transitions. Word has length 22 [2021-06-05 04:10:22,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:22,667 INFO L482 AbstractCegarLoop]: Abstraction has 89851 states and 273276 transitions. [2021-06-05 04:10:22,668 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 04:10:22,668 INFO L276 IsEmpty]: Start isEmpty. Operand 89851 states and 273276 transitions. [2021-06-05 04:10:22,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:10:22,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:22,692 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:22,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9958 [2021-06-05 04:10:22,892 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:22,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:22,893 INFO L82 PathProgramCache]: Analyzing trace with hash -663872691, now seen corresponding path program 249 times [2021-06-05 04:10:22,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:22,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734754963] [2021-06-05 04:10:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:22,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:22,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734754963] [2021-06-05 04:10:22,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734754963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:22,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876967558] [2021-06-05 04:10:22,981 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 04:10:23,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:10:23,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:23,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:10:23,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:23,065 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 04:10:23,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876967558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:23,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:23,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:10:23,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095352848] [2021-06-05 04:10:23,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:10:23,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:23,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:10:23,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:10:23,066 INFO L87 Difference]: Start difference. First operand 89851 states and 273276 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 04:10:24,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:24,213 INFO L93 Difference]: Finished difference Result 104983 states and 318293 transitions. [2021-06-05 04:10:24,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 04:10:24,214 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 04:10:24,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:24,451 INFO L225 Difference]: With dead ends: 104983 [2021-06-05 04:10:24,452 INFO L226 Difference]: Without dead ends: 104983 [2021-06-05 04:10:24,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 345.2ms TimeCoverageRelationStatistics Valid=732, Invalid=1430, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 04:10:24,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104983 states. [2021-06-05 04:10:26,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104983 to 90067. [2021-06-05 04:10:26,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90067 states, 90066 states have (on average 3.0419581196011816) internal successors, (273977), 90066 states have internal predecessors, (273977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:26,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90067 states to 90067 states and 273977 transitions. [2021-06-05 04:10:26,401 INFO L78 Accepts]: Start accepts. Automaton has 90067 states and 273977 transitions. Word has length 22 [2021-06-05 04:10:26,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:26,401 INFO L482 AbstractCegarLoop]: Abstraction has 90067 states and 273977 transitions. [2021-06-05 04:10:26,401 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 04:10:26,401 INFO L276 IsEmpty]: Start isEmpty. Operand 90067 states and 273977 transitions. [2021-06-05 04:10:26,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:10:26,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:26,428 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:26,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9959,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:26,629 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:26,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1300339545, now seen corresponding path program 250 times [2021-06-05 04:10:26,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:26,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627244125] [2021-06-05 04:10:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:26,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:26,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627244125] [2021-06-05 04:10:26,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627244125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:26,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256940497] [2021-06-05 04:10:26,741 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 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 04:10:26,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:10:26,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:26,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:10:26,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:26,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256940497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:26,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:26,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:10:26,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355941354] [2021-06-05 04:10:26,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:10:26,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:26,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:10:26,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:10:26,821 INFO L87 Difference]: Start difference. First operand 90067 states and 273977 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 04:10:27,257 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-06-05 04:10:28,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:28,061 INFO L93 Difference]: Finished difference Result 104672 states and 317280 transitions. [2021-06-05 04:10:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 04:10:28,061 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 04:10:28,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:28,292 INFO L225 Difference]: With dead ends: 104672 [2021-06-05 04:10:28,292 INFO L226 Difference]: Without dead ends: 104672 [2021-06-05 04:10:28,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 858.1ms TimeCoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 04:10:28,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104672 states. [2021-06-05 04:10:30,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104672 to 90821. [2021-06-05 04:10:30,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90821 states, 90820 states have (on average 3.041995155252147) internal successors, (276274), 90820 states have internal predecessors, (276274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:30,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90821 states to 90821 states and 276274 transitions. [2021-06-05 04:10:30,634 INFO L78 Accepts]: Start accepts. Automaton has 90821 states and 276274 transitions. Word has length 22 [2021-06-05 04:10:30,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:30,634 INFO L482 AbstractCegarLoop]: Abstraction has 90821 states and 276274 transitions. [2021-06-05 04:10:30,634 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 04:10:30,634 INFO L276 IsEmpty]: Start isEmpty. Operand 90821 states and 276274 transitions. [2021-06-05 04:10:30,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:10:30,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:30,657 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:30,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9960 [2021-06-05 04:10:30,858 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:30,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:30,858 INFO L82 PathProgramCache]: Analyzing trace with hash 632691635, now seen corresponding path program 251 times [2021-06-05 04:10:30,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:30,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194547202] [2021-06-05 04:10:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:30,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:30,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194547202] [2021-06-05 04:10:30,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194547202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:30,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231973566] [2021-06-05 04:10:30,941 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 04:10:30,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:10:30,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:30,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:10:30,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:31,022 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 04:10:31,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231973566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:31,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:31,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:10:31,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972630777] [2021-06-05 04:10:31,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:10:31,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:31,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:10:31,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:10:31,023 INFO L87 Difference]: Start difference. First operand 90821 states and 276274 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 04:10:31,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:31,736 INFO L93 Difference]: Finished difference Result 105621 states and 320343 transitions. [2021-06-05 04:10:31,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:10:31,737 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 04:10:31,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:31,968 INFO L225 Difference]: With dead ends: 105621 [2021-06-05 04:10:31,968 INFO L226 Difference]: Without dead ends: 105621 [2021-06-05 04:10:31,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 323.7ms TimeCoverageRelationStatistics Valid=670, Invalid=1310, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:10:32,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105621 states. [2021-06-05 04:10:34,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105621 to 87948. [2021-06-05 04:10:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87948 states, 87947 states have (on average 3.0435716965899915) internal successors, (267673), 87947 states have internal predecessors, (267673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:34,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87948 states to 87948 states and 267673 transitions. [2021-06-05 04:10:34,362 INFO L78 Accepts]: Start accepts. Automaton has 87948 states and 267673 transitions. Word has length 22 [2021-06-05 04:10:34,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:34,362 INFO L482 AbstractCegarLoop]: Abstraction has 87948 states and 267673 transitions. [2021-06-05 04:10:34,362 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 04:10:34,362 INFO L276 IsEmpty]: Start isEmpty. Operand 87948 states and 267673 transitions. [2021-06-05 04:10:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:10:34,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:34,393 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:34,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9961 [2021-06-05 04:10:34,594 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:34,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:34,595 INFO L82 PathProgramCache]: Analyzing trace with hash -3775219, now seen corresponding path program 252 times [2021-06-05 04:10:34,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:34,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740624891] [2021-06-05 04:10:34,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:34,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:34,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740624891] [2021-06-05 04:10:34,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740624891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:34,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771469223] [2021-06-05 04:10:34,685 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 04:10:34,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:10:34,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:34,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:10:34,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:34,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771469223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:34,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:34,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:10:34,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958456475] [2021-06-05 04:10:34,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:10:34,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:34,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:10:34,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:10:34,771 INFO L87 Difference]: Start difference. First operand 87948 states and 267673 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 04:10:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:35,582 INFO L93 Difference]: Finished difference Result 96355 states and 292373 transitions. [2021-06-05 04:10:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 04:10:35,583 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 04:10:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:35,771 INFO L225 Difference]: With dead ends: 96355 [2021-06-05 04:10:35,772 INFO L226 Difference]: Without dead ends: 96355 [2021-06-05 04:10:35,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 423.5ms TimeCoverageRelationStatistics Valid=929, Invalid=1827, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 04:10:35,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96355 states. [2021-06-05 04:10:37,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96355 to 89848. [2021-06-05 04:10:37,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89848 states, 89847 states have (on average 3.042728193484479) internal successors, (273380), 89847 states have internal predecessors, (273380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:38,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89848 states to 89848 states and 273380 transitions. [2021-06-05 04:10:38,139 INFO L78 Accepts]: Start accepts. Automaton has 89848 states and 273380 transitions. Word has length 22 [2021-06-05 04:10:38,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:38,139 INFO L482 AbstractCegarLoop]: Abstraction has 89848 states and 273380 transitions. [2021-06-05 04:10:38,139 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 04:10:38,139 INFO L276 IsEmpty]: Start isEmpty. Operand 89848 states and 273380 transitions. [2021-06-05 04:10:38,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:10:38,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:38,171 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:38,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9962,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:38,381 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:38,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:38,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1342276787, now seen corresponding path program 253 times [2021-06-05 04:10:38,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:38,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084866968] [2021-06-05 04:10:38,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:38,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:38,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084866968] [2021-06-05 04:10:38,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084866968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:38,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502960761] [2021-06-05 04:10:38,453 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 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 04:10:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:38,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:10:38,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:38,530 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 04:10:38,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502960761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:38,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:38,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 04:10:38,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035828299] [2021-06-05 04:10:38,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:38,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:38,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:38,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:38,531 INFO L87 Difference]: Start difference. First operand 89848 states and 273380 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 04:10:39,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:39,037 INFO L93 Difference]: Finished difference Result 91563 states and 278140 transitions. [2021-06-05 04:10:39,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:10:39,038 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 04:10:39,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:39,203 INFO L225 Difference]: With dead ends: 91563 [2021-06-05 04:10:39,203 INFO L226 Difference]: Without dead ends: 91563 [2021-06-05 04:10:39,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:10:39,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91563 states. [2021-06-05 04:10:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91563 to 85666. [2021-06-05 04:10:41,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85666 states, 85665 states have (on average 3.044347166287282) internal successors, (260794), 85665 states have internal predecessors, (260794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:41,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85666 states to 85666 states and 260794 transitions. [2021-06-05 04:10:41,260 INFO L78 Accepts]: Start accepts. Automaton has 85666 states and 260794 transitions. Word has length 22 [2021-06-05 04:10:41,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:41,261 INFO L482 AbstractCegarLoop]: Abstraction has 85666 states and 260794 transitions. [2021-06-05 04:10:41,261 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 04:10:41,261 INFO L276 IsEmpty]: Start isEmpty. Operand 85666 states and 260794 transitions. [2021-06-05 04:10:41,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:10:41,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:41,283 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:41,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9963 [2021-06-05 04:10:41,483 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:41,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:41,483 INFO L82 PathProgramCache]: Analyzing trace with hash 140858151, now seen corresponding path program 254 times [2021-06-05 04:10:41,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:41,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173215826] [2021-06-05 04:10:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:10:41,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:41,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173215826] [2021-06-05 04:10:41,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173215826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:41,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752858433] [2021-06-05 04:10:41,561 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 04:10:41,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:10:41,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:41,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:10:41,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:10:41,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752858433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:41,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:41,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 04:10:41,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512279166] [2021-06-05 04:10:41,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:41,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:41,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:41,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:41,646 INFO L87 Difference]: Start difference. First operand 85666 states and 260794 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 04:10:42,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:42,117 INFO L93 Difference]: Finished difference Result 90021 states and 273590 transitions. [2021-06-05 04:10:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:10:42,117 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 04:10:42,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:42,270 INFO L225 Difference]: With dead ends: 90021 [2021-06-05 04:10:42,270 INFO L226 Difference]: Without dead ends: 90021 [2021-06-05 04:10:42,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 206.5ms TimeCoverageRelationStatistics Valid=323, Invalid=733, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:10:42,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90021 states. [2021-06-05 04:10:44,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90021 to 89587. [2021-06-05 04:10:44,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89587 states, 89586 states have (on average 3.0424173419954013) internal successors, (272558), 89586 states have internal predecessors, (272558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:44,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89587 states to 89587 states and 272558 transitions. [2021-06-05 04:10:44,427 INFO L78 Accepts]: Start accepts. Automaton has 89587 states and 272558 transitions. Word has length 22 [2021-06-05 04:10:44,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:44,427 INFO L482 AbstractCegarLoop]: Abstraction has 89587 states and 272558 transitions. [2021-06-05 04:10:44,427 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 04:10:44,427 INFO L276 IsEmpty]: Start isEmpty. Operand 89587 states and 272558 transitions. [2021-06-05 04:10:44,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:10:44,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:44,453 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:44,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9964,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:44,654 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:44,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:44,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1126599027, now seen corresponding path program 255 times [2021-06-05 04:10:44,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:44,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070220390] [2021-06-05 04:10:44,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:44,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:44,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070220390] [2021-06-05 04:10:44,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070220390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:44,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616657203] [2021-06-05 04:10:44,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:10:44,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:10:44,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:44,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:10:44,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:44,833 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 04:10:44,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616657203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:44,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:44,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:10:44,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121666543] [2021-06-05 04:10:44,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:10:44,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:44,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:10:44,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:10:44,835 INFO L87 Difference]: Start difference. First operand 89587 states and 272558 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 04:10:45,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:45,420 INFO L93 Difference]: Finished difference Result 91085 states and 276674 transitions. [2021-06-05 04:10:45,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:10:45,420 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 04:10:45,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:45,582 INFO L225 Difference]: With dead ends: 91085 [2021-06-05 04:10:45,582 INFO L226 Difference]: Without dead ends: 91085 [2021-06-05 04:10:45,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:10:45,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91085 states. [2021-06-05 04:10:47,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91085 to 87184. [2021-06-05 04:10:47,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87184 states, 87183 states have (on average 3.043563538763291) internal successors, (265347), 87183 states have internal predecessors, (265347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:47,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87184 states to 87184 states and 265347 transitions. [2021-06-05 04:10:47,794 INFO L78 Accepts]: Start accepts. Automaton has 87184 states and 265347 transitions. Word has length 22 [2021-06-05 04:10:47,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:47,794 INFO L482 AbstractCegarLoop]: Abstraction has 87184 states and 265347 transitions. [2021-06-05 04:10:47,794 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 04:10:47,794 INFO L276 IsEmpty]: Start isEmpty. Operand 87184 states and 265347 transitions. [2021-06-05 04:10:47,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:10:47,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:47,818 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:48,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9965 [2021-06-05 04:10:48,019 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:48,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:48,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1763065881, now seen corresponding path program 256 times [2021-06-05 04:10:48,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:48,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362626003] [2021-06-05 04:10:48,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:48,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:48,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362626003] [2021-06-05 04:10:48,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362626003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:48,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58986412] [2021-06-05 04:10:48,108 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 04:10:48,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:10:48,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:48,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:10:48,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:48,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58986412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:48,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:48,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:10:48,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255266106] [2021-06-05 04:10:48,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:10:48,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:48,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:10:48,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:10:48,187 INFO L87 Difference]: Start difference. First operand 87184 states and 265347 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 04:10:48,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:48,829 INFO L93 Difference]: Finished difference Result 89148 states and 270843 transitions. [2021-06-05 04:10:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 04:10:48,829 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 04:10:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:49,003 INFO L225 Difference]: With dead ends: 89148 [2021-06-05 04:10:49,003 INFO L226 Difference]: Without dead ends: 89148 [2021-06-05 04:10:49,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 369.8ms TimeCoverageRelationStatistics Valid=790, Invalid=1562, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 04:10:49,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89148 states. [2021-06-05 04:10:50,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89148 to 87528. [2021-06-05 04:10:50,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87528 states, 87527 states have (on average 3.0433923246541066) internal successors, (266379), 87527 states have internal predecessors, (266379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87528 states to 87528 states and 266379 transitions. [2021-06-05 04:10:51,138 INFO L78 Accepts]: Start accepts. Automaton has 87528 states and 266379 transitions. Word has length 22 [2021-06-05 04:10:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:51,138 INFO L482 AbstractCegarLoop]: Abstraction has 87528 states and 266379 transitions. [2021-06-05 04:10:51,138 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 04:10:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 87528 states and 266379 transitions. [2021-06-05 04:10:51,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:10:51,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:51,160 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:51,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9966,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:51,361 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:51,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:51,361 INFO L82 PathProgramCache]: Analyzing trace with hash -18701875, now seen corresponding path program 257 times [2021-06-05 04:10:51,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:51,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490015408] [2021-06-05 04:10:51,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:51,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:51,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490015408] [2021-06-05 04:10:51,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490015408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:51,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622506631] [2021-06-05 04:10:51,451 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 04:10:51,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:10:51,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:51,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:10:51,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:51,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622506631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:51,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:51,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:10:51,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421638363] [2021-06-05 04:10:51,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:10:51,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:51,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:10:51,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:10:51,532 INFO L87 Difference]: Start difference. First operand 87528 states and 266379 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 04:10:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:52,191 INFO L93 Difference]: Finished difference Result 89118 states and 270691 transitions. [2021-06-05 04:10:52,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 04:10:52,192 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 04:10:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:52,373 INFO L225 Difference]: With dead ends: 89118 [2021-06-05 04:10:52,373 INFO L226 Difference]: Without dead ends: 89118 [2021-06-05 04:10:52,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 385.0ms TimeCoverageRelationStatistics Valid=807, Invalid=1643, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 04:10:52,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89118 states. [2021-06-05 04:10:54,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89118 to 87510. [2021-06-05 04:10:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87510 states, 87509 states have (on average 3.043401250157127) internal successors, (266325), 87509 states have internal predecessors, (266325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87510 states to 87510 states and 266325 transitions. [2021-06-05 04:10:54,534 INFO L78 Accepts]: Start accepts. Automaton has 87510 states and 266325 transitions. Word has length 22 [2021-06-05 04:10:54,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:54,534 INFO L482 AbstractCegarLoop]: Abstraction has 87510 states and 266325 transitions. [2021-06-05 04:10:54,534 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 04:10:54,534 INFO L276 IsEmpty]: Start isEmpty. Operand 87510 states and 266325 transitions. [2021-06-05 04:10:54,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:10:54,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:54,557 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:54,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9967,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:54,758 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:54,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:54,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1303353945, now seen corresponding path program 258 times [2021-06-05 04:10:54,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:54,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112756133] [2021-06-05 04:10:54,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:54,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:54,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112756133] [2021-06-05 04:10:54,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112756133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:54,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066674785] [2021-06-05 04:10:54,855 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 04:10:54,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 04:10:54,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:54,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:10:54,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:54,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066674785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:54,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:54,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 04:10:54,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392699338] [2021-06-05 04:10:54,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:10:54,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:54,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:10:54,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:10:54,922 INFO L87 Difference]: Start difference. First operand 87510 states and 266325 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 04:10:55,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:55,426 INFO L93 Difference]: Finished difference Result 87690 states and 266541 transitions. [2021-06-05 04:10:55,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:10:55,427 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 04:10:55,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:55,597 INFO L225 Difference]: With dead ends: 87690 [2021-06-05 04:10:55,597 INFO L226 Difference]: Without dead ends: 87686 [2021-06-05 04:10:55,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=313, Invalid=617, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:10:55,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87686 states. [2021-06-05 04:10:57,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87686 to 87508. [2021-06-05 04:10:57,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87508 states, 87507 states have (on average 3.0434250974207777) internal successors, (266321), 87507 states have internal predecessors, (266321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:57,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87508 states to 87508 states and 266321 transitions. [2021-06-05 04:10:57,803 INFO L78 Accepts]: Start accepts. Automaton has 87508 states and 266321 transitions. Word has length 22 [2021-06-05 04:10:57,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:57,803 INFO L482 AbstractCegarLoop]: Abstraction has 87508 states and 266321 transitions. [2021-06-05 04:10:57,803 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 04:10:57,803 INFO L276 IsEmpty]: Start isEmpty. Operand 87508 states and 266321 transitions. [2021-06-05 04:10:57,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:10:57,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:57,828 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:58,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9968,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:58,028 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:58,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:58,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1535013223, now seen corresponding path program 259 times [2021-06-05 04:10:58,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:58,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399754821] [2021-06-05 04:10:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:58,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:58,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399754821] [2021-06-05 04:10:58,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399754821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:58,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118203449] [2021-06-05 04:10:58,121 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 04:10:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:58,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:10:58,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:58,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118203449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:58,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:58,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-06-05 04:10:58,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021985413] [2021-06-05 04:10:58,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:10:58,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:58,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:10:58,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:10:58,211 INFO L87 Difference]: Start difference. First operand 87508 states and 266321 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 04:10:58,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:58,903 INFO L93 Difference]: Finished difference Result 97092 states and 294572 transitions. [2021-06-05 04:10:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 04:10:58,904 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 04:10:58,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:59,092 INFO L225 Difference]: With dead ends: 97092 [2021-06-05 04:10:59,092 INFO L226 Difference]: Without dead ends: 97092 [2021-06-05 04:10:59,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 386.4ms TimeCoverageRelationStatistics Valid=799, Invalid=1651, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 04:10:59,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97092 states. [2021-06-05 04:11:00,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97092 to 93336. [2021-06-05 04:11:01,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93336 states, 93335 states have (on average 3.0407457009696257) internal successors, (283808), 93335 states have internal predecessors, (283808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93336 states to 93336 states and 283808 transitions. [2021-06-05 04:11:01,293 INFO L78 Accepts]: Start accepts. Automaton has 93336 states and 283808 transitions. Word has length 22 [2021-06-05 04:11:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:01,293 INFO L482 AbstractCegarLoop]: Abstraction has 93336 states and 283808 transitions. [2021-06-05 04:11:01,293 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 04:11:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand 93336 states and 283808 transitions. [2021-06-05 04:11:01,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:11:01,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:01,324 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:01,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9969 [2021-06-05 04:11:01,525 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:01,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:01,525 INFO L82 PathProgramCache]: Analyzing trace with hash -224277439, now seen corresponding path program 260 times [2021-06-05 04:11:01,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:01,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794971537] [2021-06-05 04:11:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:01,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:01,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794971537] [2021-06-05 04:11:01,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794971537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:01,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651818065] [2021-06-05 04:11:01,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:11:01,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:11:01,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:01,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:11:01,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:01,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651818065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:01,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:01,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-06-05 04:11:01,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505412388] [2021-06-05 04:11:01,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:01,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:01,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:01,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:01,712 INFO L87 Difference]: Start difference. First operand 93336 states and 283808 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 04:11:02,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:02,382 INFO L93 Difference]: Finished difference Result 97575 states and 296111 transitions. [2021-06-05 04:11:02,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:11:02,382 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 04:11:02,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:03,013 INFO L225 Difference]: With dead ends: 97575 [2021-06-05 04:11:03,014 INFO L226 Difference]: Without dead ends: 97575 [2021-06-05 04:11:03,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=669, Invalid=1401, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 04:11:03,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97575 states. [2021-06-05 04:11:04,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97575 to 96000. [2021-06-05 04:11:04,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96000 states, 95999 states have (on average 3.0396149959895418) internal successors, (291800), 95999 states have internal predecessors, (291800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:04,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96000 states to 96000 states and 291800 transitions. [2021-06-05 04:11:04,866 INFO L78 Accepts]: Start accepts. Automaton has 96000 states and 291800 transitions. Word has length 22 [2021-06-05 04:11:04,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:04,867 INFO L482 AbstractCegarLoop]: Abstraction has 96000 states and 291800 transitions. [2021-06-05 04:11:04,867 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 04:11:04,867 INFO L276 IsEmpty]: Start isEmpty. Operand 96000 states and 291800 transitions. [2021-06-05 04:11:04,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:11:04,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:04,899 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:05,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9970,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:05,099 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:05,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:05,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1520086567, now seen corresponding path program 261 times [2021-06-05 04:11:05,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:05,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13299813] [2021-06-05 04:11:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:05,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:05,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13299813] [2021-06-05 04:11:05,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13299813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:05,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13836575] [2021-06-05 04:11:05,192 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 04:11:05,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:11:05,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:05,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:11:05,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:05,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13836575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:05,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:05,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-06-05 04:11:05,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267347840] [2021-06-05 04:11:05,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:05,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:05,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:05,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:05,281 INFO L87 Difference]: Start difference. First operand 96000 states and 291800 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 04:11:06,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:06,359 INFO L93 Difference]: Finished difference Result 98465 states and 298743 transitions. [2021-06-05 04:11:06,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:11:06,360 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 04:11:06,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:06,584 INFO L225 Difference]: With dead ends: 98465 [2021-06-05 04:11:06,584 INFO L226 Difference]: Without dead ends: 98465 [2021-06-05 04:11:06,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 362.3ms TimeCoverageRelationStatistics Valid=691, Invalid=1471, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 04:11:06,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98465 states. [2021-06-05 04:11:08,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98465 to 96553. [2021-06-05 04:11:08,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96553 states, 96552 states have (on average 3.0393881017482807) internal successors, (293459), 96552 states have internal predecessors, (293459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:08,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96553 states to 96553 states and 293459 transitions. [2021-06-05 04:11:08,567 INFO L78 Accepts]: Start accepts. Automaton has 96553 states and 293459 transitions. Word has length 22 [2021-06-05 04:11:08,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:08,567 INFO L482 AbstractCegarLoop]: Abstraction has 96553 states and 293459 transitions. [2021-06-05 04:11:08,567 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 04:11:08,567 INFO L276 IsEmpty]: Start isEmpty. Operand 96553 states and 293459 transitions. [2021-06-05 04:11:08,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:11:08,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:08,602 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:08,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9971 [2021-06-05 04:11:08,803 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:08,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:08,803 INFO L82 PathProgramCache]: Analyzing trace with hash -761242551, now seen corresponding path program 262 times [2021-06-05 04:11:08,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:08,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329483005] [2021-06-05 04:11:08,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:08,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:08,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329483005] [2021-06-05 04:11:08,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329483005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:08,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023565231] [2021-06-05 04:11:08,892 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 04:11:08,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:11:08,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:08,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:11:08,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:09,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023565231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:09,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:09,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-06-05 04:11:09,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844284544] [2021-06-05 04:11:09,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:11:09,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:09,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:11:09,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:11:09,340 INFO L87 Difference]: Start difference. First operand 96553 states and 293459 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 04:11:09,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:09,842 INFO L93 Difference]: Finished difference Result 96926 states and 294310 transitions. [2021-06-05 04:11:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:11:09,843 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 04:11:09,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:09,999 INFO L225 Difference]: With dead ends: 96926 [2021-06-05 04:11:09,999 INFO L226 Difference]: Without dead ends: 96924 [2021-06-05 04:11:09,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 541.5ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:11:10,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96924 states. [2021-06-05 04:11:11,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96924 to 96774. [2021-06-05 04:11:11,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96774 states, 96773 states have (on average 3.0395564878633503) internal successors, (294147), 96773 states have internal predecessors, (294147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:12,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96774 states to 96774 states and 294147 transitions. [2021-06-05 04:11:12,273 INFO L78 Accepts]: Start accepts. Automaton has 96774 states and 294147 transitions. Word has length 22 [2021-06-05 04:11:12,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:12,274 INFO L482 AbstractCegarLoop]: Abstraction has 96774 states and 294147 transitions. [2021-06-05 04:11:12,274 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 04:11:12,274 INFO L276 IsEmpty]: Start isEmpty. Operand 96774 states and 294147 transitions. [2021-06-05 04:11:12,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:11:12,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:12,301 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:12,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9972 [2021-06-05 04:11:12,502 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:12,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:12,502 INFO L82 PathProgramCache]: Analyzing trace with hash 956506509, now seen corresponding path program 263 times [2021-06-05 04:11:12,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:12,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913268277] [2021-06-05 04:11:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:12,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:12,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913268277] [2021-06-05 04:11:12,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913268277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:12,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472237807] [2021-06-05 04:11:12,600 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 04:11:12,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:11:12,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:12,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:11:12,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:11:12,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472237807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:12,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:12,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-06-05 04:11:12,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596727753] [2021-06-05 04:11:12,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:11:12,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:12,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:11:12,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:11:12,678 INFO L87 Difference]: Start difference. First operand 96774 states and 294147 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 04:11:13,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:13,170 INFO L93 Difference]: Finished difference Result 98650 states and 299438 transitions. [2021-06-05 04:11:13,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:11:13,170 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 04:11:13,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:13,372 INFO L225 Difference]: With dead ends: 98650 [2021-06-05 04:11:13,372 INFO L226 Difference]: Without dead ends: 98650 [2021-06-05 04:11:13,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 181.5ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:11:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98650 states. [2021-06-05 04:11:15,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98650 to 96776. [2021-06-05 04:11:15,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96776 states, 96775 states have (on average 3.0395556703694138) internal successors, (294153), 96775 states have internal predecessors, (294153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96776 states to 96776 states and 294153 transitions. [2021-06-05 04:11:15,610 INFO L78 Accepts]: Start accepts. Automaton has 96776 states and 294153 transitions. Word has length 22 [2021-06-05 04:11:15,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:15,610 INFO L482 AbstractCegarLoop]: Abstraction has 96776 states and 294153 transitions. [2021-06-05 04:11:15,610 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 04:11:15,610 INFO L276 IsEmpty]: Start isEmpty. Operand 96776 states and 294153 transitions. [2021-06-05 04:11:15,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:11:15,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:15,640 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:15,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9973 [2021-06-05 04:11:15,841 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:15,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:15,841 INFO L82 PathProgramCache]: Analyzing trace with hash -772540825, now seen corresponding path program 264 times [2021-06-05 04:11:15,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:15,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893521272] [2021-06-05 04:11:15,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:15,927 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:15,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:15,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893521272] [2021-06-05 04:11:15,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893521272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:15,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564800960] [2021-06-05 04:11:15,927 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 04:11:15,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:11:15,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:15,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:11:15,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:16,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564800960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:16,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:16,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-06-05 04:11:16,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320868435] [2021-06-05 04:11:16,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:11:16,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:16,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:11:16,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:11:16,010 INFO L87 Difference]: Start difference. First operand 96776 states and 294153 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 04:11:16,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:16,552 INFO L93 Difference]: Finished difference Result 100367 states and 304534 transitions. [2021-06-05 04:11:16,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:11:16,552 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 22 [2021-06-05 04:11:16,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:16,761 INFO L225 Difference]: With dead ends: 100367 [2021-06-05 04:11:16,761 INFO L226 Difference]: Without dead ends: 100367 [2021-06-05 04:11:16,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:11:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100367 states. [2021-06-05 04:11:18,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100367 to 96786. [2021-06-05 04:11:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96786 states, 96785 states have (on average 3.0395515834065194) internal successors, (294183), 96785 states have internal predecessors, (294183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:19,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96786 states to 96786 states and 294183 transitions. [2021-06-05 04:11:19,073 INFO L78 Accepts]: Start accepts. Automaton has 96786 states and 294183 transitions. Word has length 22 [2021-06-05 04:11:19,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:19,073 INFO L482 AbstractCegarLoop]: Abstraction has 96786 states and 294183 transitions. [2021-06-05 04:11:19,073 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 04:11:19,073 INFO L276 IsEmpty]: Start isEmpty. Operand 96786 states and 294183 transitions. [2021-06-05 04:11:19,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:11:19,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:19,114 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:19,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9974 [2021-06-05 04:11:19,315 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:19,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:19,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1461566669, now seen corresponding path program 265 times [2021-06-05 04:11:19,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:19,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205726203] [2021-06-05 04:11:19,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:19,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:19,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205726203] [2021-06-05 04:11:19,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205726203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:19,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229004073] [2021-06-05 04:11:19,419 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 04:11:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:19,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:11:19,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:19,496 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:19,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229004073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:19,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:19,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-06-05 04:11:19,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227987785] [2021-06-05 04:11:19,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:11:19,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:19,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:11:19,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:11:19,497 INFO L87 Difference]: Start difference. First operand 96786 states and 294183 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 04:11:20,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:20,073 INFO L93 Difference]: Finished difference Result 103852 states and 314875 transitions. [2021-06-05 04:11:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:11:20,073 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 22 [2021-06-05 04:11:20,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:20,276 INFO L225 Difference]: With dead ends: 103852 [2021-06-05 04:11:20,276 INFO L226 Difference]: Without dead ends: 103852 [2021-06-05 04:11:20,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 262.2ms TimeCoverageRelationStatistics Valid=443, Invalid=963, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:11:20,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103852 states. [2021-06-05 04:11:22,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103852 to 100467. [2021-06-05 04:11:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100467 states, 100466 states have (on average 3.0390181753030876) internal successors, (305318), 100466 states have internal predecessors, (305318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100467 states to 100467 states and 305318 transitions. [2021-06-05 04:11:22,731 INFO L78 Accepts]: Start accepts. Automaton has 100467 states and 305318 transitions. Word has length 22 [2021-06-05 04:11:22,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:22,731 INFO L482 AbstractCegarLoop]: Abstraction has 100467 states and 305318 transitions. [2021-06-05 04:11:22,731 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 04:11:22,731 INFO L276 IsEmpty]: Start isEmpty. Operand 100467 states and 305318 transitions. [2021-06-05 04:11:22,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:11:22,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:22,761 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:22,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9975 [2021-06-05 04:11:22,962 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:22,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:22,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1999422247, now seen corresponding path program 266 times [2021-06-05 04:11:22,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:22,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873758394] [2021-06-05 04:11:22,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:23,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:23,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873758394] [2021-06-05 04:11:23,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873758394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:23,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054179360] [2021-06-05 04:11:23,071 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 04:11:23,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:11:23,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:23,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:11:23,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:11:23,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054179360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:23,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:23,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-06-05 04:11:23,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192495978] [2021-06-05 04:11:23,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:11:23,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:23,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:11:23,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:11:23,152 INFO L87 Difference]: Start difference. First operand 100467 states and 305318 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 04:11:24,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:24,239 INFO L93 Difference]: Finished difference Result 117624 states and 356391 transitions. [2021-06-05 04:11:24,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:11:24,240 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 22 [2021-06-05 04:11:24,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:24,511 INFO L225 Difference]: With dead ends: 117624 [2021-06-05 04:11:24,512 INFO L226 Difference]: Without dead ends: 117624 [2021-06-05 04:11:24,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 297.8ms TimeCoverageRelationStatistics Valid=533, Invalid=1189, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:11:24,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117624 states. [2021-06-05 04:11:26,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117624 to 114603. [2021-06-05 04:11:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114603 states, 114602 states have (on average 3.0346416292909373) internal successors, (347776), 114602 states have internal predecessors, (347776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:27,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114603 states to 114603 states and 347776 transitions. [2021-06-05 04:11:27,224 INFO L78 Accepts]: Start accepts. Automaton has 114603 states and 347776 transitions. Word has length 22 [2021-06-05 04:11:27,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:27,225 INFO L482 AbstractCegarLoop]: Abstraction has 114603 states and 347776 transitions. [2021-06-05 04:11:27,225 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 04:11:27,225 INFO L276 IsEmpty]: Start isEmpty. Operand 114603 states and 347776 transitions. [2021-06-05 04:11:27,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:11:27,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:27,271 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:27,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9976,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:27,484 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:27,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:27,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1493075981, now seen corresponding path program 267 times [2021-06-05 04:11:27,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:27,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031045644] [2021-06-05 04:11:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:27,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:27,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031045644] [2021-06-05 04:11:27,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031045644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:27,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114462233] [2021-06-05 04:11:27,586 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 04:11:27,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:11:27,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:27,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:11:27,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:27,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114462233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:27,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:27,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-06-05 04:11:27,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174143441] [2021-06-05 04:11:27,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:27,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:27,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:27,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:27,696 INFO L87 Difference]: Start difference. First operand 114603 states and 347776 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 04:11:28,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:28,439 INFO L93 Difference]: Finished difference Result 117101 states and 354865 transitions. [2021-06-05 04:11:28,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:11:28,440 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 04:11:28,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:28,688 INFO L225 Difference]: With dead ends: 117101 [2021-06-05 04:11:28,688 INFO L226 Difference]: Without dead ends: 117101 [2021-06-05 04:11:28,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 345.5ms TimeCoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:11:28,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117101 states. [2021-06-05 04:11:30,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117101 to 114723. [2021-06-05 04:11:31,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114723 states, 114722 states have (on average 3.034596677184847) internal successors, (348135), 114722 states have internal predecessors, (348135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114723 states to 114723 states and 348135 transitions. [2021-06-05 04:11:31,381 INFO L78 Accepts]: Start accepts. Automaton has 114723 states and 348135 transitions. Word has length 22 [2021-06-05 04:11:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:31,381 INFO L482 AbstractCegarLoop]: Abstraction has 114723 states and 348135 transitions. [2021-06-05 04:11:31,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 04:11:31,381 INFO L276 IsEmpty]: Start isEmpty. Operand 114723 states and 348135 transitions. [2021-06-05 04:11:31,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:11:31,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:31,416 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:31,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9977,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:31,616 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:31,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:31,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1318756377, now seen corresponding path program 268 times [2021-06-05 04:11:31,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:31,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595292756] [2021-06-05 04:11:31,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:31,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:31,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595292756] [2021-06-05 04:11:31,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595292756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:31,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812214659] [2021-06-05 04:11:31,704 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 04:11:31,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:11:31,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:31,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:11:31,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:32,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812214659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:32,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:32,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-06-05 04:11:32,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786545755] [2021-06-05 04:11:32,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:32,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:32,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:32,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:32,150 INFO L87 Difference]: Start difference. First operand 114723 states and 348135 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 04:11:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:32,856 INFO L93 Difference]: Finished difference Result 129613 states and 392477 transitions. [2021-06-05 04:11:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:11:32,856 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 04:11:32,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:33,124 INFO L225 Difference]: With dead ends: 129613 [2021-06-05 04:11:33,124 INFO L226 Difference]: Without dead ends: 129613 [2021-06-05 04:11:33,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 315.3ms TimeCoverageRelationStatistics Valid=441, Invalid=1041, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:11:33,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129613 states. [2021-06-05 04:11:35,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129613 to 128238. [2021-06-05 04:11:35,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128238 states, 128237 states have (on average 3.0310128901954974) internal successors, (388688), 128237 states have internal predecessors, (388688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:35,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128238 states to 128238 states and 388688 transitions. [2021-06-05 04:11:35,946 INFO L78 Accepts]: Start accepts. Automaton has 128238 states and 388688 transitions. Word has length 22 [2021-06-05 04:11:35,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:35,946 INFO L482 AbstractCegarLoop]: Abstraction has 128238 states and 388688 transitions. [2021-06-05 04:11:35,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 04:11:35,946 INFO L276 IsEmpty]: Start isEmpty. Operand 128238 states and 388688 transitions. [2021-06-05 04:11:35,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:11:35,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:35,981 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:36,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9978,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:36,181 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:36,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:36,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1708753741, now seen corresponding path program 269 times [2021-06-05 04:11:36,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:36,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818208941] [2021-06-05 04:11:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:36,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:36,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818208941] [2021-06-05 04:11:36,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818208941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:36,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871823059] [2021-06-05 04:11:36,271 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 04:11:36,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:11:36,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:36,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:11:36,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:11:36,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871823059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:36,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:36,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-06-05 04:11:36,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505596470] [2021-06-05 04:11:36,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:36,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:36,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:36,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:36,366 INFO L87 Difference]: Start difference. First operand 128238 states and 388688 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 04:11:37,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:37,516 INFO L93 Difference]: Finished difference Result 131498 states and 398224 transitions. [2021-06-05 04:11:37,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:11:37,516 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 04:11:37,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:37,800 INFO L225 Difference]: With dead ends: 131498 [2021-06-05 04:11:37,800 INFO L226 Difference]: Without dead ends: 131498 [2021-06-05 04:11:37,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:11:37,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131498 states. [2021-06-05 04:11:40,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131498 to 130639. [2021-06-05 04:11:40,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130639 states, 130638 states have (on average 3.0304429032900075) internal successors, (395891), 130638 states have internal predecessors, (395891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:40,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130639 states to 130639 states and 395891 transitions. [2021-06-05 04:11:40,485 INFO L78 Accepts]: Start accepts. Automaton has 130639 states and 395891 transitions. Word has length 22 [2021-06-05 04:11:40,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:40,485 INFO L482 AbstractCegarLoop]: Abstraction has 130639 states and 395891 transitions. [2021-06-05 04:11:40,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 04:11:40,486 INFO L276 IsEmpty]: Start isEmpty. Operand 130639 states and 395891 transitions. [2021-06-05 04:11:40,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:11:40,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:40,518 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:40,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9979,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:40,721 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:40,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:40,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1072286887, now seen corresponding path program 270 times [2021-06-05 04:11:40,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:40,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27654534] [2021-06-05 04:11:40,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:40,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:40,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27654534] [2021-06-05 04:11:40,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27654534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:40,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186442979] [2021-06-05 04:11:40,821 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 04:11:40,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:11:40,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:40,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:11:40,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:40,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186442979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:40,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:40,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-06-05 04:11:40,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508116263] [2021-06-05 04:11:40,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:11:40,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:40,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:11:40,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:11:40,937 INFO L87 Difference]: Start difference. First operand 130639 states and 395891 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 04:11:42,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:42,193 INFO L93 Difference]: Finished difference Result 132410 states and 400904 transitions. [2021-06-05 04:11:42,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:11:42,194 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 04:11:42,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:42,478 INFO L225 Difference]: With dead ends: 132410 [2021-06-05 04:11:42,478 INFO L226 Difference]: Without dead ends: 132410 [2021-06-05 04:11:42,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 323.7ms TimeCoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:11:42,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132410 states. [2021-06-05 04:11:44,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132410 to 130698. [2021-06-05 04:11:44,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130698 states, 130697 states have (on average 3.030429160577519) internal successors, (396068), 130697 states have internal predecessors, (396068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:45,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130698 states to 130698 states and 396068 transitions. [2021-06-05 04:11:45,133 INFO L78 Accepts]: Start accepts. Automaton has 130698 states and 396068 transitions. Word has length 22 [2021-06-05 04:11:45,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:45,133 INFO L482 AbstractCegarLoop]: Abstraction has 130698 states and 396068 transitions. [2021-06-05 04:11:45,133 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 04:11:45,133 INFO L276 IsEmpty]: Start isEmpty. Operand 130698 states and 396068 transitions. [2021-06-05 04:11:45,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:11:45,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:45,173 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:45,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9980,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:45,377 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:45,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:45,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1478316403, now seen corresponding path program 271 times [2021-06-05 04:11:45,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:45,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439751825] [2021-06-05 04:11:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:45,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:45,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439751825] [2021-06-05 04:11:45,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439751825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:45,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232689753] [2021-06-05 04:11:45,477 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 04:11:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:45,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:11:45,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:45,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232689753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:45,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:45,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-06-05 04:11:45,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794012585] [2021-06-05 04:11:45,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:11:45,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:45,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:11:45,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:11:45,587 INFO L87 Difference]: Start difference. First operand 130698 states and 396068 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 04:11:46,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:46,962 INFO L93 Difference]: Finished difference Result 132757 states and 401917 transitions. [2021-06-05 04:11:46,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:11:46,963 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 04:11:46,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:47,235 INFO L225 Difference]: With dead ends: 132757 [2021-06-05 04:11:47,235 INFO L226 Difference]: Without dead ends: 132757 [2021-06-05 04:11:47,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 377.0ms TimeCoverageRelationStatistics Valid=507, Invalid=1215, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:11:47,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132757 states. [2021-06-05 04:11:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132757 to 131013. [2021-06-05 04:11:49,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131013 states, 131012 states have (on average 3.0303559979238543) internal successors, (397013), 131012 states have internal predecessors, (397013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131013 states to 131013 states and 397013 transitions. [2021-06-05 04:11:49,818 INFO L78 Accepts]: Start accepts. Automaton has 131013 states and 397013 transitions. Word has length 22 [2021-06-05 04:11:49,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:49,819 INFO L482 AbstractCegarLoop]: Abstraction has 131013 states and 397013 transitions. [2021-06-05 04:11:49,819 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 04:11:49,819 INFO L276 IsEmpty]: Start isEmpty. Operand 131013 states and 397013 transitions. [2021-06-05 04:11:49,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:11:49,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:49,852 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:50,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9981 [2021-06-05 04:11:50,052 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:50,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1057360231, now seen corresponding path program 272 times [2021-06-05 04:11:50,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:50,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906318364] [2021-06-05 04:11:50,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:50,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:50,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906318364] [2021-06-05 04:11:50,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906318364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:50,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714190498] [2021-06-05 04:11:50,153 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 04:11:50,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:11:50,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:50,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:11:50,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:50,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714190498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:50,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:50,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-06-05 04:11:50,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145102845] [2021-06-05 04:11:50,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:11:50,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:50,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:11:50,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:11:50,270 INFO L87 Difference]: Start difference. First operand 131013 states and 397013 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 04:11:51,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:51,654 INFO L93 Difference]: Finished difference Result 135540 states and 410128 transitions. [2021-06-05 04:11:51,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 04:11:51,655 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 04:11:51,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:51,937 INFO L225 Difference]: With dead ends: 135540 [2021-06-05 04:11:51,937 INFO L226 Difference]: Without dead ends: 135540 [2021-06-05 04:11:51,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 417.0ms TimeCoverageRelationStatistics Valid=851, Invalid=1905, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 04:11:52,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135540 states. [2021-06-05 04:11:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135540 to 131079. [2021-06-05 04:11:54,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131079 states, 131078 states have (on average 3.0303407131631546) internal successors, (397211), 131078 states have internal predecessors, (397211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131079 states to 131079 states and 397211 transitions. [2021-06-05 04:11:54,570 INFO L78 Accepts]: Start accepts. Automaton has 131079 states and 397211 transitions. Word has length 22 [2021-06-05 04:11:54,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:54,570 INFO L482 AbstractCegarLoop]: Abstraction has 131079 states and 397211 transitions. [2021-06-05 04:11:54,570 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 04:11:54,571 INFO L276 IsEmpty]: Start isEmpty. Operand 131079 states and 397211 transitions. [2021-06-05 04:11:54,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:11:54,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:54,616 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:54,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9982,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:54,817 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:54,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:54,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1384664402, now seen corresponding path program 273 times [2021-06-05 04:11:54,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:54,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540050447] [2021-06-05 04:11:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:54,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:54,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540050447] [2021-06-05 04:11:54,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540050447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:54,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014530473] [2021-06-05 04:11:54,930 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 04:11:54,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:11:54,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:54,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:11:54,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:55,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014530473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:55,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:55,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 04:11:55,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968853466] [2021-06-05 04:11:55,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:11:55,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:55,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:11:55,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:11:55,008 INFO L87 Difference]: Start difference. First operand 131079 states and 397211 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 04:11:56,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:56,149 INFO L93 Difference]: Finished difference Result 131316 states and 397574 transitions. [2021-06-05 04:11:56,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:11:56,149 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 24 [2021-06-05 04:11:56,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:56,443 INFO L225 Difference]: With dead ends: 131316 [2021-06-05 04:11:56,443 INFO L226 Difference]: Without dead ends: 131310 [2021-06-05 04:11:56,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 202.6ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:11:56,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131310 states. [2021-06-05 04:11:58,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131310 to 131104. [2021-06-05 04:11:58,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.0301594929177824) internal successors, (397263), 131103 states have internal predecessors, (397263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:59,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397263 transitions. [2021-06-05 04:11:59,044 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397263 transitions. Word has length 24 [2021-06-05 04:11:59,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:59,044 INFO L482 AbstractCegarLoop]: Abstraction has 131104 states and 397263 transitions. [2021-06-05 04:11:59,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 04:11:59,044 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397263 transitions. [2021-06-05 04:11:59,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:11:59,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:59,087 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:59,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9983 [2021-06-05 04:11:59,288 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:59,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:59,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1036551628, now seen corresponding path program 274 times [2021-06-05 04:11:59,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:59,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449009198] [2021-06-05 04:11:59,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:59,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:59,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449009198] [2021-06-05 04:11:59,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449009198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:59,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941317309] [2021-06-05 04:11:59,372 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 04:11:59,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:11:59,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:59,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:11:59,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:11:59,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941317309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:59,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:59,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 19 [2021-06-05 04:11:59,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768997837] [2021-06-05 04:11:59,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:11:59,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:59,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:11:59,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:11:59,474 INFO L87 Difference]: Start difference. First operand 131104 states and 397263 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 04:12:00,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:00,070 INFO L93 Difference]: Finished difference Result 131229 states and 397402 transitions. [2021-06-05 04:12:00,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:12:00,071 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 24 [2021-06-05 04:12:00,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:00,921 INFO L225 Difference]: With dead ends: 131229 [2021-06-05 04:12:00,922 INFO L226 Difference]: Without dead ends: 131229 [2021-06-05 04:12:00,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:12:00,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131229 states. [2021-06-05 04:12:02,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131229 to 131082. [2021-06-05 04:12:03,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131082 states, 131081 states have (on average 3.0302637300600392) internal successors, (397210), 131081 states have internal predecessors, (397210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:03,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131082 states to 131082 states and 397210 transitions. [2021-06-05 04:12:03,443 INFO L78 Accepts]: Start accepts. Automaton has 131082 states and 397210 transitions. Word has length 24 [2021-06-05 04:12:03,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:03,443 INFO L482 AbstractCegarLoop]: Abstraction has 131082 states and 397210 transitions. [2021-06-05 04:12:03,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 04:12:03,444 INFO L276 IsEmpty]: Start isEmpty. Operand 131082 states and 397210 transitions. [2021-06-05 04:12:03,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:12:03,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:03,488 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:03,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9984 [2021-06-05 04:12:03,689 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:03,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:03,689 INFO L82 PathProgramCache]: Analyzing trace with hash -757952152, now seen corresponding path program 275 times [2021-06-05 04:12:03,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:03,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890163648] [2021-06-05 04:12:03,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:03,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:03,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890163648] [2021-06-05 04:12:03,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890163648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:03,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784234866] [2021-06-05 04:12:03,769 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 04:12:03,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:12:03,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:03,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:12:03,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 75 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:12:03,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784234866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:03,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:03,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 19 [2021-06-05 04:12:03,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827953614] [2021-06-05 04:12:03,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:12:03,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:03,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:12:03,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:12:03,873 INFO L87 Difference]: Start difference. First operand 131082 states and 397210 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 04:12:04,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:04,461 INFO L93 Difference]: Finished difference Result 131237 states and 397440 transitions. [2021-06-05 04:12:04,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:12:04,462 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 24 [2021-06-05 04:12:04,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:04,739 INFO L225 Difference]: With dead ends: 131237 [2021-06-05 04:12:04,740 INFO L226 Difference]: Without dead ends: 131237 [2021-06-05 04:12:04,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:12:04,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131237 states. [2021-06-05 04:12:07,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131237 to 131093. [2021-06-05 04:12:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.0302077930003355) internal successors, (397236), 131092 states have internal predecessors, (397236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 397236 transitions. [2021-06-05 04:12:08,049 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 397236 transitions. Word has length 24 [2021-06-05 04:12:08,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:08,049 INFO L482 AbstractCegarLoop]: Abstraction has 131093 states and 397236 transitions. [2021-06-05 04:12:08,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 04:12:08,050 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 397236 transitions. [2021-06-05 04:12:08,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:12:08,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:08,092 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:08,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9985 [2021-06-05 04:12:08,292 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:08,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:08,293 INFO L82 PathProgramCache]: Analyzing trace with hash -711302988, now seen corresponding path program 276 times [2021-06-05 04:12:08,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:08,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39019456] [2021-06-05 04:12:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:08,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:08,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39019456] [2021-06-05 04:12:08,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39019456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:08,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177597989] [2021-06-05 04:12:08,376 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 04:12:08,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:12:08,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:08,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:12:08,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:08,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177597989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:08,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:08,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:12:08,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588890309] [2021-06-05 04:12:08,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:12:08,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:08,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:12:08,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:12:08,456 INFO L87 Difference]: Start difference. First operand 131093 states and 397236 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 04:12:09,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:09,042 INFO L93 Difference]: Finished difference Result 131154 states and 397359 transitions. [2021-06-05 04:12:09,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:12:09,042 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 24 [2021-06-05 04:12:09,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:09,308 INFO L225 Difference]: With dead ends: 131154 [2021-06-05 04:12:09,308 INFO L226 Difference]: Without dead ends: 131153 [2021-06-05 04:12:09,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:12:09,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131153 states. [2021-06-05 04:12:11,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131153 to 131093. [2021-06-05 04:12:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.030184908308669) internal successors, (397233), 131092 states have internal predecessors, (397233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:12,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 397233 transitions. [2021-06-05 04:12:12,116 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 397233 transitions. Word has length 24 [2021-06-05 04:12:12,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:12,116 INFO L482 AbstractCegarLoop]: Abstraction has 131093 states and 397233 transitions. [2021-06-05 04:12:12,116 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 04:12:12,116 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 397233 transitions. [2021-06-05 04:12:12,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:12:12,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:12,159 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:12,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9986 [2021-06-05 04:12:12,585 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:12,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:12,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1157400778, now seen corresponding path program 277 times [2021-06-05 04:12:12,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:12,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516452913] [2021-06-05 04:12:12,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:12:12,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:12,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516452913] [2021-06-05 04:12:12,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516452913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:12,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147613247] [2021-06-05 04:12:12,734 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 04:12:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:12,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:12:12,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:12:12,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147613247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:12,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:12,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:12:12,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145118383] [2021-06-05 04:12:12,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:12:12,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:12,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:12:12,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:12:12,835 INFO L87 Difference]: Start difference. First operand 131093 states and 397233 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 04:12:13,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:13,345 INFO L93 Difference]: Finished difference Result 131454 states and 397901 transitions. [2021-06-05 04:12:13,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:12:13,345 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 24 [2021-06-05 04:12:13,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:13,626 INFO L225 Difference]: With dead ends: 131454 [2021-06-05 04:12:13,626 INFO L226 Difference]: Without dead ends: 131452 [2021-06-05 04:12:13,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:12:13,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131452 states. [2021-06-05 04:12:16,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131452 to 131181. [2021-06-05 04:12:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131181 states, 131180 states have (on average 3.0299893276414087) internal successors, (397474), 131180 states have internal predecessors, (397474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:16,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131181 states to 131181 states and 397474 transitions. [2021-06-05 04:12:16,653 INFO L78 Accepts]: Start accepts. Automaton has 131181 states and 397474 transitions. Word has length 24 [2021-06-05 04:12:16,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:16,653 INFO L482 AbstractCegarLoop]: Abstraction has 131181 states and 397474 transitions. [2021-06-05 04:12:16,653 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 04:12:16,653 INFO L276 IsEmpty]: Start isEmpty. Operand 131181 states and 397474 transitions. [2021-06-05 04:12:16,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:12:16,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:16,694 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:16,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9987,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:16,894 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:16,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:16,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1392111828, now seen corresponding path program 278 times [2021-06-05 04:12:16,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:16,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115751833] [2021-06-05 04:12:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:12:16,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:16,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115751833] [2021-06-05 04:12:16,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115751833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:16,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355885698] [2021-06-05 04:12:16,957 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 04:12:16,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:12:16,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:16,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:12:16,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:12:17,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355885698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:17,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:17,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 04:12:17,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741509542] [2021-06-05 04:12:17,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:12:17,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:17,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:12:17,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:12:17,032 INFO L87 Difference]: Start difference. First operand 131181 states and 397474 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 04:12:18,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:18,108 INFO L93 Difference]: Finished difference Result 131473 states and 397928 transitions. [2021-06-05 04:12:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:12:18,109 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 24 [2021-06-05 04:12:18,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:18,377 INFO L225 Difference]: With dead ends: 131473 [2021-06-05 04:12:18,377 INFO L226 Difference]: Without dead ends: 131464 [2021-06-05 04:12:18,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:12:18,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131464 states. [2021-06-05 04:12:20,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131464 to 131129. [2021-06-05 04:12:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131129 states, 131128 states have (on average 3.030046976999573) internal successors, (397324), 131128 states have internal predecessors, (397324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:21,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131129 states to 131129 states and 397324 transitions. [2021-06-05 04:12:21,226 INFO L78 Accepts]: Start accepts. Automaton has 131129 states and 397324 transitions. Word has length 24 [2021-06-05 04:12:21,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:21,226 INFO L482 AbstractCegarLoop]: Abstraction has 131129 states and 397324 transitions. [2021-06-05 04:12:21,226 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 04:12:21,226 INFO L276 IsEmpty]: Start isEmpty. Operand 131129 states and 397324 transitions. [2021-06-05 04:12:21,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:12:21,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:21,269 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:21,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9988,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:21,470 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:21,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:21,470 INFO L82 PathProgramCache]: Analyzing trace with hash 318501480, now seen corresponding path program 279 times [2021-06-05 04:12:21,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:21,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48954471] [2021-06-05 04:12:21,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:21,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:21,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48954471] [2021-06-05 04:12:21,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48954471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:21,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721294539] [2021-06-05 04:12:21,548 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 04:12:21,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:12:21,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:21,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:12:21,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:12:21,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721294539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:21,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:21,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:12:21,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713297452] [2021-06-05 04:12:21,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:12:21,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:21,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:12:21,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:12:21,616 INFO L87 Difference]: Start difference. First operand 131129 states and 397324 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 04:12:22,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:22,805 INFO L93 Difference]: Finished difference Result 131345 states and 397633 transitions. [2021-06-05 04:12:22,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:12:22,805 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 24 [2021-06-05 04:12:22,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:23,075 INFO L225 Difference]: With dead ends: 131345 [2021-06-05 04:12:23,075 INFO L226 Difference]: Without dead ends: 131343 [2021-06-05 04:12:23,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:12:23,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131343 states. [2021-06-05 04:12:25,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131343 to 131121. [2021-06-05 04:12:25,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131121 states, 131120 states have (on average 3.0300030506406346) internal successors, (397294), 131120 states have internal predecessors, (397294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131121 states to 131121 states and 397294 transitions. [2021-06-05 04:12:25,732 INFO L78 Accepts]: Start accepts. Automaton has 131121 states and 397294 transitions. Word has length 24 [2021-06-05 04:12:25,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:25,732 INFO L482 AbstractCegarLoop]: Abstraction has 131121 states and 397294 transitions. [2021-06-05 04:12:25,732 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 04:12:25,732 INFO L276 IsEmpty]: Start isEmpty. Operand 131121 states and 397294 transitions. [2021-06-05 04:12:25,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:12:25,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:25,772 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:25,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9989,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:25,973 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:25,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:25,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1807906476, now seen corresponding path program 280 times [2021-06-05 04:12:25,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:25,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176299332] [2021-06-05 04:12:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:26,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:26,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176299332] [2021-06-05 04:12:26,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176299332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:26,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027304449] [2021-06-05 04:12:26,051 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 04:12:26,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:12:26,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:26,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:12:26,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 58 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:12:26,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027304449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:26,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:26,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-06-05 04:12:26,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654307870] [2021-06-05 04:12:26,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:12:26,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:26,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:12:26,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:12:26,116 INFO L87 Difference]: Start difference. First operand 131121 states and 397294 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 04:12:26,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:26,792 INFO L93 Difference]: Finished difference Result 131339 states and 397604 transitions. [2021-06-05 04:12:26,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:12:26,793 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 24 [2021-06-05 04:12:26,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:27,826 INFO L225 Difference]: With dead ends: 131339 [2021-06-05 04:12:27,826 INFO L226 Difference]: Without dead ends: 131336 [2021-06-05 04:12:27,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:12:27,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131336 states. [2021-06-05 04:12:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131336 to 131113. [2021-06-05 04:12:29,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131113 states, 131112 states have (on average 3.0299667459881627) internal successors, (397265), 131112 states have internal predecessors, (397265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:30,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131113 states to 131113 states and 397265 transitions. [2021-06-05 04:12:30,732 INFO L78 Accepts]: Start accepts. Automaton has 131113 states and 397265 transitions. Word has length 24 [2021-06-05 04:12:30,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:30,732 INFO L482 AbstractCegarLoop]: Abstraction has 131113 states and 397265 transitions. [2021-06-05 04:12:30,732 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 04:12:30,732 INFO L276 IsEmpty]: Start isEmpty. Operand 131113 states and 397265 transitions. [2021-06-05 04:12:30,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:12:30,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:30,777 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:30,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9990 [2021-06-05 04:12:30,977 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:30,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:30,978 INFO L82 PathProgramCache]: Analyzing trace with hash 734821096, now seen corresponding path program 281 times [2021-06-05 04:12:30,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:30,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475422259] [2021-06-05 04:12:30,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:31,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:31,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475422259] [2021-06-05 04:12:31,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475422259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:31,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118345304] [2021-06-05 04:12:31,074 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 04:12:31,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 04:12:31,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:31,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:12:31,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:12:31,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118345304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:31,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:31,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 04:12:31,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549772658] [2021-06-05 04:12:31,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:12:31,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:31,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:12:31,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:12:31,150 INFO L87 Difference]: Start difference. First operand 131113 states and 397265 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 04:12:31,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:31,787 INFO L93 Difference]: Finished difference Result 131264 states and 397507 transitions. [2021-06-05 04:12:31,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:12:31,788 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 24 [2021-06-05 04:12:31,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:32,057 INFO L225 Difference]: With dead ends: 131264 [2021-06-05 04:12:32,057 INFO L226 Difference]: Without dead ends: 131259 [2021-06-05 04:12:32,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:12:32,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131259 states. [2021-06-05 04:12:34,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131259 to 131113. [2021-06-05 04:12:34,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131113 states, 131112 states have (on average 3.029920983586552) internal successors, (397259), 131112 states have internal predecessors, (397259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131113 states to 131113 states and 397259 transitions. [2021-06-05 04:12:35,424 INFO L78 Accepts]: Start accepts. Automaton has 131113 states and 397259 transitions. Word has length 24 [2021-06-05 04:12:35,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:35,424 INFO L482 AbstractCegarLoop]: Abstraction has 131113 states and 397259 transitions. [2021-06-05 04:12:35,424 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 04:12:35,424 INFO L276 IsEmpty]: Start isEmpty. Operand 131113 states and 397259 transitions. [2021-06-05 04:12:35,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:12:35,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:35,529 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:35,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9991 [2021-06-05 04:12:35,745 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:35,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:35,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1943482834, now seen corresponding path program 282 times [2021-06-05 04:12:35,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:35,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817000920] [2021-06-05 04:12:35,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:12:35,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:35,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817000920] [2021-06-05 04:12:35,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817000920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:35,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628215153] [2021-06-05 04:12:35,804 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 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 04:12:35,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 04:12:35,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:35,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:12:35,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:12:35,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628215153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:35,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:35,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:12:35,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430044893] [2021-06-05 04:12:35,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:12:35,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:35,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:12:35,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:12:35,877 INFO L87 Difference]: Start difference. First operand 131113 states and 397259 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 04:12:36,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:36,410 INFO L93 Difference]: Finished difference Result 131472 states and 397913 transitions. [2021-06-05 04:12:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:12:36,411 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 24 [2021-06-05 04:12:36,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:36,687 INFO L225 Difference]: With dead ends: 131472 [2021-06-05 04:12:36,687 INFO L226 Difference]: Without dead ends: 131470 [2021-06-05 04:12:36,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:12:36,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131470 states. [2021-06-05 04:12:39,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131470 to 131189. [2021-06-05 04:12:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131189 states, 131188 states have (on average 3.0296902155684973) internal successors, (397459), 131188 states have internal predecessors, (397459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131189 states to 131189 states and 397459 transitions. [2021-06-05 04:12:39,633 INFO L78 Accepts]: Start accepts. Automaton has 131189 states and 397459 transitions. Word has length 24 [2021-06-05 04:12:39,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:39,633 INFO L482 AbstractCegarLoop]: Abstraction has 131189 states and 397459 transitions. [2021-06-05 04:12:39,633 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 04:12:39,633 INFO L276 IsEmpty]: Start isEmpty. Operand 131189 states and 397459 transitions. [2021-06-05 04:12:39,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:12:39,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:39,675 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:39,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9992,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:39,876 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:39,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:39,876 INFO L82 PathProgramCache]: Analyzing trace with hash -606029772, now seen corresponding path program 283 times [2021-06-05 04:12:39,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:39,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347243270] [2021-06-05 04:12:39,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:12:39,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:39,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347243270] [2021-06-05 04:12:39,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347243270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:39,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650321624] [2021-06-05 04:12:39,942 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 04:12:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:39,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:12:39,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:12:40,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650321624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:40,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:40,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 04:12:40,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273090434] [2021-06-05 04:12:40,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:12:40,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:40,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:12:40,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:12:40,012 INFO L87 Difference]: Start difference. First operand 131189 states and 397459 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 04:12:41,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:41,061 INFO L93 Difference]: Finished difference Result 131509 states and 397970 transitions. [2021-06-05 04:12:41,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:12:41,061 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 24 [2021-06-05 04:12:41,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:41,335 INFO L225 Difference]: With dead ends: 131509 [2021-06-05 04:12:41,335 INFO L226 Difference]: Without dead ends: 131502 [2021-06-05 04:12:41,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:12:41,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131502 states. [2021-06-05 04:12:43,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131502 to 131146. [2021-06-05 04:12:43,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131146 states, 131145 states have (on average 3.029646574402379) internal successors, (397323), 131145 states have internal predecessors, (397323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:44,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131146 states to 131146 states and 397323 transitions. [2021-06-05 04:12:44,164 INFO L78 Accepts]: Start accepts. Automaton has 131146 states and 397323 transitions. Word has length 24 [2021-06-05 04:12:44,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:44,164 INFO L482 AbstractCegarLoop]: Abstraction has 131146 states and 397323 transitions. [2021-06-05 04:12:44,164 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 04:12:44,164 INFO L276 IsEmpty]: Start isEmpty. Operand 131146 states and 397323 transitions. [2021-06-05 04:12:44,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:12:44,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:44,208 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:44,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9993 [2021-06-05 04:12:44,408 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:44,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:44,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1104583536, now seen corresponding path program 284 times [2021-06-05 04:12:44,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:44,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850405758] [2021-06-05 04:12:44,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:12:44,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:44,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850405758] [2021-06-05 04:12:44,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850405758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:44,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422182807] [2021-06-05 04:12:44,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:12:44,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:12:44,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:44,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:12:44,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:12:44,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422182807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:44,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:44,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2021-06-05 04:12:44,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203508758] [2021-06-05 04:12:44,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:12:44,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:44,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:12:44,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:12:44,560 INFO L87 Difference]: Start difference. First operand 131146 states and 397323 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 04:12:45,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:45,767 INFO L93 Difference]: Finished difference Result 131510 states and 397931 transitions. [2021-06-05 04:12:45,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:12:45,767 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 24 [2021-06-05 04:12:45,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:46,049 INFO L225 Difference]: With dead ends: 131510 [2021-06-05 04:12:46,049 INFO L226 Difference]: Without dead ends: 131508 [2021-06-05 04:12:46,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:12:46,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131508 states. [2021-06-05 04:12:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131508 to 131130. [2021-06-05 04:12:48,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131130 states, 131129 states have (on average 3.029581557092634) internal successors, (397266), 131129 states have internal predecessors, (397266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:48,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131130 states to 131130 states and 397266 transitions. [2021-06-05 04:12:48,736 INFO L78 Accepts]: Start accepts. Automaton has 131130 states and 397266 transitions. Word has length 24 [2021-06-05 04:12:48,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:48,736 INFO L482 AbstractCegarLoop]: Abstraction has 131130 states and 397266 transitions. [2021-06-05 04:12:48,736 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 04:12:48,736 INFO L276 IsEmpty]: Start isEmpty. Operand 131130 states and 397266 transitions. [2021-06-05 04:12:48,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:12:48,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:48,785 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:48,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9994 [2021-06-05 04:12:48,986 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:48,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:48,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1700978764, now seen corresponding path program 285 times [2021-06-05 04:12:48,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:48,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252058566] [2021-06-05 04:12:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:49,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:49,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252058566] [2021-06-05 04:12:49,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252058566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:49,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437025869] [2021-06-05 04:12:49,060 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 04:12:49,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 04:12:49,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:49,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:12:49,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:49,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437025869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:49,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:49,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:12:49,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930616236] [2021-06-05 04:12:49,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:12:49,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:49,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:12:49,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:12:49,128 INFO L87 Difference]: Start difference. First operand 131130 states and 397266 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 04:12:50,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:50,264 INFO L93 Difference]: Finished difference Result 131365 states and 397609 transitions. [2021-06-05 04:12:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:12:50,281 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 24 [2021-06-05 04:12:50,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:50,568 INFO L225 Difference]: With dead ends: 131365 [2021-06-05 04:12:50,568 INFO L226 Difference]: Without dead ends: 131362 [2021-06-05 04:12:50,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=279, Invalid=591, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:12:50,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131362 states. [2021-06-05 04:12:52,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131362 to 131116. [2021-06-05 04:12:52,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.029531327460626) internal successors, (397217), 131115 states have internal predecessors, (397217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:53,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397217 transitions. [2021-06-05 04:12:53,140 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397217 transitions. Word has length 24 [2021-06-05 04:12:53,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:53,140 INFO L482 AbstractCegarLoop]: Abstraction has 131116 states and 397217 transitions. [2021-06-05 04:12:53,140 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 04:12:53,140 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397217 transitions. [2021-06-05 04:12:53,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:12:53,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:53,186 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:53,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9995 [2021-06-05 04:12:53,387 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:53,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:53,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1520903152, now seen corresponding path program 286 times [2021-06-05 04:12:53,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:53,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736811897] [2021-06-05 04:12:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:53,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:53,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736811897] [2021-06-05 04:12:53,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736811897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:53,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896097459] [2021-06-05 04:12:53,481 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 04:12:53,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:12:53,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:53,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:12:53,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:12:53,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896097459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:53,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:53,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 04:12:53,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075062423] [2021-06-05 04:12:53,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:12:53,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:53,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:12:53,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:12:53,547 INFO L87 Difference]: Start difference. First operand 131116 states and 397217 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 04:12:54,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:54,237 INFO L93 Difference]: Finished difference Result 131356 states and 397566 transitions. [2021-06-05 04:12:54,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:12:54,238 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 24 [2021-06-05 04:12:54,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:54,533 INFO L225 Difference]: With dead ends: 131356 [2021-06-05 04:12:54,533 INFO L226 Difference]: Without dead ends: 131351 [2021-06-05 04:12:54,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=316, Invalid=676, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:12:55,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131351 states. [2021-06-05 04:12:57,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131351 to 131116. [2021-06-05 04:12:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.0294016702894404) internal successors, (397200), 131115 states have internal predecessors, (397200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:12:57,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397200 transitions. [2021-06-05 04:12:57,830 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397200 transitions. Word has length 24 [2021-06-05 04:12:57,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:57,830 INFO L482 AbstractCegarLoop]: Abstraction has 131116 states and 397200 transitions. [2021-06-05 04:12:57,830 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 04:12:57,830 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397200 transitions. [2021-06-05 04:12:57,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:12:57,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:57,878 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:58,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9996 [2021-06-05 04:12:58,079 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:58,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:58,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1679972556, now seen corresponding path program 287 times [2021-06-05 04:12:58,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:58,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277863767] [2021-06-05 04:12:58,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:58,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:58,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277863767] [2021-06-05 04:12:58,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277863767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:58,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175937566] [2021-06-05 04:12:58,159 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 04:12:58,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 04:12:58,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:58,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:12:58,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:12:58,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175937566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:58,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:58,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 04:12:58,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225838244] [2021-06-05 04:12:58,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:12:58,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:58,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:12:58,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:12:58,227 INFO L87 Difference]: Start difference. First operand 131116 states and 397200 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 04:12:58,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:58,812 INFO L93 Difference]: Finished difference Result 131372 states and 397726 transitions. [2021-06-05 04:12:58,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:12:58,812 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 24 [2021-06-05 04:12:58,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:59,070 INFO L225 Difference]: With dead ends: 131372 [2021-06-05 04:12:59,070 INFO L226 Difference]: Without dead ends: 131369 [2021-06-05 04:12:59,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:12:59,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131369 states. [2021-06-05 04:13:01,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131369 to 131116. [2021-06-05 04:13:01,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.0293787896121724) internal successors, (397197), 131115 states have internal predecessors, (397197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:02,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397197 transitions. [2021-06-05 04:13:02,417 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397197 transitions. Word has length 24 [2021-06-05 04:13:02,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:02,417 INFO L482 AbstractCegarLoop]: Abstraction has 131116 states and 397197 transitions. [2021-06-05 04:13:02,417 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 04:13:02,417 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397197 transitions. [2021-06-05 04:13:02,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:13:02,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:02,468 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:02,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9997,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:02,669 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:02,669 INFO L82 PathProgramCache]: Analyzing trace with hash 542222794, now seen corresponding path program 288 times [2021-06-05 04:13:02,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:02,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133790818] [2021-06-05 04:13:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:13:02,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:02,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133790818] [2021-06-05 04:13:02,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133790818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:02,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895301140] [2021-06-05 04:13:02,749 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 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 04:13:02,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 04:13:02,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:02,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:13:02,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:13:02,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895301140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:02,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:02,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:13:02,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103244377] [2021-06-05 04:13:02,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:13:02,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:02,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:13:02,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:13:02,834 INFO L87 Difference]: Start difference. First operand 131116 states and 397197 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 04:13:03,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:03,347 INFO L93 Difference]: Finished difference Result 131414 states and 397691 transitions. [2021-06-05 04:13:03,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:13:03,348 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 24 [2021-06-05 04:13:03,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:03,617 INFO L225 Difference]: With dead ends: 131414 [2021-06-05 04:13:03,617 INFO L226 Difference]: Without dead ends: 131412 [2021-06-05 04:13:03,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:13:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131412 states. [2021-06-05 04:13:06,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131412 to 131150. [2021-06-05 04:13:06,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131150 states, 131149 states have (on average 3.029096676299476) internal successors, (397263), 131149 states have internal predecessors, (397263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:06,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131150 states to 131150 states and 397263 transitions. [2021-06-05 04:13:06,505 INFO L78 Accepts]: Start accepts. Automaton has 131150 states and 397263 transitions. Word has length 24 [2021-06-05 04:13:06,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:06,505 INFO L482 AbstractCegarLoop]: Abstraction has 131150 states and 397263 transitions. [2021-06-05 04:13:06,505 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 04:13:06,505 INFO L276 IsEmpty]: Start isEmpty. Operand 131150 states and 397263 transitions. [2021-06-05 04:13:06,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:13:06,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:06,550 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:06,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9998 [2021-06-05 04:13:06,750 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:06,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:06,751 INFO L82 PathProgramCache]: Analyzing trace with hash -2007289812, now seen corresponding path program 289 times [2021-06-05 04:13:06,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:06,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065908668] [2021-06-05 04:13:06,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:06,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:06,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065908668] [2021-06-05 04:13:06,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065908668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:06,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453510348] [2021-06-05 04:13:06,809 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 04:13:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:06,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:13:06,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:13:06,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453510348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:06,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:06,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 04:13:06,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716825932] [2021-06-05 04:13:06,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:13:06,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:06,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:13:06,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:13:06,877 INFO L87 Difference]: Start difference. First operand 131150 states and 397263 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 04:13:07,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:07,887 INFO L93 Difference]: Finished difference Result 131457 states and 397741 transitions. [2021-06-05 04:13:07,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:13:07,887 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 24 [2021-06-05 04:13:07,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:08,165 INFO L225 Difference]: With dead ends: 131457 [2021-06-05 04:13:08,165 INFO L226 Difference]: Without dead ends: 131452 [2021-06-05 04:13:08,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:13:08,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131452 states. [2021-06-05 04:13:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131452 to 131114. [2021-06-05 04:13:10,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131114 states, 131113 states have (on average 3.028967379283519) internal successors, (397137), 131113 states have internal predecessors, (397137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:10,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131114 states to 131114 states and 397137 transitions. [2021-06-05 04:13:10,964 INFO L78 Accepts]: Start accepts. Automaton has 131114 states and 397137 transitions. Word has length 24 [2021-06-05 04:13:10,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:10,964 INFO L482 AbstractCegarLoop]: Abstraction has 131114 states and 397137 transitions. [2021-06-05 04:13:10,964 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 04:13:10,964 INFO L276 IsEmpty]: Start isEmpty. Operand 131114 states and 397137 transitions. [2021-06-05 04:13:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:13:11,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:11,008 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:11,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9999,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:11,208 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:11,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:11,209 INFO L82 PathProgramCache]: Analyzing trace with hash -296676504, now seen corresponding path program 290 times [2021-06-05 04:13:11,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:11,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976820907] [2021-06-05 04:13:11,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:11,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:11,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976820907] [2021-06-05 04:13:11,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976820907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:11,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954449143] [2021-06-05 04:13:11,272 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 04:13:11,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:13:11,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:11,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:13:11,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:13:11,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954449143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:11,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:11,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2021-06-05 04:13:11,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989493209] [2021-06-05 04:13:11,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:13:11,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:11,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:13:11,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:13:11,339 INFO L87 Difference]: Start difference. First operand 131114 states and 397137 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 04:13:12,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:12,491 INFO L93 Difference]: Finished difference Result 131477 states and 397730 transitions. [2021-06-05 04:13:12,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:13:12,492 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 24 [2021-06-05 04:13:12,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:12,764 INFO L225 Difference]: With dead ends: 131477 [2021-06-05 04:13:12,764 INFO L226 Difference]: Without dead ends: 131475 [2021-06-05 04:13:12,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:13:12,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131475 states. [2021-06-05 04:13:14,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131475 to 131109. [2021-06-05 04:13:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131109 states, 131108 states have (on average 3.0287701742075237) internal successors, (397096), 131108 states have internal predecessors, (397096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:15,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131109 states to 131109 states and 397096 transitions. [2021-06-05 04:13:15,406 INFO L78 Accepts]: Start accepts. Automaton has 131109 states and 397096 transitions. Word has length 24 [2021-06-05 04:13:15,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:15,406 INFO L482 AbstractCegarLoop]: Abstraction has 131109 states and 397096 transitions. [2021-06-05 04:13:15,407 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 04:13:15,407 INFO L276 IsEmpty]: Start isEmpty. Operand 131109 states and 397096 transitions. [2021-06-05 04:13:15,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:13:15,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:15,452 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:15,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10000 [2021-06-05 04:13:15,652 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:15,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1192728492, now seen corresponding path program 291 times [2021-06-05 04:13:15,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:15,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739652554] [2021-06-05 04:13:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:15,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:15,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739652554] [2021-06-05 04:13:15,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739652554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:15,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915960866] [2021-06-05 04:13:15,724 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 04:13:15,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 04:13:15,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:15,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:13:15,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:15,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915960866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:15,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:15,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:13:15,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733578157] [2021-06-05 04:13:15,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:13:15,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:15,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:13:15,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:13:15,792 INFO L87 Difference]: Start difference. First operand 131109 states and 397096 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 04:13:16,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:16,409 INFO L93 Difference]: Finished difference Result 131340 states and 397434 transitions. [2021-06-05 04:13:16,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:13:16,409 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 24 [2021-06-05 04:13:16,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:17,279 INFO L225 Difference]: With dead ends: 131340 [2021-06-05 04:13:17,279 INFO L226 Difference]: Without dead ends: 131337 [2021-06-05 04:13:17,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:13:17,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131337 states. [2021-06-05 04:13:19,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131337 to 131102. [2021-06-05 04:13:19,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131102 states, 131101 states have (on average 3.0285733899817697) internal successors, (397049), 131101 states have internal predecessors, (397049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131102 states to 131102 states and 397049 transitions. [2021-06-05 04:13:19,853 INFO L78 Accepts]: Start accepts. Automaton has 131102 states and 397049 transitions. Word has length 24 [2021-06-05 04:13:19,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:19,853 INFO L482 AbstractCegarLoop]: Abstraction has 131102 states and 397049 transitions. [2021-06-05 04:13:19,853 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 04:13:19,853 INFO L276 IsEmpty]: Start isEmpty. Operand 131102 states and 397049 transitions. [2021-06-05 04:13:19,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:13:19,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:19,895 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:20,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10001,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:20,095 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:20,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:20,096 INFO L82 PathProgramCache]: Analyzing trace with hash 119643112, now seen corresponding path program 292 times [2021-06-05 04:13:20,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:20,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191086419] [2021-06-05 04:13:20,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:20,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:20,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191086419] [2021-06-05 04:13:20,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191086419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:20,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969089479] [2021-06-05 04:13:20,181 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 04:13:20,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:13:20,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:20,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:13:20,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:13:20,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969089479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:20,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:20,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-06-05 04:13:20,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504190131] [2021-06-05 04:13:20,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:13:20,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:20,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:13:20,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:13:20,242 INFO L87 Difference]: Start difference. First operand 131102 states and 397049 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 04:13:20,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:20,901 INFO L93 Difference]: Finished difference Result 131338 states and 397393 transitions. [2021-06-05 04:13:20,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:13:20,902 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 24 [2021-06-05 04:13:20,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:21,173 INFO L225 Difference]: With dead ends: 131338 [2021-06-05 04:13:21,173 INFO L226 Difference]: Without dead ends: 131333 [2021-06-05 04:13:21,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 167.5ms TimeCoverageRelationStatistics Valid=299, Invalid=631, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:13:21,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131333 states. [2021-06-05 04:13:23,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131333 to 131102. [2021-06-05 04:13:23,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131102 states, 131101 states have (on average 3.028352186482178) internal successors, (397020), 131101 states have internal predecessors, (397020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:24,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131102 states to 131102 states and 397020 transitions. [2021-06-05 04:13:24,530 INFO L78 Accepts]: Start accepts. Automaton has 131102 states and 397020 transitions. Word has length 24 [2021-06-05 04:13:24,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:24,531 INFO L482 AbstractCegarLoop]: Abstraction has 131102 states and 397020 transitions. [2021-06-05 04:13:24,531 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 04:13:24,531 INFO L276 IsEmpty]: Start isEmpty. Operand 131102 states and 397020 transitions. [2021-06-05 04:13:24,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:13:24,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:24,571 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:24,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10002 [2021-06-05 04:13:24,772 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:24,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:24,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1213734700, now seen corresponding path program 293 times [2021-06-05 04:13:24,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:24,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944587277] [2021-06-05 04:13:24,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:24,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:24,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944587277] [2021-06-05 04:13:24,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944587277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:24,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373608397] [2021-06-05 04:13:24,854 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 04:13:24,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 04:13:24,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:24,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:13:24,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:24,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373608397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:24,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:24,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:13:24,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904753386] [2021-06-05 04:13:24,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:13:24,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:24,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:13:24,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:13:24,918 INFO L87 Difference]: Start difference. First operand 131102 states and 397020 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 04:13:25,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:25,511 INFO L93 Difference]: Finished difference Result 131408 states and 397643 transitions. [2021-06-05 04:13:25,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:13:25,511 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 24 [2021-06-05 04:13:25,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:25,799 INFO L225 Difference]: With dead ends: 131408 [2021-06-05 04:13:25,799 INFO L226 Difference]: Without dead ends: 131405 [2021-06-05 04:13:25,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:13:25,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131405 states. [2021-06-05 04:13:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131405 to 131104. [2021-06-05 04:13:28,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.028328871192879) internal successors, (397023), 131103 states have internal predecessors, (397023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:28,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397023 transitions. [2021-06-05 04:13:28,678 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397023 transitions. Word has length 24 [2021-06-05 04:13:28,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:28,678 INFO L482 AbstractCegarLoop]: Abstraction has 131104 states and 397023 transitions. [2021-06-05 04:13:28,678 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 04:13:28,678 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397023 transitions. [2021-06-05 04:13:29,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:13:29,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:29,198 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:29,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10003,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:29,417 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:29,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:29,417 INFO L82 PathProgramCache]: Analyzing trace with hash 770835560, now seen corresponding path program 294 times [2021-06-05 04:13:29,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:29,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893609028] [2021-06-05 04:13:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:29,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:29,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893609028] [2021-06-05 04:13:29,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893609028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:29,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454804916] [2021-06-05 04:13:29,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:13:29,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 04:13:29,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:29,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:13:29,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:29,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454804916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:29,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:29,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:13:29,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816556874] [2021-06-05 04:13:29,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:13:29,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:29,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:13:29,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:13:29,570 INFO L87 Difference]: Start difference. First operand 131104 states and 397023 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 04:13:30,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:30,573 INFO L93 Difference]: Finished difference Result 131400 states and 397630 transitions. [2021-06-05 04:13:30,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:13:30,573 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 24 [2021-06-05 04:13:30,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:30,905 INFO L225 Difference]: With dead ends: 131400 [2021-06-05 04:13:30,906 INFO L226 Difference]: Without dead ends: 131396 [2021-06-05 04:13:30,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:13:31,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131396 states. [2021-06-05 04:13:33,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131396 to 131104. [2021-06-05 04:13:33,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.0283059884213177) internal successors, (397020), 131103 states have internal predecessors, (397020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:33,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397020 transitions. [2021-06-05 04:13:33,508 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397020 transitions. Word has length 24 [2021-06-05 04:13:33,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:33,508 INFO L482 AbstractCegarLoop]: Abstraction has 131104 states and 397020 transitions. [2021-06-05 04:13:33,508 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 04:13:33,508 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397020 transitions. [2021-06-05 04:13:33,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:13:33,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:33,552 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:33,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10004 [2021-06-05 04:13:33,753 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:33,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:33,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1666696844, now seen corresponding path program 295 times [2021-06-05 04:13:33,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:33,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527427329] [2021-06-05 04:13:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:33,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:33,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527427329] [2021-06-05 04:13:33,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527427329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:33,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497172084] [2021-06-05 04:13:33,826 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 04:13:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:33,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:13:33,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:13:33,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497172084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:33,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:33,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-06-05 04:13:33,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700965019] [2021-06-05 04:13:33,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:13:33,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:33,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:13:33,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:13:33,888 INFO L87 Difference]: Start difference. First operand 131104 states and 397020 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 04:13:34,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:34,485 INFO L93 Difference]: Finished difference Result 131360 states and 397542 transitions. [2021-06-05 04:13:34,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:13:34,486 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 24 [2021-06-05 04:13:34,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:35,349 INFO L225 Difference]: With dead ends: 131360 [2021-06-05 04:13:35,349 INFO L226 Difference]: Without dead ends: 131357 [2021-06-05 04:13:35,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:13:35,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131357 states. [2021-06-05 04:13:37,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131357 to 131089. [2021-06-05 04:13:37,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131089 states, 131088 states have (on average 3.0283626266324912) internal successors, (396982), 131088 states have internal predecessors, (396982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131089 states to 131089 states and 396982 transitions. [2021-06-05 04:13:38,112 INFO L78 Accepts]: Start accepts. Automaton has 131089 states and 396982 transitions. Word has length 24 [2021-06-05 04:13:38,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:38,112 INFO L482 AbstractCegarLoop]: Abstraction has 131089 states and 396982 transitions. [2021-06-05 04:13:38,112 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 04:13:38,112 INFO L276 IsEmpty]: Start isEmpty. Operand 131089 states and 396982 transitions. [2021-06-05 04:13:38,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:13:38,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:38,159 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:38,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10005 [2021-06-05 04:13:38,360 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:38,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:38,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1360813274, now seen corresponding path program 296 times [2021-06-05 04:13:38,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:38,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597701691] [2021-06-05 04:13:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:38,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:38,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597701691] [2021-06-05 04:13:38,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597701691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:38,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795034666] [2021-06-05 04:13:38,440 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 04:13:38,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:13:38,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:38,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:13:38,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:13:38,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795034666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:38,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:38,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-06-05 04:13:38,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034222409] [2021-06-05 04:13:38,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:13:38,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:38,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:13:38,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:13:38,500 INFO L87 Difference]: Start difference. First operand 131089 states and 396982 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 04:13:39,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:39,139 INFO L93 Difference]: Finished difference Result 131311 states and 397318 transitions. [2021-06-05 04:13:39,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:13:39,139 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 24 [2021-06-05 04:13:39,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:39,406 INFO L225 Difference]: With dead ends: 131311 [2021-06-05 04:13:39,407 INFO L226 Difference]: Without dead ends: 131308 [2021-06-05 04:13:39,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:13:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131308 states. [2021-06-05 04:13:41,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131308 to 131087. [2021-06-05 04:13:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131087 states, 131086 states have (on average 3.028195230611965) internal successors, (396954), 131086 states have internal predecessors, (396954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:42,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131087 states to 131087 states and 396954 transitions. [2021-06-05 04:13:42,658 INFO L78 Accepts]: Start accepts. Automaton has 131087 states and 396954 transitions. Word has length 24 [2021-06-05 04:13:42,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:42,658 INFO L482 AbstractCegarLoop]: Abstraction has 131087 states and 396954 transitions. [2021-06-05 04:13:42,658 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 04:13:42,658 INFO L276 IsEmpty]: Start isEmpty. Operand 131087 states and 396954 transitions. [2021-06-05 04:13:42,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:13:42,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:42,699 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:42,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10006 [2021-06-05 04:13:42,900 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:42,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:42,900 INFO L82 PathProgramCache]: Analyzing trace with hash 917914134, now seen corresponding path program 297 times [2021-06-05 04:13:42,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:42,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176154739] [2021-06-05 04:13:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:42,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:42,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176154739] [2021-06-05 04:13:42,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176154739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:42,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206316269] [2021-06-05 04:13:42,984 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 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 04:13:43,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 04:13:43,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:43,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:13:43,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:43,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206316269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:43,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:43,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:13:43,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410246192] [2021-06-05 04:13:43,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:13:43,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:43,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:13:43,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:13:43,051 INFO L87 Difference]: Start difference. First operand 131087 states and 396954 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 04:13:43,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:43,695 INFO L93 Difference]: Finished difference Result 131552 states and 397896 transitions. [2021-06-05 04:13:43,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:13:43,695 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 24 [2021-06-05 04:13:43,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:43,967 INFO L225 Difference]: With dead ends: 131552 [2021-06-05 04:13:43,967 INFO L226 Difference]: Without dead ends: 131544 [2021-06-05 04:13:43,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:13:44,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131544 states. [2021-06-05 04:13:46,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131544 to 131094. [2021-06-05 04:13:46,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131094 states, 131093 states have (on average 3.0281555842035806) internal successors, (396970), 131093 states have internal predecessors, (396970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131094 states to 131094 states and 396970 transitions. [2021-06-05 04:13:46,849 INFO L78 Accepts]: Start accepts. Automaton has 131094 states and 396970 transitions. Word has length 24 [2021-06-05 04:13:46,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:46,849 INFO L482 AbstractCegarLoop]: Abstraction has 131094 states and 396970 transitions. [2021-06-05 04:13:46,849 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 04:13:46,849 INFO L276 IsEmpty]: Start isEmpty. Operand 131094 states and 396970 transitions. [2021-06-05 04:13:47,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:13:47,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:47,357 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:47,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10007,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:47,573 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:47,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:47,573 INFO L82 PathProgramCache]: Analyzing trace with hash 52834514, now seen corresponding path program 298 times [2021-06-05 04:13:47,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:47,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616162685] [2021-06-05 04:13:47,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:13:47,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:47,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616162685] [2021-06-05 04:13:47,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616162685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:47,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558592151] [2021-06-05 04:13:47,629 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 04:13:47,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:13:47,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:47,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:13:47,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:13:47,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558592151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:47,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:47,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:13:47,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114007530] [2021-06-05 04:13:47,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:13:47,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:47,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:13:47,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:13:47,697 INFO L87 Difference]: Start difference. First operand 131094 states and 396970 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 04:13:48,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:48,189 INFO L93 Difference]: Finished difference Result 131378 states and 397470 transitions. [2021-06-05 04:13:48,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:13:48,189 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 24 [2021-06-05 04:13:48,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:48,472 INFO L225 Difference]: With dead ends: 131378 [2021-06-05 04:13:48,472 INFO L226 Difference]: Without dead ends: 131378 [2021-06-05 04:13:48,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:13:48,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131378 states. [2021-06-05 04:13:50,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131378 to 131115. [2021-06-05 04:13:50,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131115 states, 131114 states have (on average 3.0280900590325976) internal successors, (397025), 131114 states have internal predecessors, (397025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:51,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131115 states to 131115 states and 397025 transitions. [2021-06-05 04:13:51,279 INFO L78 Accepts]: Start accepts. Automaton has 131115 states and 397025 transitions. Word has length 24 [2021-06-05 04:13:51,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:51,279 INFO L482 AbstractCegarLoop]: Abstraction has 131115 states and 397025 transitions. [2021-06-05 04:13:51,279 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 04:13:51,279 INFO L276 IsEmpty]: Start isEmpty. Operand 131115 states and 397025 transitions. [2021-06-05 04:13:51,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:13:51,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:51,322 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:51,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10008 [2021-06-05 04:13:51,522 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:51,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:51,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1798289204, now seen corresponding path program 299 times [2021-06-05 04:13:51,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:51,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247721092] [2021-06-05 04:13:51,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:13:51,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:51,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247721092] [2021-06-05 04:13:51,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247721092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:51,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689883538] [2021-06-05 04:13:51,578 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 04:13:51,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:13:51,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:51,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:13:51,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:13:51,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689883538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:51,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:51,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 04:13:51,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066100967] [2021-06-05 04:13:51,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:13:51,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:51,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:13:51,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:13:51,647 INFO L87 Difference]: Start difference. First operand 131115 states and 397025 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 04:13:52,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:52,731 INFO L93 Difference]: Finished difference Result 131464 states and 397561 transitions. [2021-06-05 04:13:52,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:13:52,732 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 24 [2021-06-05 04:13:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:53,005 INFO L225 Difference]: With dead ends: 131464 [2021-06-05 04:13:53,006 INFO L226 Difference]: Without dead ends: 131461 [2021-06-05 04:13:53,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:13:53,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131461 states. [2021-06-05 04:13:55,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131461 to 131127. [2021-06-05 04:13:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131127 states, 131126 states have (on average 3.0277290544972013) internal successors, (397014), 131126 states have internal predecessors, (397014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:13:55,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131127 states to 131127 states and 397014 transitions. [2021-06-05 04:13:55,723 INFO L78 Accepts]: Start accepts. Automaton has 131127 states and 397014 transitions. Word has length 24 [2021-06-05 04:13:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:55,723 INFO L482 AbstractCegarLoop]: Abstraction has 131127 states and 397014 transitions. [2021-06-05 04:13:55,723 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 04:13:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 131127 states and 397014 transitions. [2021-06-05 04:13:55,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:13:55,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:55,766 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:55,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10009,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:55,967 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:55,967 INFO L82 PathProgramCache]: Analyzing trace with hash 703340212, now seen corresponding path program 300 times [2021-06-05 04:13:55,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:55,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139533493] [2021-06-05 04:13:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:56,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:56,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139533493] [2021-06-05 04:13:56,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139533493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:56,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114946591] [2021-06-05 04:13:56,034 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 04:13:56,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:13:56,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:56,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:13:56,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:56,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114946591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:56,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:56,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:13:56,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917556575] [2021-06-05 04:13:56,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:13:56,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:56,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:13:56,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:13:56,099 INFO L87 Difference]: Start difference. First operand 131127 states and 397014 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 04:13:57,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:57,250 INFO L93 Difference]: Finished difference Result 131365 states and 397357 transitions. [2021-06-05 04:13:57,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:13:57,250 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 24 [2021-06-05 04:13:57,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:57,544 INFO L225 Difference]: With dead ends: 131365 [2021-06-05 04:13:57,544 INFO L226 Difference]: Without dead ends: 131358 [2021-06-05 04:13:57,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=248, Invalid=508, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:13:57,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131358 states. [2021-06-05 04:13:59,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131358 to 131081. [2021-06-05 04:13:59,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131081 states, 131080 states have (on average 3.0275785779676534) internal successors, (396855), 131080 states have internal predecessors, (396855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:00,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131081 states to 131081 states and 396855 transitions. [2021-06-05 04:14:00,145 INFO L78 Accepts]: Start accepts. Automaton has 131081 states and 396855 transitions. Word has length 24 [2021-06-05 04:14:00,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:00,145 INFO L482 AbstractCegarLoop]: Abstraction has 131081 states and 396855 transitions. [2021-06-05 04:14:00,145 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 04:14:00,146 INFO L276 IsEmpty]: Start isEmpty. Operand 131081 states and 396855 transitions. [2021-06-05 04:14:00,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:14:00,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:00,189 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:00,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10010,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:00,389 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:00,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:00,389 INFO L82 PathProgramCache]: Analyzing trace with hash -369745168, now seen corresponding path program 301 times [2021-06-05 04:14:00,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:00,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012354255] [2021-06-05 04:14:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 27 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:00,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:00,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012354255] [2021-06-05 04:14:00,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012354255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:00,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170638118] [2021-06-05 04:14:00,460 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 04:14:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:00,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:14:00,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:14:00,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170638118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:00,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:00,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 04:14:00,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928156562] [2021-06-05 04:14:00,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:14:00,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:00,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:14:00,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:14:00,525 INFO L87 Difference]: Start difference. First operand 131081 states and 396855 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 04:14:01,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:01,139 INFO L93 Difference]: Finished difference Result 131320 states and 397204 transitions. [2021-06-05 04:14:01,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:14:01,139 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 24 [2021-06-05 04:14:01,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:01,410 INFO L225 Difference]: With dead ends: 131320 [2021-06-05 04:14:01,410 INFO L226 Difference]: Without dead ends: 131315 [2021-06-05 04:14:01,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:14:02,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131315 states. [2021-06-05 04:14:04,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131315 to 131074. [2021-06-05 04:14:04,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131074 states, 131073 states have (on average 3.0273053947037147) internal successors, (396798), 131073 states have internal predecessors, (396798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131074 states to 131074 states and 396798 transitions. [2021-06-05 04:14:04,708 INFO L78 Accepts]: Start accepts. Automaton has 131074 states and 396798 transitions. Word has length 24 [2021-06-05 04:14:04,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:04,708 INFO L482 AbstractCegarLoop]: Abstraction has 131074 states and 396798 transitions. [2021-06-05 04:14:04,708 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 04:14:04,708 INFO L276 IsEmpty]: Start isEmpty. Operand 131074 states and 396798 transitions. [2021-06-05 04:14:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:14:04,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:04,751 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:04,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10011 [2021-06-05 04:14:04,952 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:04,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:04,952 INFO L82 PathProgramCache]: Analyzing trace with hash 724346420, now seen corresponding path program 302 times [2021-06-05 04:14:04,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:04,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306899505] [2021-06-05 04:14:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:04,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:05,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:05,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306899505] [2021-06-05 04:14:05,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306899505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:05,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984589403] [2021-06-05 04:14:05,041 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 04:14:05,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:14:05,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:05,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:14:05,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:14:05,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984589403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:05,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:05,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-06-05 04:14:05,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24759422] [2021-06-05 04:14:05,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:14:05,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:05,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:14:05,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:14:05,107 INFO L87 Difference]: Start difference. First operand 131074 states and 396798 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 04:14:05,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:05,735 INFO L93 Difference]: Finished difference Result 131318 states and 397153 transitions. [2021-06-05 04:14:05,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:14:05,736 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 24 [2021-06-05 04:14:05,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:05,992 INFO L225 Difference]: With dead ends: 131318 [2021-06-05 04:14:05,992 INFO L226 Difference]: Without dead ends: 131312 [2021-06-05 04:14:05,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=317, Invalid=675, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:14:06,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131312 states. [2021-06-05 04:14:08,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131312 to 131075. [2021-06-05 04:14:08,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131075 states, 131074 states have (on average 3.026984756702321) internal successors, (396759), 131074 states have internal predecessors, (396759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:09,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131075 states to 131075 states and 396759 transitions. [2021-06-05 04:14:09,422 INFO L78 Accepts]: Start accepts. Automaton has 131075 states and 396759 transitions. Word has length 24 [2021-06-05 04:14:09,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:09,422 INFO L482 AbstractCegarLoop]: Abstraction has 131075 states and 396759 transitions. [2021-06-05 04:14:09,422 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 04:14:09,422 INFO L276 IsEmpty]: Start isEmpty. Operand 131075 states and 396759 transitions. [2021-06-05 04:14:09,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:14:09,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:09,464 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:09,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10012 [2021-06-05 04:14:09,665 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:09,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:09,665 INFO L82 PathProgramCache]: Analyzing trace with hash 281447280, now seen corresponding path program 303 times [2021-06-05 04:14:09,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:09,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964927064] [2021-06-05 04:14:09,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:09,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:09,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964927064] [2021-06-05 04:14:09,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964927064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:09,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276345168] [2021-06-05 04:14:09,753 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 04:14:09,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 04:14:09,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:09,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:14:09,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:09,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276345168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:09,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:09,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 04:14:09,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965367274] [2021-06-05 04:14:09,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:14:09,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:09,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:14:09,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:14:09,829 INFO L87 Difference]: Start difference. First operand 131075 states and 396759 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 04:14:10,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:10,442 INFO L93 Difference]: Finished difference Result 131674 states and 397979 transitions. [2021-06-05 04:14:10,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:14:10,442 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 24 [2021-06-05 04:14:10,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:10,704 INFO L225 Difference]: With dead ends: 131674 [2021-06-05 04:14:10,704 INFO L226 Difference]: Without dead ends: 131666 [2021-06-05 04:14:10,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:14:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131666 states. [2021-06-05 04:14:13,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131666 to 131083. [2021-06-05 04:14:13,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131083 states, 131082 states have (on average 3.026937336934133) internal successors, (396777), 131082 states have internal predecessors, (396777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:13,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131083 states to 131083 states and 396777 transitions. [2021-06-05 04:14:13,488 INFO L78 Accepts]: Start accepts. Automaton has 131083 states and 396777 transitions. Word has length 24 [2021-06-05 04:14:13,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:13,488 INFO L482 AbstractCegarLoop]: Abstraction has 131083 states and 396777 transitions. [2021-06-05 04:14:13,488 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 04:14:13,488 INFO L276 IsEmpty]: Start isEmpty. Operand 131083 states and 396777 transitions. [2021-06-05 04:14:13,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:14:13,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:13,531 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:13,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10013 [2021-06-05 04:14:13,732 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:13,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:13,732 INFO L82 PathProgramCache]: Analyzing trace with hash -563524172, now seen corresponding path program 304 times [2021-06-05 04:14:13,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:13,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894896831] [2021-06-05 04:14:13,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:14,241 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 04:14:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:14,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:14,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894896831] [2021-06-05 04:14:14,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894896831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:14,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354075072] [2021-06-05 04:14:14,242 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 04:14:14,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:14:14,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:14,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:14:14,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:14:14,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354075072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:14,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:14,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-06-05 04:14:14,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490421878] [2021-06-05 04:14:14,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:14:14,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:14,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:14:14,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:14:14,395 INFO L87 Difference]: Start difference. First operand 131083 states and 396777 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 04:14:15,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:15,053 INFO L93 Difference]: Finished difference Result 131661 states and 397955 transitions. [2021-06-05 04:14:15,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:14:15,053 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 24 [2021-06-05 04:14:15,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:15,308 INFO L225 Difference]: With dead ends: 131661 [2021-06-05 04:14:15,308 INFO L226 Difference]: Without dead ends: 131646 [2021-06-05 04:14:15,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 615.1ms TimeCoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:14:15,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131646 states. [2021-06-05 04:14:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131646 to 131092. [2021-06-05 04:14:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131092 states, 131091 states have (on average 3.0268515763858694) internal successors, (396793), 131091 states have internal predecessors, (396793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131092 states to 131092 states and 396793 transitions. [2021-06-05 04:14:18,104 INFO L78 Accepts]: Start accepts. Automaton has 131092 states and 396793 transitions. Word has length 24 [2021-06-05 04:14:18,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:18,104 INFO L482 AbstractCegarLoop]: Abstraction has 131092 states and 396793 transitions. [2021-06-05 04:14:18,104 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 04:14:18,105 INFO L276 IsEmpty]: Start isEmpty. Operand 131092 states and 396793 transitions. [2021-06-05 04:14:18,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:14:18,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:18,149 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:18,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10014 [2021-06-05 04:14:18,349 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:18,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:18,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1182382632, now seen corresponding path program 305 times [2021-06-05 04:14:18,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:18,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137889206] [2021-06-05 04:14:18,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:18,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:18,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137889206] [2021-06-05 04:14:18,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137889206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:18,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356601094] [2021-06-05 04:14:18,429 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 04:14:18,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 04:14:18,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:18,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:14:18,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:18,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356601094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:18,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:18,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:14:18,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092935734] [2021-06-05 04:14:18,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:14:18,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:18,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:14:18,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:14:18,494 INFO L87 Difference]: Start difference. First operand 131092 states and 396793 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 04:14:19,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:19,577 INFO L93 Difference]: Finished difference Result 131394 states and 397427 transitions. [2021-06-05 04:14:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:14:19,577 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 24 [2021-06-05 04:14:19,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:19,835 INFO L225 Difference]: With dead ends: 131394 [2021-06-05 04:14:19,835 INFO L226 Difference]: Without dead ends: 131390 [2021-06-05 04:14:19,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=252, Invalid=560, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:14:19,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131390 states. [2021-06-05 04:14:22,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131390 to 131082. [2021-06-05 04:14:22,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131082 states, 131081 states have (on average 3.0267544495388345) internal successors, (396750), 131081 states have internal predecessors, (396750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131082 states to 131082 states and 396750 transitions. [2021-06-05 04:14:22,640 INFO L78 Accepts]: Start accepts. Automaton has 131082 states and 396750 transitions. Word has length 24 [2021-06-05 04:14:22,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:22,640 INFO L482 AbstractCegarLoop]: Abstraction has 131082 states and 396750 transitions. [2021-06-05 04:14:22,640 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 04:14:22,640 INFO L276 IsEmpty]: Start isEmpty. Operand 131082 states and 396750 transitions. [2021-06-05 04:14:22,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:14:22,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:22,682 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:22,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10015 [2021-06-05 04:14:22,882 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:22,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:22,882 INFO L82 PathProgramCache]: Analyzing trace with hash 545915778, now seen corresponding path program 306 times [2021-06-05 04:14:22,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:22,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013795858] [2021-06-05 04:14:22,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:22,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:22,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013795858] [2021-06-05 04:14:22,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013795858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:22,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129144729] [2021-06-05 04:14:22,967 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 04:14:22,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:14:22,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:22,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:14:22,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:23,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129144729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:23,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:23,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 04:14:23,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851274960] [2021-06-05 04:14:23,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:14:23,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:23,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:14:23,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:14:23,042 INFO L87 Difference]: Start difference. First operand 131082 states and 396750 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 04:14:24,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:24,264 INFO L93 Difference]: Finished difference Result 131351 states and 397199 transitions. [2021-06-05 04:14:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:14:24,264 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 24 [2021-06-05 04:14:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:24,551 INFO L225 Difference]: With dead ends: 131351 [2021-06-05 04:14:24,551 INFO L226 Difference]: Without dead ends: 131347 [2021-06-05 04:14:24,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:14:24,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131347 states. [2021-06-05 04:14:26,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131347 to 131079. [2021-06-05 04:14:26,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131079 states, 131078 states have (on average 3.0264804162407115) internal successors, (396705), 131078 states have internal predecessors, (396705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:27,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131079 states to 131079 states and 396705 transitions. [2021-06-05 04:14:27,220 INFO L78 Accepts]: Start accepts. Automaton has 131079 states and 396705 transitions. Word has length 24 [2021-06-05 04:14:27,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:27,220 INFO L482 AbstractCegarLoop]: Abstraction has 131079 states and 396705 transitions. [2021-06-05 04:14:27,220 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 04:14:27,221 INFO L276 IsEmpty]: Start isEmpty. Operand 131079 states and 396705 transitions. [2021-06-05 04:14:27,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:14:27,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:27,265 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:27,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10016,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:27,465 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:27,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:27,465 INFO L82 PathProgramCache]: Analyzing trace with hash -299055674, now seen corresponding path program 307 times [2021-06-05 04:14:27,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:27,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316452477] [2021-06-05 04:14:27,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:27,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:27,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316452477] [2021-06-05 04:14:27,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316452477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:27,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992659587] [2021-06-05 04:14:27,553 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 04:14:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:27,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:14:27,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:14:27,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992659587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:27,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:27,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-06-05 04:14:27,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617390765] [2021-06-05 04:14:27,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:14:27,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:27,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:14:27,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:14:27,621 INFO L87 Difference]: Start difference. First operand 131079 states and 396705 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 04:14:28,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:28,258 INFO L93 Difference]: Finished difference Result 131763 states and 398113 transitions. [2021-06-05 04:14:28,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:14:28,259 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 24 [2021-06-05 04:14:28,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:29,124 INFO L225 Difference]: With dead ends: 131763 [2021-06-05 04:14:29,124 INFO L226 Difference]: Without dead ends: 131748 [2021-06-05 04:14:29,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=327, Invalid=729, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:14:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131748 states. [2021-06-05 04:14:31,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131748 to 131119. [2021-06-05 04:14:31,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131119 states, 131118 states have (on average 3.0261825226132184) internal successors, (396787), 131118 states have internal predecessors, (396787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:31,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131119 states to 131119 states and 396787 transitions. [2021-06-05 04:14:31,750 INFO L78 Accepts]: Start accepts. Automaton has 131119 states and 396787 transitions. Word has length 24 [2021-06-05 04:14:31,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:31,751 INFO L482 AbstractCegarLoop]: Abstraction has 131119 states and 396787 transitions. [2021-06-05 04:14:31,751 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 04:14:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand 131119 states and 396787 transitions. [2021-06-05 04:14:31,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:14:31,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:31,805 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:32,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10017 [2021-06-05 04:14:32,028 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:32,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:32,029 INFO L82 PathProgramCache]: Analyzing trace with hash 2061667018, now seen corresponding path program 308 times [2021-06-05 04:14:32,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:32,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250735165] [2021-06-05 04:14:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:14:32,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:32,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250735165] [2021-06-05 04:14:32,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250735165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:32,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944598184] [2021-06-05 04:14:32,093 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 04:14:32,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:14:32,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:32,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:14:32,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:14:32,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944598184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:32,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:32,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 04:14:32,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541311598] [2021-06-05 04:14:32,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:14:32,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:32,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:14:32,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:14:32,178 INFO L87 Difference]: Start difference. First operand 131119 states and 396787 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 04:14:33,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:33,301 INFO L93 Difference]: Finished difference Result 131485 states and 397395 transitions. [2021-06-05 04:14:33,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:14:33,301 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 24 [2021-06-05 04:14:33,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:33,591 INFO L225 Difference]: With dead ends: 131485 [2021-06-05 04:14:33,591 INFO L226 Difference]: Without dead ends: 131485 [2021-06-05 04:14:33,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:14:33,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131485 states. [2021-06-05 04:14:35,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131485 to 131093. [2021-06-05 04:14:35,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.025852073353065) internal successors, (396665), 131092 states have internal predecessors, (396665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 396665 transitions. [2021-06-05 04:14:36,263 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 396665 transitions. Word has length 24 [2021-06-05 04:14:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:36,263 INFO L482 AbstractCegarLoop]: Abstraction has 131093 states and 396665 transitions. [2021-06-05 04:14:36,263 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 04:14:36,263 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 396665 transitions. [2021-06-05 04:14:36,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:14:36,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:36,311 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:36,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10018 [2021-06-05 04:14:36,512 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:36,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:36,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1582794580, now seen corresponding path program 309 times [2021-06-05 04:14:36,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:36,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527420103] [2021-06-05 04:14:36,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:36,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:36,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527420103] [2021-06-05 04:14:36,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527420103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:36,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487436090] [2021-06-05 04:14:36,589 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 04:14:36,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 04:14:36,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:36,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:14:36,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:36,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487436090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:36,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:36,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:14:36,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889328535] [2021-06-05 04:14:36,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:14:36,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:36,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:14:36,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:14:36,667 INFO L87 Difference]: Start difference. First operand 131093 states and 396665 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 04:14:37,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:37,305 INFO L93 Difference]: Finished difference Result 131333 states and 397012 transitions. [2021-06-05 04:14:37,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:14:37,305 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 24 [2021-06-05 04:14:37,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:38,128 INFO L225 Difference]: With dead ends: 131333 [2021-06-05 04:14:38,129 INFO L226 Difference]: Without dead ends: 131328 [2021-06-05 04:14:38,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 143.7ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:14:38,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131328 states. [2021-06-05 04:14:40,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131328 to 131072. [2021-06-05 04:14:40,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.0252458591145257) internal successors, (396522), 131071 states have internal predecessors, (396522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:40,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396522 transitions. [2021-06-05 04:14:40,718 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396522 transitions. Word has length 24 [2021-06-05 04:14:40,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:40,718 INFO L482 AbstractCegarLoop]: Abstraction has 131072 states and 396522 transitions. [2021-06-05 04:14:40,718 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 04:14:40,718 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396522 transitions. [2021-06-05 04:14:40,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:14:40,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:40,757 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:40,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10019,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:40,957 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:40,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:40,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1639087336, now seen corresponding path program 310 times [2021-06-05 04:14:40,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:40,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326889504] [2021-06-05 04:14:40,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:41,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:41,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326889504] [2021-06-05 04:14:41,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326889504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:41,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096090078] [2021-06-05 04:14:41,027 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 04:14:41,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:14:41,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:41,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:14:41,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:14:41,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096090078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:41,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:41,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 04:14:41,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701228532] [2021-06-05 04:14:41,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:14:41,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:41,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:14:41,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:14:41,096 INFO L87 Difference]: Start difference. First operand 131072 states and 396522 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 04:14:41,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:41,679 INFO L93 Difference]: Finished difference Result 131314 states and 396874 transitions. [2021-06-05 04:14:41,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:14:41,679 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 24 [2021-06-05 04:14:41,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:41,938 INFO L225 Difference]: With dead ends: 131314 [2021-06-05 04:14:41,938 INFO L226 Difference]: Without dead ends: 131309 [2021-06-05 04:14:41,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:14:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131309 states. [2021-06-05 04:14:44,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131309 to 131072. [2021-06-05 04:14:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.024261659711149) internal successors, (396393), 131071 states have internal predecessors, (396393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:45,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396393 transitions. [2021-06-05 04:14:45,268 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396393 transitions. Word has length 24 [2021-06-05 04:14:45,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:45,268 INFO L482 AbstractCegarLoop]: Abstraction has 131072 states and 396393 transitions. [2021-06-05 04:14:45,268 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 04:14:45,268 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396393 transitions. [2021-06-05 04:14:45,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:14:45,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:45,304 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:45,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10020 [2021-06-05 04:14:45,505 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:45,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:45,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1561788372, now seen corresponding path program 311 times [2021-06-05 04:14:45,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:45,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508577742] [2021-06-05 04:14:45,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:45,590 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:45,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:45,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508577742] [2021-06-05 04:14:45,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508577742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:45,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944659506] [2021-06-05 04:14:45,591 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 04:14:45,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:14:45,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:45,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:14:45,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:45,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944659506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:45,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:45,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:14:45,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009218999] [2021-06-05 04:14:45,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:14:45,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:45,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:14:45,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:14:45,662 INFO L87 Difference]: Start difference. First operand 131072 states and 396393 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 04:14:46,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:46,207 INFO L93 Difference]: Finished difference Result 132743 states and 399958 transitions. [2021-06-05 04:14:46,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:14:46,208 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 24 [2021-06-05 04:14:46,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:46,478 INFO L225 Difference]: With dead ends: 132743 [2021-06-05 04:14:46,478 INFO L226 Difference]: Without dead ends: 132740 [2021-06-05 04:14:46,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:14:46,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132740 states. [2021-06-05 04:14:48,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132740 to 131072. [2021-06-05 04:14:48,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.0241853651837554) internal successors, (396383), 131071 states have internal predecessors, (396383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396383 transitions. [2021-06-05 04:14:49,319 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396383 transitions. Word has length 24 [2021-06-05 04:14:49,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:49,319 INFO L482 AbstractCegarLoop]: Abstraction has 131072 states and 396383 transitions. [2021-06-05 04:14:49,319 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 04:14:49,319 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396383 transitions. [2021-06-05 04:14:49,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:14:49,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:49,368 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:49,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10021,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:49,571 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:49,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:49,571 INFO L82 PathProgramCache]: Analyzing trace with hash -2004687512, now seen corresponding path program 312 times [2021-06-05 04:14:49,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:49,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047265940] [2021-06-05 04:14:49,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:49,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:49,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047265940] [2021-06-05 04:14:49,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047265940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:49,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701730599] [2021-06-05 04:14:49,654 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 04:14:50,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:14:50,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:50,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:14:50,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:50,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701730599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:50,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:50,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 04:14:50,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491547759] [2021-06-05 04:14:50,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:14:50,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:50,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:14:50,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:14:50,178 INFO L87 Difference]: Start difference. First operand 131072 states and 396383 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 04:14:50,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:50,773 INFO L93 Difference]: Finished difference Result 132748 states and 399952 transitions. [2021-06-05 04:14:50,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:14:50,774 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 24 [2021-06-05 04:14:50,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:51,037 INFO L225 Difference]: With dead ends: 132748 [2021-06-05 04:14:51,037 INFO L226 Difference]: Without dead ends: 132740 [2021-06-05 04:14:51,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 160.2ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:14:51,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132740 states. [2021-06-05 04:14:53,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132740 to 131124. [2021-06-05 04:14:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131124 states, 131123 states have (on average 3.0238097053911215) internal successors, (396491), 131123 states have internal predecessors, (396491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:53,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131124 states to 131124 states and 396491 transitions. [2021-06-05 04:14:53,781 INFO L78 Accepts]: Start accepts. Automaton has 131124 states and 396491 transitions. Word has length 24 [2021-06-05 04:14:53,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:53,781 INFO L482 AbstractCegarLoop]: Abstraction has 131124 states and 396491 transitions. [2021-06-05 04:14:53,781 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 04:14:53,781 INFO L276 IsEmpty]: Start isEmpty. Operand 131124 states and 396491 transitions. [2021-06-05 04:14:53,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:14:53,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:53,824 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:54,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10022 [2021-06-05 04:14:54,024 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:54,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:54,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1445308332, now seen corresponding path program 313 times [2021-06-05 04:14:54,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:54,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051800820] [2021-06-05 04:14:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:54,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:54,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051800820] [2021-06-05 04:14:54,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051800820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:54,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323505895] [2021-06-05 04:14:54,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:14:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:54,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:14:54,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:14:54,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323505895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:54,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:54,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-06-05 04:14:54,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463852886] [2021-06-05 04:14:54,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:14:54,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:54,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:14:54,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:14:54,178 INFO L87 Difference]: Start difference. First operand 131124 states and 396491 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 04:14:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:55,276 INFO L93 Difference]: Finished difference Result 131783 states and 397838 transitions. [2021-06-05 04:14:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:14:55,277 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 24 [2021-06-05 04:14:55,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:55,559 INFO L225 Difference]: With dead ends: 131783 [2021-06-05 04:14:55,559 INFO L226 Difference]: Without dead ends: 131778 [2021-06-05 04:14:55,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:14:55,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131778 states. [2021-06-05 04:14:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131778 to 131124. [2021-06-05 04:14:57,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131124 states, 131123 states have (on average 3.023794452536931) internal successors, (396489), 131123 states have internal predecessors, (396489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131124 states to 131124 states and 396489 transitions. [2021-06-05 04:14:58,259 INFO L78 Accepts]: Start accepts. Automaton has 131124 states and 396489 transitions. Word has length 24 [2021-06-05 04:14:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:58,259 INFO L482 AbstractCegarLoop]: Abstraction has 131124 states and 396489 transitions. [2021-06-05 04:14:58,259 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 04:14:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 131124 states and 396489 transitions. [2021-06-05 04:14:58,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:14:58,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:58,301 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:58,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10023 [2021-06-05 04:14:58,501 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:58,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:58,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1020997096, now seen corresponding path program 314 times [2021-06-05 04:14:58,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:58,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021130477] [2021-06-05 04:14:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:58,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:58,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021130477] [2021-06-05 04:14:58,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021130477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:58,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262708240] [2021-06-05 04:14:58,598 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 04:14:58,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:14:58,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:58,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:14:58,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:14:58,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262708240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:58,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:58,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-06-05 04:14:58,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232403411] [2021-06-05 04:14:58,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:14:58,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:58,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:14:58,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:14:58,664 INFO L87 Difference]: Start difference. First operand 131124 states and 396489 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 04:14:59,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:59,851 INFO L93 Difference]: Finished difference Result 131712 states and 397702 transitions. [2021-06-05 04:14:59,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:14:59,865 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 24 [2021-06-05 04:14:59,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:00,124 INFO L225 Difference]: With dead ends: 131712 [2021-06-05 04:15:00,124 INFO L226 Difference]: Without dead ends: 131706 [2021-06-05 04:15:00,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:15:00,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131706 states. [2021-06-05 04:15:02,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131706 to 131124. [2021-06-05 04:15:02,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131124 states, 131123 states have (on average 3.023779199682741) internal successors, (396487), 131123 states have internal predecessors, (396487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131124 states to 131124 states and 396487 transitions. [2021-06-05 04:15:02,793 INFO L78 Accepts]: Start accepts. Automaton has 131124 states and 396487 transitions. Word has length 24 [2021-06-05 04:15:02,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:02,793 INFO L482 AbstractCegarLoop]: Abstraction has 131124 states and 396487 transitions. [2021-06-05 04:15:02,794 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 04:15:02,794 INFO L276 IsEmpty]: Start isEmpty. Operand 131124 states and 396487 transitions. [2021-06-05 04:15:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:15:02,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:02,851 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:03,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10024 [2021-06-05 04:15:03,052 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:03,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:03,052 INFO L82 PathProgramCache]: Analyzing trace with hash -690466828, now seen corresponding path program 315 times [2021-06-05 04:15:03,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:03,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496521948] [2021-06-05 04:15:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:03,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:03,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496521948] [2021-06-05 04:15:03,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496521948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:03,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969689716] [2021-06-05 04:15:03,153 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 04:15:03,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:15:03,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:03,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:15:03,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:03,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969689716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:03,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:03,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 04:15:03,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339382429] [2021-06-05 04:15:03,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:15:03,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:03,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:15:03,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:15:03,257 INFO L87 Difference]: Start difference. First operand 131124 states and 396487 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 04:15:03,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:03,928 INFO L93 Difference]: Finished difference Result 131475 states and 397232 transitions. [2021-06-05 04:15:03,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:15:03,929 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 24 [2021-06-05 04:15:03,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:04,745 INFO L225 Difference]: With dead ends: 131475 [2021-06-05 04:15:04,745 INFO L226 Difference]: Without dead ends: 131470 [2021-06-05 04:15:04,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 197.1ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:15:04,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131470 states. [2021-06-05 04:15:07,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131470 to 131115. [2021-06-05 04:15:07,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131115 states, 131114 states have (on average 3.0236435468371035) internal successors, (396442), 131114 states have internal predecessors, (396442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:07,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131115 states to 131115 states and 396442 transitions. [2021-06-05 04:15:07,692 INFO L78 Accepts]: Start accepts. Automaton has 131115 states and 396442 transitions. Word has length 24 [2021-06-05 04:15:07,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:07,692 INFO L482 AbstractCegarLoop]: Abstraction has 131115 states and 396442 transitions. [2021-06-05 04:15:07,692 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 04:15:07,692 INFO L276 IsEmpty]: Start isEmpty. Operand 131115 states and 396442 transitions. [2021-06-05 04:15:07,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:15:07,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:07,740 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:07,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10025 [2021-06-05 04:15:07,940 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:07,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:07,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1053897178, now seen corresponding path program 316 times [2021-06-05 04:15:07,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:07,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044594376] [2021-06-05 04:15:07,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:08,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:08,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044594376] [2021-06-05 04:15:08,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044594376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:08,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783173199] [2021-06-05 04:15:08,035 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 04:15:08,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:15:08,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:08,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:15:08,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:08,097 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:15:08,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783173199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:08,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:08,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-06-05 04:15:08,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228121591] [2021-06-05 04:15:08,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:15:08,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:08,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:15:08,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:15:08,098 INFO L87 Difference]: Start difference. First operand 131115 states and 396442 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 04:15:08,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:08,709 INFO L93 Difference]: Finished difference Result 132301 states and 398883 transitions. [2021-06-05 04:15:08,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:15:08,710 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 24 [2021-06-05 04:15:08,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:08,988 INFO L225 Difference]: With dead ends: 132301 [2021-06-05 04:15:08,988 INFO L226 Difference]: Without dead ends: 132286 [2021-06-05 04:15:08,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:15:09,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132286 states. [2021-06-05 04:15:11,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132286 to 131160. [2021-06-05 04:15:11,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131160 states, 131159 states have (on average 3.023116980153859) internal successors, (396509), 131159 states have internal predecessors, (396509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131160 states to 131160 states and 396509 transitions. [2021-06-05 04:15:12,601 INFO L78 Accepts]: Start accepts. Automaton has 131160 states and 396509 transitions. Word has length 24 [2021-06-05 04:15:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:12,601 INFO L482 AbstractCegarLoop]: Abstraction has 131160 states and 396509 transitions. [2021-06-05 04:15:12,601 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 04:15:12,601 INFO L276 IsEmpty]: Start isEmpty. Operand 131160 states and 396509 transitions. [2021-06-05 04:15:12,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:15:12,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:12,654 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:12,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10026,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:12,854 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:12,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:12,855 INFO L82 PathProgramCache]: Analyzing trace with hash 629585942, now seen corresponding path program 317 times [2021-06-05 04:15:12,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:12,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464562723] [2021-06-05 04:15:12,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:12,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:12,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464562723] [2021-06-05 04:15:12,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464562723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:12,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199049857] [2021-06-05 04:15:12,951 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 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 04:15:12,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:15:12,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:12,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:15:12,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:15:13,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199049857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:13,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:13,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-06-05 04:15:13,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903162816] [2021-06-05 04:15:13,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:15:13,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:13,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:15:13,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:15:13,027 INFO L87 Difference]: Start difference. First operand 131160 states and 396509 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 04:15:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:13,760 INFO L93 Difference]: Finished difference Result 131749 states and 397717 transitions. [2021-06-05 04:15:13,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:15:13,764 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 24 [2021-06-05 04:15:13,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:14,092 INFO L225 Difference]: With dead ends: 131749 [2021-06-05 04:15:14,093 INFO L226 Difference]: Without dead ends: 131743 [2021-06-05 04:15:14,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:15:14,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131743 states. [2021-06-05 04:15:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131743 to 131160. [2021-06-05 04:15:17,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131160 states, 131159 states have (on average 3.023109355820035) internal successors, (396508), 131159 states have internal predecessors, (396508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:17,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131160 states to 131160 states and 396508 transitions. [2021-06-05 04:15:17,427 INFO L78 Accepts]: Start accepts. Automaton has 131160 states and 396508 transitions. Word has length 24 [2021-06-05 04:15:17,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:17,427 INFO L482 AbstractCegarLoop]: Abstraction has 131160 states and 396508 transitions. [2021-06-05 04:15:17,427 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 04:15:17,428 INFO L276 IsEmpty]: Start isEmpty. Operand 131160 states and 396508 transitions. [2021-06-05 04:15:17,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:15:17,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:17,477 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:17,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10027 [2021-06-05 04:15:17,678 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:17,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:17,678 INFO L82 PathProgramCache]: Analyzing trace with hash -89034798, now seen corresponding path program 318 times [2021-06-05 04:15:17,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:17,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595542667] [2021-06-05 04:15:17,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:15:18,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:18,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595542667] [2021-06-05 04:15:18,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595542667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:18,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647299265] [2021-06-05 04:15:18,166 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 04:15:18,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:15:18,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:18,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:15:18,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:15:18,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647299265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:18,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:18,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 04:15:18,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325175871] [2021-06-05 04:15:18,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:15:18,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:18,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:15:18,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:15:18,355 INFO L87 Difference]: Start difference. First operand 131160 states and 396508 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 04:15:18,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:18,897 INFO L93 Difference]: Finished difference Result 131436 states and 396919 transitions. [2021-06-05 04:15:18,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:15:18,901 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 24 [2021-06-05 04:15:18,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:19,207 INFO L225 Difference]: With dead ends: 131436 [2021-06-05 04:15:19,207 INFO L226 Difference]: Without dead ends: 131434 [2021-06-05 04:15:19,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 498.4ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:15:19,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131434 states. [2021-06-05 04:15:21,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131434 to 131152. [2021-06-05 04:15:21,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131152 states, 131151 states have (on average 3.0228438974922036) internal successors, (396449), 131151 states have internal predecessors, (396449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131152 states to 131152 states and 396449 transitions. [2021-06-05 04:15:22,217 INFO L78 Accepts]: Start accepts. Automaton has 131152 states and 396449 transitions. Word has length 24 [2021-06-05 04:15:22,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:22,217 INFO L482 AbstractCegarLoop]: Abstraction has 131152 states and 396449 transitions. [2021-06-05 04:15:22,217 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 04:15:22,217 INFO L276 IsEmpty]: Start isEmpty. Operand 131152 states and 396449 transitions. [2021-06-05 04:15:22,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:15:22,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:22,261 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:22,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10028 [2021-06-05 04:15:22,468 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:22,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:22,469 INFO L82 PathProgramCache]: Analyzing trace with hash 561470900, now seen corresponding path program 319 times [2021-06-05 04:15:22,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:22,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326287347] [2021-06-05 04:15:22,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:15:22,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:22,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326287347] [2021-06-05 04:15:22,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326287347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:22,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497162129] [2021-06-05 04:15:22,543 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 04:15:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:22,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:15:22,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:15:22,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497162129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:22,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:22,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-06-05 04:15:22,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892545105] [2021-06-05 04:15:22,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:15:22,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:22,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:15:22,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:15:22,604 INFO L87 Difference]: Start difference. First operand 131152 states and 396449 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 04:15:23,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:23,745 INFO L93 Difference]: Finished difference Result 131396 states and 396804 transitions. [2021-06-05 04:15:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:15:23,746 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 24 [2021-06-05 04:15:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:24,032 INFO L225 Difference]: With dead ends: 131396 [2021-06-05 04:15:24,032 INFO L226 Difference]: Without dead ends: 131393 [2021-06-05 04:15:24,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=214, Invalid=436, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:15:24,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131393 states. [2021-06-05 04:15:26,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131393 to 131141. [2021-06-05 04:15:26,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.0221976513649533) internal successors, (396331), 131140 states have internal predecessors, (396331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396331 transitions. [2021-06-05 04:15:26,918 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396331 transitions. Word has length 24 [2021-06-05 04:15:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:26,918 INFO L482 AbstractCegarLoop]: Abstraction has 131141 states and 396331 transitions. [2021-06-05 04:15:26,918 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 04:15:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396331 transitions. [2021-06-05 04:15:26,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:15:26,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:26,970 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:27,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10029,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:27,171 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:27,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:27,171 INFO L82 PathProgramCache]: Analyzing trace with hash -511614480, now seen corresponding path program 320 times [2021-06-05 04:15:27,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:27,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593116623] [2021-06-05 04:15:27,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:27,249 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:27,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:27,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593116623] [2021-06-05 04:15:27,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593116623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:27,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21046823] [2021-06-05 04:15:27,250 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 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 04:15:27,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:15:27,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:27,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:15:27,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:15:27,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21046823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:27,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:27,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-06-05 04:15:27,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500874476] [2021-06-05 04:15:27,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:15:27,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:27,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:15:27,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:15:27,344 INFO L87 Difference]: Start difference. First operand 131141 states and 396331 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 04:15:28,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:28,557 INFO L93 Difference]: Finished difference Result 131390 states and 396692 transitions. [2021-06-05 04:15:28,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:15:28,573 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 24 [2021-06-05 04:15:28,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:28,862 INFO L225 Difference]: With dead ends: 131390 [2021-06-05 04:15:28,862 INFO L226 Difference]: Without dead ends: 131385 [2021-06-05 04:15:28,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:15:28,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131385 states. [2021-06-05 04:15:31,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131385 to 131141. [2021-06-05 04:15:31,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.0206191856031723) internal successors, (396124), 131140 states have internal predecessors, (396124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:31,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396124 transitions. [2021-06-05 04:15:31,602 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396124 transitions. Word has length 24 [2021-06-05 04:15:31,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:31,602 INFO L482 AbstractCegarLoop]: Abstraction has 131141 states and 396124 transitions. [2021-06-05 04:15:31,602 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 04:15:31,602 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396124 transitions. [2021-06-05 04:15:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:15:31,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:31,667 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:31,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10030,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:31,868 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:31,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:31,868 INFO L82 PathProgramCache]: Analyzing trace with hash 582477108, now seen corresponding path program 321 times [2021-06-05 04:15:31,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:31,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832537971] [2021-06-05 04:15:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:31,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:31,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832537971] [2021-06-05 04:15:31,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832537971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:31,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276948734] [2021-06-05 04:15:31,946 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 04:15:31,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:15:31,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:31,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:15:31,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:32,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276948734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:32,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:32,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:15:32,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025341825] [2021-06-05 04:15:32,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:15:32,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:32,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:15:32,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:15:32,017 INFO L87 Difference]: Start difference. First operand 131141 states and 396124 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 04:15:33,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:33,244 INFO L93 Difference]: Finished difference Result 133913 states and 402552 transitions. [2021-06-05 04:15:33,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:15:33,245 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 24 [2021-06-05 04:15:33,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:33,558 INFO L225 Difference]: With dead ends: 133913 [2021-06-05 04:15:33,559 INFO L226 Difference]: Without dead ends: 133910 [2021-06-05 04:15:33,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:15:33,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133910 states. [2021-06-05 04:15:35,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133910 to 131141. [2021-06-05 04:15:35,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.020283666310813) internal successors, (396080), 131140 states have internal predecessors, (396080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:36,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396080 transitions. [2021-06-05 04:15:36,276 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396080 transitions. Word has length 24 [2021-06-05 04:15:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:36,276 INFO L482 AbstractCegarLoop]: Abstraction has 131141 states and 396080 transitions. [2021-06-05 04:15:36,276 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 04:15:36,276 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396080 transitions. [2021-06-05 04:15:36,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:15:36,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:36,319 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:36,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10031,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:36,520 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:36,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:36,520 INFO L82 PathProgramCache]: Analyzing trace with hash 139577968, now seen corresponding path program 322 times [2021-06-05 04:15:36,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:36,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495381526] [2021-06-05 04:15:36,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:15:36,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:36,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495381526] [2021-06-05 04:15:36,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495381526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:36,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957941108] [2021-06-05 04:15:36,602 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 04:15:36,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:15:36,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:36,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:15:36,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:15:36,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957941108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:36,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:36,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-06-05 04:15:36,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304454479] [2021-06-05 04:15:36,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:15:36,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:36,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:15:36,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:15:36,664 INFO L87 Difference]: Start difference. First operand 131141 states and 396080 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 04:15:37,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:37,818 INFO L93 Difference]: Finished difference Result 132975 states and 400018 transitions. [2021-06-05 04:15:37,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:15:37,825 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 24 [2021-06-05 04:15:37,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:38,166 INFO L225 Difference]: With dead ends: 132975 [2021-06-05 04:15:38,166 INFO L226 Difference]: Without dead ends: 132971 [2021-06-05 04:15:38,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:15:38,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132971 states. [2021-06-05 04:15:40,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132971 to 131141. [2021-06-05 04:15:40,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.020253164556962) internal successors, (396076), 131140 states have internal predecessors, (396076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396076 transitions. [2021-06-05 04:15:40,844 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396076 transitions. Word has length 24 [2021-06-05 04:15:40,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:40,844 INFO L482 AbstractCegarLoop]: Abstraction has 131141 states and 396076 transitions. [2021-06-05 04:15:40,844 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 04:15:40,845 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396076 transitions. [2021-06-05 04:15:40,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:15:40,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:40,889 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:41,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10032,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:41,090 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:41,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:41,090 INFO L82 PathProgramCache]: Analyzing trace with hash -705393484, now seen corresponding path program 323 times [2021-06-05 04:15:41,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:41,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718409515] [2021-06-05 04:15:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:41,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:41,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718409515] [2021-06-05 04:15:41,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718409515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:41,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569372926] [2021-06-05 04:15:41,189 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 04:15:41,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:15:41,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:41,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:15:41,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:15:41,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569372926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:41,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:41,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-06-05 04:15:41,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180357072] [2021-06-05 04:15:41,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:15:41,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:41,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:15:41,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:15:41,252 INFO L87 Difference]: Start difference. First operand 131141 states and 396076 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 04:15:41,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:41,881 INFO L93 Difference]: Finished difference Result 132986 states and 400023 transitions. [2021-06-05 04:15:41,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:15:41,883 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 24 [2021-06-05 04:15:41,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:42,170 INFO L225 Difference]: With dead ends: 132986 [2021-06-05 04:15:42,170 INFO L226 Difference]: Without dead ends: 132971 [2021-06-05 04:15:42,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 175.9ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:15:42,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132971 states. [2021-06-05 04:15:44,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132971 to 131201. [2021-06-05 04:15:44,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131201 states, 131200 states have (on average 3.0197713414634144) internal successors, (396194), 131200 states have internal predecessors, (396194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:45,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131201 states to 131201 states and 396194 transitions. [2021-06-05 04:15:45,549 INFO L78 Accepts]: Start accepts. Automaton has 131201 states and 396194 transitions. Word has length 24 [2021-06-05 04:15:45,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:45,549 INFO L482 AbstractCegarLoop]: Abstraction has 131201 states and 396194 transitions. [2021-06-05 04:15:45,549 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 04:15:45,549 INFO L276 IsEmpty]: Start isEmpty. Operand 131201 states and 396194 transitions. [2021-06-05 04:15:45,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:15:45,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:45,593 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:45,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10033 [2021-06-05 04:15:45,794 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:45,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:45,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1129704720, now seen corresponding path program 324 times [2021-06-05 04:15:45,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:45,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025399029] [2021-06-05 04:15:45,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:45,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:45,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025399029] [2021-06-05 04:15:45,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025399029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:45,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75869830] [2021-06-05 04:15:45,889 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 04:15:45,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:15:45,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:45,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:15:45,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:45,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75869830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:45,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:45,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 04:15:45,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372137342] [2021-06-05 04:15:45,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:15:45,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:45,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:15:45,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:15:45,955 INFO L87 Difference]: Start difference. First operand 131201 states and 396194 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 04:15:46,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:46,591 INFO L93 Difference]: Finished difference Result 131929 states and 397683 transitions. [2021-06-05 04:15:46,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:15:46,591 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 24 [2021-06-05 04:15:46,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:46,866 INFO L225 Difference]: With dead ends: 131929 [2021-06-05 04:15:46,866 INFO L226 Difference]: Without dead ends: 131923 [2021-06-05 04:15:46,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:15:46,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131923 states. [2021-06-05 04:15:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131923 to 131201. [2021-06-05 04:15:49,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131201 states, 131200 states have (on average 3.019763719512195) internal successors, (396193), 131200 states have internal predecessors, (396193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:50,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131201 states to 131201 states and 396193 transitions. [2021-06-05 04:15:50,177 INFO L78 Accepts]: Start accepts. Automaton has 131201 states and 396193 transitions. Word has length 24 [2021-06-05 04:15:50,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:50,177 INFO L482 AbstractCegarLoop]: Abstraction has 131201 states and 396193 transitions. [2021-06-05 04:15:50,177 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 04:15:50,177 INFO L276 IsEmpty]: Start isEmpty. Operand 131201 states and 396193 transitions. [2021-06-05 04:15:50,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:15:50,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:50,232 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:50,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10034 [2021-06-05 04:15:50,445 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:50,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:50,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1398451148, now seen corresponding path program 325 times [2021-06-05 04:15:50,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:50,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329142874] [2021-06-05 04:15:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:50,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:50,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329142874] [2021-06-05 04:15:50,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329142874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:50,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044228941] [2021-06-05 04:15:50,549 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 04:15:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:50,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:15:50,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:15:50,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044228941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:50,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:50,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-06-05 04:15:50,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703329483] [2021-06-05 04:15:50,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:15:50,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:50,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:15:50,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:15:50,611 INFO L87 Difference]: Start difference. First operand 131201 states and 396193 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 04:15:51,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:51,175 INFO L93 Difference]: Finished difference Result 131858 states and 397549 transitions. [2021-06-05 04:15:51,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:15:51,175 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 24 [2021-06-05 04:15:51,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:51,449 INFO L225 Difference]: With dead ends: 131858 [2021-06-05 04:15:51,450 INFO L226 Difference]: Without dead ends: 131851 [2021-06-05 04:15:51,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 182.3ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:15:51,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131851 states. [2021-06-05 04:15:53,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131851 to 131201. [2021-06-05 04:15:53,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131201 states, 131200 states have (on average 3.0197560975609754) internal successors, (396192), 131200 states have internal predecessors, (396192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:54,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131201 states to 131201 states and 396192 transitions. [2021-06-05 04:15:54,293 INFO L78 Accepts]: Start accepts. Automaton has 131201 states and 396192 transitions. Word has length 24 [2021-06-05 04:15:54,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:54,293 INFO L482 AbstractCegarLoop]: Abstraction has 131201 states and 396192 transitions. [2021-06-05 04:15:54,293 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 04:15:54,293 INFO L276 IsEmpty]: Start isEmpty. Operand 131201 states and 396192 transitions. [2021-06-05 04:15:54,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:15:54,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:54,341 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:54,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10035 [2021-06-05 04:15:54,541 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:54,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:54,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1057585994, now seen corresponding path program 326 times [2021-06-05 04:15:54,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:54,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902993546] [2021-06-05 04:15:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:15:54,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:54,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902993546] [2021-06-05 04:15:54,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902993546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:54,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531674892] [2021-06-05 04:15:54,621 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 04:15:54,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:15:54,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:54,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:15:54,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 61 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:15:54,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531674892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:54,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:54,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:15:54,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290925042] [2021-06-05 04:15:54,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:15:54,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:54,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:15:54,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:15:54,692 INFO L87 Difference]: Start difference. First operand 131201 states and 396192 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 04:15:55,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:55,749 INFO L93 Difference]: Finished difference Result 131376 states and 396488 transitions. [2021-06-05 04:15:55,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:15:55,749 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 24 [2021-06-05 04:15:55,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:56,034 INFO L225 Difference]: With dead ends: 131376 [2021-06-05 04:15:56,035 INFO L226 Difference]: Without dead ends: 131372 [2021-06-05 04:15:56,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 565.2ms TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:15:56,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131372 states. [2021-06-05 04:15:58,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131372 to 131153. [2021-06-05 04:15:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131153 states, 131152 states have (on average 3.0198014517506406) internal successors, (396053), 131152 states have internal predecessors, (396053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:58,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131153 states to 131153 states and 396053 transitions. [2021-06-05 04:15:58,907 INFO L78 Accepts]: Start accepts. Automaton has 131153 states and 396053 transitions. Word has length 24 [2021-06-05 04:15:58,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:58,907 INFO L482 AbstractCegarLoop]: Abstraction has 131153 states and 396053 transitions. [2021-06-05 04:15:58,907 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 04:15:58,907 INFO L276 IsEmpty]: Start isEmpty. Operand 131153 states and 396053 transitions. [2021-06-05 04:15:58,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:15:58,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:58,951 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:59,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10036,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:59,152 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:59,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:59,152 INFO L82 PathProgramCache]: Analyzing trace with hash 257571116, now seen corresponding path program 327 times [2021-06-05 04:15:59,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:59,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912440812] [2021-06-05 04:15:59,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:15:59,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:59,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912440812] [2021-06-05 04:15:59,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912440812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:59,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432663452] [2021-06-05 04:15:59,228 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 04:15:59,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:15:59,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:59,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:15:59,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 27 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:15:59,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432663452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:59,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:59,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:15:59,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368190030] [2021-06-05 04:15:59,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:15:59,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:59,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:15:59,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:15:59,295 INFO L87 Difference]: Start difference. First operand 131153 states and 396053 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 04:16:00,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:00,390 INFO L93 Difference]: Finished difference Result 131624 states and 397009 transitions. [2021-06-05 04:16:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:16:00,391 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 24 [2021-06-05 04:16:00,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:00,671 INFO L225 Difference]: With dead ends: 131624 [2021-06-05 04:16:00,671 INFO L226 Difference]: Without dead ends: 131621 [2021-06-05 04:16:00,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:00,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131621 states. [2021-06-05 04:16:02,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131621 to 131141. [2021-06-05 04:16:03,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.0196278786030195) internal successors, (395994), 131140 states have internal predecessors, (395994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:03,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 395994 transitions. [2021-06-05 04:16:03,425 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 395994 transitions. Word has length 24 [2021-06-05 04:16:03,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:03,425 INFO L482 AbstractCegarLoop]: Abstraction has 131141 states and 395994 transitions. [2021-06-05 04:16:03,425 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 04:16:03,425 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 395994 transitions. [2021-06-05 04:16:03,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:16:03,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:03,473 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:03,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10037 [2021-06-05 04:16:03,674 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:03,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:03,674 INFO L82 PathProgramCache]: Analyzing trace with hash -185328024, now seen corresponding path program 328 times [2021-06-05 04:16:03,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:03,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189211138] [2021-06-05 04:16:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:03,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:03,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189211138] [2021-06-05 04:16:03,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189211138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:03,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891968272] [2021-06-05 04:16:03,756 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 04:16:03,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:03,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:03,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:03,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:16:03,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891968272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:03,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:03,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-06-05 04:16:03,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380685484] [2021-06-05 04:16:03,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:16:03,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:03,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:16:03,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:16:03,817 INFO L87 Difference]: Start difference. First operand 131141 states and 395994 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 04:16:04,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:04,962 INFO L93 Difference]: Finished difference Result 131617 states and 396954 transitions. [2021-06-05 04:16:04,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:16:04,963 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 24 [2021-06-05 04:16:04,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:05,287 INFO L225 Difference]: With dead ends: 131617 [2021-06-05 04:16:05,287 INFO L226 Difference]: Without dead ends: 131609 [2021-06-05 04:16:05,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:05,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131609 states. [2021-06-05 04:16:07,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131609 to 131143. [2021-06-05 04:16:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131143 states, 131142 states have (on average 3.01929969041192) internal successors, (395957), 131142 states have internal predecessors, (395957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:07,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131143 states to 131143 states and 395957 transitions. [2021-06-05 04:16:07,891 INFO L78 Accepts]: Start accepts. Automaton has 131143 states and 395957 transitions. Word has length 24 [2021-06-05 04:16:07,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:07,891 INFO L482 AbstractCegarLoop]: Abstraction has 131143 states and 395957 transitions. [2021-06-05 04:16:07,892 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 04:16:07,892 INFO L276 IsEmpty]: Start isEmpty. Operand 131143 states and 395957 transitions. [2021-06-05 04:16:07,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:16:07,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:07,941 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:08,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10038,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:08,142 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:08,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:08,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1030299476, now seen corresponding path program 329 times [2021-06-05 04:16:08,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:08,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535069716] [2021-06-05 04:16:08,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:08,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:08,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535069716] [2021-06-05 04:16:08,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535069716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:08,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521818652] [2021-06-05 04:16:08,238 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 04:16:08,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:16:08,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:08,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:08,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:16:08,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521818652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:08,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:08,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-06-05 04:16:08,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255948355] [2021-06-05 04:16:08,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:16:08,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:08,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:16:08,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:16:08,299 INFO L87 Difference]: Start difference. First operand 131143 states and 395957 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 04:16:08,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:08,903 INFO L93 Difference]: Finished difference Result 131841 states and 397374 transitions. [2021-06-05 04:16:08,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:16:08,904 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 24 [2021-06-05 04:16:08,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:09,184 INFO L225 Difference]: With dead ends: 131841 [2021-06-05 04:16:09,185 INFO L226 Difference]: Without dead ends: 131836 [2021-06-05 04:16:09,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:16:09,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131836 states. [2021-06-05 04:16:11,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131836 to 131145. [2021-06-05 04:16:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131145 states, 131144 states have (on average 3.0192765204660525) internal successors, (395960), 131144 states have internal predecessors, (395960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131145 states to 131145 states and 395960 transitions. [2021-06-05 04:16:12,381 INFO L78 Accepts]: Start accepts. Automaton has 131145 states and 395960 transitions. Word has length 24 [2021-06-05 04:16:12,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:12,381 INFO L482 AbstractCegarLoop]: Abstraction has 131145 states and 395960 transitions. [2021-06-05 04:16:12,381 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 04:16:12,381 INFO L276 IsEmpty]: Start isEmpty. Operand 131145 states and 395960 transitions. [2021-06-05 04:16:12,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:16:12,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:12,426 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:12,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10039 [2021-06-05 04:16:12,626 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:12,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:12,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1454610712, now seen corresponding path program 330 times [2021-06-05 04:16:12,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:12,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578372018] [2021-06-05 04:16:12,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:12,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:12,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578372018] [2021-06-05 04:16:12,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578372018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:12,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420292618] [2021-06-05 04:16:12,713 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 04:16:12,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:16:12,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:12,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:16:12,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:12,775 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:12,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420292618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:12,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:12,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:16:12,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547514191] [2021-06-05 04:16:12,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:16:12,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:12,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:16:12,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:16:12,776 INFO L87 Difference]: Start difference. First operand 131145 states and 395960 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 04:16:13,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:13,443 INFO L93 Difference]: Finished difference Result 131823 states and 397349 transitions. [2021-06-05 04:16:13,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:16:13,443 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 24 [2021-06-05 04:16:13,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:13,703 INFO L225 Difference]: With dead ends: 131823 [2021-06-05 04:16:13,704 INFO L226 Difference]: Without dead ends: 131817 [2021-06-05 04:16:13,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:16:13,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131817 states. [2021-06-05 04:16:16,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131817 to 131145. [2021-06-05 04:16:16,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131145 states, 131144 states have (on average 3.019253644848411) internal successors, (395957), 131144 states have internal predecessors, (395957), 0 states have call successors, (0), 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 04:16:16,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10040,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:16,622 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 04:16:16,624 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 04:16:16,626 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 04:16:16,626 INFO L202 PluginConnector]: Adding new model unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:16:16 BasicIcfg [2021-06-05 04:16:16,626 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 04:16:16,626 INFO L168 Benchmark]: Toolchain (without parser) took 771280.60 ms. Allocated memory was 352.3 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 331.8 MB in the beginning and 9.3 GB in the end (delta: -9.0 GB). Peak memory consumption was 6.7 GB. Max. memory is 16.0 GB. [2021-06-05 04:16:16,626 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 352.3 MB. Free memory was 332.9 MB in the beginning and 332.8 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:16:16,626 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.46 ms. Allocated memory is still 352.3 MB. Free memory was 331.7 MB in the beginning and 330.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:16:16,626 INFO L168 Benchmark]: Boogie Preprocessor took 13.05 ms. Allocated memory is still 352.3 MB. Free memory was 330.2 MB in the beginning and 329.3 MB in the end (delta: 948.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 04:16:16,627 INFO L168 Benchmark]: RCFGBuilder took 341.22 ms. Allocated memory is still 352.3 MB. Free memory was 329.2 MB in the beginning and 314.4 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 04:16:16,627 INFO L168 Benchmark]: TraceAbstraction took 770901.45 ms. Allocated memory was 352.3 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 314.0 MB in the beginning and 9.3 GB in the end (delta: -9.0 GB). Peak memory consumption was 6.7 GB. Max. memory is 16.0 GB. [2021-06-05 04:16:16,627 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 352.3 MB. Free memory was 332.9 MB in the beginning and 332.8 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.46 ms. Allocated memory is still 352.3 MB. Free memory was 331.7 MB in the beginning and 330.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.05 ms. Allocated memory is still 352.3 MB. Free memory was 330.2 MB in the beginning and 329.3 MB in the end (delta: 948.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 341.22 ms. Allocated memory is still 352.3 MB. Free memory was 329.2 MB in the beginning and 314.4 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 770901.45 ms. Allocated memory was 352.3 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 314.0 MB in the beginning and 9.3 GB in the end (delta: -9.0 GB). Peak memory consumption was 6.7 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (78261 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (78261 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (78261 states constructedinput type DoubleDeckerAutomaton). - 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: 770799.2ms, OverallIterations: 334, TraceHistogramMax: 12, EmptinessCheckTime: 6182.2ms, AutomataDifference: 149144.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5666 SDtfs, 26031 SDslu, 33614 SDs, 0 SdLazy, 45503 SolverSat, 8543 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20216.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14126 GetRequests, 6474 SyntacticMatches, 166 SemanticMatches, 7486 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47990 ImplicationChecksByTransitivity, 50638.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=131201occurred in iteration=327, InterpolantAutomatonStates: 6587, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 301327.1ms AutomataMinimizationTime, 334 MinimizatonAttempts, 538927 StatesRemovedByMinimization, 328 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1088.4ms SsaConstructionTime, 3895.7ms SatisfiabilityAnalysisTime, 233744.6ms InterpolantComputationTime, 13589 NumberOfCodeBlocks, 13588 NumberOfCodeBlocksAsserted, 1502 NumberOfCheckSat, 12924 ConstructedInterpolants, 0 QuantifiedInterpolants, 57064 SizeOfPredicates, 170 NumberOfNonLiveVariables, 27606 ConjunctsInSsa, 4623 ConjunctsInUnsatCore, 665 InterpolantComputations, 3 PerfectInterpolantSequences, 11956/32770 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