/usr/bin/java -Xmx8000000000 -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/test/hard1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:51:28,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:51:28,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:51:28,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:51:28,520 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 [2021-07-13 20:51:28,545 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:51:28,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:51:28,546 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:51:28,546 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:51:28,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:51:28,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:51:28,548 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:51:28,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:51:28,549 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:51:28,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:51:28,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:51:28,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:51:28,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:51:28,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:51:28,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:51:28,550 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:51:28,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:51:28,550 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:51:28,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:51:28,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:51:28,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:51:28,551 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:51:28,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:51:28,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:51:28,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:51:28,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:51:28,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:51:28,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:51:28,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:51:28,552 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:51:28,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:51:28,552 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:51:28,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:51:28,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:51:28,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:51:28,827 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:51:28,829 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:51:28,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl [2021-07-13 20:51:28,829 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl' [2021-07-13 20:51:28,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:51:28,849 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:51:28,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:51:28,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:51:28,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:51:28,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:28" (1/1) ... [2021-07-13 20:51:28,866 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:28" (1/1) ... [2021-07-13 20:51:28,870 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:51:28,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:51:28,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:51:28,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:51:28,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:28" (1/1) ... [2021-07-13 20:51:28,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:28" (1/1) ... [2021-07-13 20:51:28,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:28" (1/1) ... [2021-07-13 20:51:28,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:28" (1/1) ... [2021-07-13 20:51:28,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:28" (1/1) ... [2021-07-13 20:51:28,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:28" (1/1) ... [2021-07-13 20:51:28,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:28" (1/1) ... [2021-07-13 20:51:28,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:51:28,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:51:28,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:51:28,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:51:28,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:28" (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 [2021-07-13 20:51:28,935 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:51:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:51:28,935 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:51:28,935 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:51:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:51:28,936 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:51:28,936 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:51:28,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:51:28,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:51:28,936 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:51:28,936 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:51:28,936 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:51:28,936 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-13 20:51:28,936 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-13 20:51:28,936 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-13 20:51:28,937 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:51:29,131 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:51:29,131 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:51:29,132 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:51:29 BoogieIcfgContainer [2021-07-13 20:51:29,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:51:29,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:51:29,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:51:29,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:51:29,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:51:28" (1/2) ... [2021-07-13 20:51:29,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62853873 and model type hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:51:29, skipping insertion in model container [2021-07-13 20:51:29,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:51:29" (2/2) ... [2021-07-13 20:51:29,138 INFO L111 eAbstractionObserver]: Analyzing ICFG hard1.wvr.bpl [2021-07-13 20:51:29,152 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:51:29,152 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:51:29,152 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:51:29,153 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:51:29,208 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-13 20:51:29,223 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-13 20:51:29,237 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:51:29,237 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:51:29,237 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:51:29,237 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:51:29,237 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:51:29,237 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:51:29,238 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:51:29,238 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:51:29,244 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2021-07-13 20:51:29,296 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:29,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:51:29,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:29,322 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:29,323 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:29,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:29,327 INFO L82 PathProgramCache]: Analyzing trace with hash 2030693196, now seen corresponding path program 1 times [2021-07-13 20:51:29,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:29,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077487077] [2021-07-13 20:51:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:29,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:29,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077487077] [2021-07-13 20:51:29,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077487077] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:51:29,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:51:29,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:51:29,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263387903] [2021-07-13 20:51:29,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:51:29,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:29,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:51:29,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:51:29,531 INFO L87 Difference]: Start difference. First operand has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 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) [2021-07-13 20:51:29,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:29,604 INFO L93 Difference]: Finished difference Result 854 states and 3302 transitions. [2021-07-13 20:51:29,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:51:29,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 19 [2021-07-13 20:51:29,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:29,625 INFO L225 Difference]: With dead ends: 854 [2021-07-13 20:51:29,626 INFO L226 Difference]: Without dead ends: 823 [2021-07-13 20:51:29,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:51:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-07-13 20:51:29,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2021-07-13 20:51:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.8545780969479355) internal successors, (2147), 557 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:29,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2021-07-13 20:51:29,702 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2021-07-13 20:51:29,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:29,703 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2021-07-13 20:51:29,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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) [2021-07-13 20:51:29,703 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2021-07-13 20:51:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:51:29,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:29,706 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:29,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:51:29,707 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:29,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:29,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1569931572, now seen corresponding path program 1 times [2021-07-13 20:51:29,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:29,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714574478] [2021-07-13 20:51:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:29,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:29,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714574478] [2021-07-13 20:51:29,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714574478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:29,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912071305] [2021-07-13 20:51:29,761 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 [2021-07-13 20:51:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:29,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 20:51:29,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:29,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912071305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:29,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:29,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-13 20:51:29,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256711940] [2021-07-13 20:51:30,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:51:30,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:30,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:51:30,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:30,001 INFO L87 Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2021-07-13 20:51:30,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:30,154 INFO L93 Difference]: Finished difference Result 1573 states and 5792 transitions. [2021-07-13 20:51:30,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:51:30,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 21 [2021-07-13 20:51:30,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:30,167 INFO L225 Difference]: With dead ends: 1573 [2021-07-13 20:51:30,167 INFO L226 Difference]: Without dead ends: 1573 [2021-07-13 20:51:30,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:51:30,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2021-07-13 20:51:30,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 863. [2021-07-13 20:51:30,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.960556844547564) internal successors, (3414), 862 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:30,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 3414 transitions. [2021-07-13 20:51:30,218 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 3414 transitions. Word has length 21 [2021-07-13 20:51:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:30,218 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 3414 transitions. [2021-07-13 20:51:30,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2021-07-13 20:51:30,219 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 3414 transitions. [2021-07-13 20:51:30,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:51:30,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:30,222 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:30,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 20:51:30,437 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:30,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:30,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1649103282, now seen corresponding path program 1 times [2021-07-13 20:51:30,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:30,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36230188] [2021-07-13 20:51:30,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:30,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:30,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36230188] [2021-07-13 20:51:30,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36230188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:30,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899899551] [2021-07-13 20:51:30,539 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 [2021-07-13 20:51:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:30,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 20:51:30,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:30,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899899551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:30,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:30,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-13 20:51:30,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78583832] [2021-07-13 20:51:30,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:51:30,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:30,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:51:30,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:30,645 INFO L87 Difference]: Start difference. First operand 863 states and 3414 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2021-07-13 20:51:30,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:30,724 INFO L93 Difference]: Finished difference Result 1748 states and 6572 transitions. [2021-07-13 20:51:30,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:51:30,724 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 21 [2021-07-13 20:51:30,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:30,734 INFO L225 Difference]: With dead ends: 1748 [2021-07-13 20:51:30,734 INFO L226 Difference]: Without dead ends: 1748 [2021-07-13 20:51:30,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:51:30,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-07-13 20:51:30,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 927. [2021-07-13 20:51:30,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 3.970842332613391) internal successors, (3677), 926 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 3677 transitions. [2021-07-13 20:51:30,762 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 3677 transitions. Word has length 21 [2021-07-13 20:51:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:30,762 INFO L482 AbstractCegarLoop]: Abstraction has 927 states and 3677 transitions. [2021-07-13 20:51:30,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2021-07-13 20:51:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 3677 transitions. [2021-07-13 20:51:30,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:51:30,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:30,765 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:30,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:30,981 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:30,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:30,981 INFO L82 PathProgramCache]: Analyzing trace with hash -247825074, now seen corresponding path program 1 times [2021-07-13 20:51:30,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:30,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469648179] [2021-07-13 20:51:30,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:31,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:31,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469648179] [2021-07-13 20:51:31,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469648179] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:51:31,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:51:31,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:51:31,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767488404] [2021-07-13 20:51:31,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:51:31,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:31,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:51:31,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:51:31,021 INFO L87 Difference]: Start difference. First operand 927 states and 3677 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2021-07-13 20:51:31,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:31,078 INFO L93 Difference]: Finished difference Result 997 states and 3621 transitions. [2021-07-13 20:51:31,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:51:31,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 21 [2021-07-13 20:51:31,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:31,084 INFO L225 Difference]: With dead ends: 997 [2021-07-13 20:51:31,084 INFO L226 Difference]: Without dead ends: 884 [2021-07-13 20:51:31,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:51:31,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-07-13 20:51:31,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 808. [2021-07-13 20:51:31,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.758364312267658) internal successors, (3033), 807 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:31,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 3033 transitions. [2021-07-13 20:51:31,103 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 3033 transitions. Word has length 21 [2021-07-13 20:51:31,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:31,104 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 3033 transitions. [2021-07-13 20:51:31,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2021-07-13 20:51:31,104 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 3033 transitions. [2021-07-13 20:51:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:51:31,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:31,107 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:31,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 20:51:31,107 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:31,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:31,107 INFO L82 PathProgramCache]: Analyzing trace with hash 202909006, now seen corresponding path program 2 times [2021-07-13 20:51:31,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:31,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935074701] [2021-07-13 20:51:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:31,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:31,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935074701] [2021-07-13 20:51:31,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935074701] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:51:31,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:51:31,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:51:31,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696505766] [2021-07-13 20:51:31,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:51:31,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:31,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:51:31,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:51:31,179 INFO L87 Difference]: Start difference. First operand 808 states and 3033 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2021-07-13 20:51:31,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:31,222 INFO L93 Difference]: Finished difference Result 949 states and 3541 transitions. [2021-07-13 20:51:31,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:51:31,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 21 [2021-07-13 20:51:31,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:31,227 INFO L225 Difference]: With dead ends: 949 [2021-07-13 20:51:31,227 INFO L226 Difference]: Without dead ends: 949 [2021-07-13 20:51:31,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:51:31,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-07-13 20:51:31,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 729. [2021-07-13 20:51:31,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.782967032967033) internal successors, (2754), 728 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2754 transitions. [2021-07-13 20:51:31,248 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2754 transitions. Word has length 21 [2021-07-13 20:51:31,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:31,248 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2754 transitions. [2021-07-13 20:51:31,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2021-07-13 20:51:31,248 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2754 transitions. [2021-07-13 20:51:31,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:31,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:31,250 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:31,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 20:51:31,251 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:31,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:31,251 INFO L82 PathProgramCache]: Analyzing trace with hash -105864754, now seen corresponding path program 1 times [2021-07-13 20:51:31,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:31,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205842836] [2021-07-13 20:51:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:31,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:31,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205842836] [2021-07-13 20:51:31,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205842836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:31,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865758443] [2021-07-13 20:51:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2021-07-13 20:51:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:31,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:51:31,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:31,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865758443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:31,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:31,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-07-13 20:51:31,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537813102] [2021-07-13 20:51:31,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:51:31,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:31,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:51:31,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:51:31,398 INFO L87 Difference]: Start difference. First operand 729 states and 2754 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-07-13 20:51:31,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:31,505 INFO L93 Difference]: Finished difference Result 1389 states and 5122 transitions. [2021-07-13 20:51:31,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:51:31,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:51:31,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:31,513 INFO L225 Difference]: With dead ends: 1389 [2021-07-13 20:51:31,513 INFO L226 Difference]: Without dead ends: 1389 [2021-07-13 20:51:31,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:51:31,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-07-13 20:51:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 892. [2021-07-13 20:51:31,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.772166105499439) internal successors, (3361), 891 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:31,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3361 transitions. [2021-07-13 20:51:31,538 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3361 transitions. Word has length 23 [2021-07-13 20:51:31,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:31,539 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3361 transitions. [2021-07-13 20:51:31,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-07-13 20:51:31,539 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3361 transitions. [2021-07-13 20:51:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:31,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:31,541 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:31,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:31,757 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:31,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:31,757 INFO L82 PathProgramCache]: Analyzing trace with hash 993256014, now seen corresponding path program 1 times [2021-07-13 20:51:31,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:31,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960974088] [2021-07-13 20:51:31,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:31,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:31,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960974088] [2021-07-13 20:51:31,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960974088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:31,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144009612] [2021-07-13 20:51:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-13 20:51:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:31,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:31,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:31,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144009612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:31,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:31,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:51:31,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892143517] [2021-07-13 20:51:31,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:51:31,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:31,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:51:31,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:31,873 INFO L87 Difference]: Start difference. First operand 892 states and 3361 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:31,935 INFO L93 Difference]: Finished difference Result 1781 states and 6589 transitions. [2021-07-13 20:51:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:51:31,935 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-07-13 20:51:31,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:31,943 INFO L225 Difference]: With dead ends: 1781 [2021-07-13 20:51:31,943 INFO L226 Difference]: Without dead ends: 1738 [2021-07-13 20:51:31,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:31,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-07-13 20:51:31,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1055. [2021-07-13 20:51:31,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 3.8055028462998104) internal successors, (4011), 1054 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:31,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 4011 transitions. [2021-07-13 20:51:31,969 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 4011 transitions. Word has length 23 [2021-07-13 20:51:31,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:31,969 INFO L482 AbstractCegarLoop]: Abstraction has 1055 states and 4011 transitions. [2021-07-13 20:51:31,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:31,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 4011 transitions. [2021-07-13 20:51:31,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:31,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:31,972 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:32,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:32,177 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:32,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:32,177 INFO L82 PathProgramCache]: Analyzing trace with hash -516640296, now seen corresponding path program 2 times [2021-07-13 20:51:32,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:32,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024910280] [2021-07-13 20:51:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:32,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:32,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024910280] [2021-07-13 20:51:32,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024910280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:32,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004701611] [2021-07-13 20:51:32,231 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 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 [2021-07-13 20:51:32,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:51:32,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:32,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:32,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:32,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004701611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:32,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:32,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:51:32,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907792609] [2021-07-13 20:51:32,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:51:32,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:32,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:51:32,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:32,308 INFO L87 Difference]: Start difference. First operand 1055 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:32,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:32,381 INFO L93 Difference]: Finished difference Result 1504 states and 5657 transitions. [2021-07-13 20:51:32,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:51:32,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-07-13 20:51:32,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:32,388 INFO L225 Difference]: With dead ends: 1504 [2021-07-13 20:51:32,388 INFO L226 Difference]: Without dead ends: 1461 [2021-07-13 20:51:32,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-07-13 20:51:32,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1067. [2021-07-13 20:51:32,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.8227016885553473) internal successors, (4075), 1066 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:32,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 4075 transitions. [2021-07-13 20:51:32,413 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 4075 transitions. Word has length 23 [2021-07-13 20:51:32,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:32,413 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 4075 transitions. [2021-07-13 20:51:32,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:32,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 4075 transitions. [2021-07-13 20:51:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:32,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:32,416 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:32,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:32,641 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:32,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:32,641 INFO L82 PathProgramCache]: Analyzing trace with hash -28423604, now seen corresponding path program 3 times [2021-07-13 20:51:32,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:32,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240152522] [2021-07-13 20:51:32,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:32,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:32,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240152522] [2021-07-13 20:51:32,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240152522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:32,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525258354] [2021-07-13 20:51:32,689 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 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 [2021-07-13 20:51:32,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:51:32,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:32,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:32,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:32,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525258354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:32,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:32,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:51:32,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144969863] [2021-07-13 20:51:32,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:51:32,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:32,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:51:32,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:32,770 INFO L87 Difference]: Start difference. First operand 1067 states and 4075 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:32,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:32,838 INFO L93 Difference]: Finished difference Result 1444 states and 5469 transitions. [2021-07-13 20:51:32,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:51:32,838 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-07-13 20:51:32,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:32,847 INFO L225 Difference]: With dead ends: 1444 [2021-07-13 20:51:32,847 INFO L226 Difference]: Without dead ends: 1401 [2021-07-13 20:51:32,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:32,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-07-13 20:51:32,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1086. [2021-07-13 20:51:32,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 3.8359447004608294) internal successors, (4162), 1085 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:32,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 4162 transitions. [2021-07-13 20:51:32,885 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 4162 transitions. Word has length 23 [2021-07-13 20:51:32,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:32,886 INFO L482 AbstractCegarLoop]: Abstraction has 1086 states and 4162 transitions. [2021-07-13 20:51:32,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:32,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 4162 transitions. [2021-07-13 20:51:32,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:32,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:32,888 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:33,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:33,104 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:33,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1774155824, now seen corresponding path program 1 times [2021-07-13 20:51:33,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:33,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424045033] [2021-07-13 20:51:33,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:33,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:33,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424045033] [2021-07-13 20:51:33,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424045033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:33,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702154409] [2021-07-13 20:51:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-13 20:51:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:33,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:33,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:33,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702154409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:33,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:33,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:51:33,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213889506] [2021-07-13 20:51:33,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:51:33,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:33,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:51:33,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:33,201 INFO L87 Difference]: Start difference. First operand 1086 states and 4162 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:33,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:33,301 INFO L93 Difference]: Finished difference Result 2517 states and 9613 transitions. [2021-07-13 20:51:33,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:51:33,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-07-13 20:51:33,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:33,313 INFO L225 Difference]: With dead ends: 2517 [2021-07-13 20:51:33,313 INFO L226 Difference]: Without dead ends: 2474 [2021-07-13 20:51:33,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:33,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-07-13 20:51:33,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1252. [2021-07-13 20:51:33,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 3.906474820143885) internal successors, (4887), 1251 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 4887 transitions. [2021-07-13 20:51:33,349 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 4887 transitions. Word has length 23 [2021-07-13 20:51:33,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:33,349 INFO L482 AbstractCegarLoop]: Abstraction has 1252 states and 4887 transitions. [2021-07-13 20:51:33,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:33,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 4887 transitions. [2021-07-13 20:51:33,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:33,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:33,353 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:33,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 20:51:33,561 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:33,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:33,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1061650696, now seen corresponding path program 2 times [2021-07-13 20:51:33,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:33,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90828550] [2021-07-13 20:51:33,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:33,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:33,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90828550] [2021-07-13 20:51:33,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90828550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:33,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959835139] [2021-07-13 20:51:33,602 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 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 [2021-07-13 20:51:33,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:51:33,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:33,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:33,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:33,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959835139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:33,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:33,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:51:33,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587202210] [2021-07-13 20:51:33,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:51:33,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:33,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:51:33,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:33,688 INFO L87 Difference]: Start difference. First operand 1252 states and 4887 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:33,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:33,763 INFO L93 Difference]: Finished difference Result 2128 states and 8197 transitions. [2021-07-13 20:51:33,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:51:33,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-07-13 20:51:33,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:33,769 INFO L225 Difference]: With dead ends: 2128 [2021-07-13 20:51:33,769 INFO L226 Difference]: Without dead ends: 2085 [2021-07-13 20:51:33,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2021-07-13 20:51:33,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1324. [2021-07-13 20:51:33,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.9554043839758126) internal successors, (5233), 1323 states have internal predecessors, (5233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:33,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 5233 transitions. [2021-07-13 20:51:33,810 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 5233 transitions. Word has length 23 [2021-07-13 20:51:33,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:33,810 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 5233 transitions. [2021-07-13 20:51:33,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:33,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 5233 transitions. [2021-07-13 20:51:33,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:33,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:33,813 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:34,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-13 20:51:34,029 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:34,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:34,029 INFO L82 PathProgramCache]: Analyzing trace with hash -709945864, now seen corresponding path program 3 times [2021-07-13 20:51:34,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:34,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601279871] [2021-07-13 20:51:34,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:34,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:34,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601279871] [2021-07-13 20:51:34,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601279871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:34,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571396523] [2021-07-13 20:51:34,069 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 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 [2021-07-13 20:51:34,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:51:34,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:34,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:34,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:34,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571396523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:34,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:34,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:51:34,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423214398] [2021-07-13 20:51:34,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:51:34,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:34,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:51:34,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:34,139 INFO L87 Difference]: Start difference. First operand 1324 states and 5233 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:34,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:34,202 INFO L93 Difference]: Finished difference Result 2247 states and 8749 transitions. [2021-07-13 20:51:34,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:51:34,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-07-13 20:51:34,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:34,208 INFO L225 Difference]: With dead ends: 2247 [2021-07-13 20:51:34,208 INFO L226 Difference]: Without dead ends: 2204 [2021-07-13 20:51:34,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:34,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-07-13 20:51:34,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1380. [2021-07-13 20:51:34,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.989122552574329) internal successors, (5501), 1379 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:34,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 5501 transitions. [2021-07-13 20:51:34,238 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 5501 transitions. Word has length 23 [2021-07-13 20:51:34,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:34,238 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 5501 transitions. [2021-07-13 20:51:34,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:34,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 5501 transitions. [2021-07-13 20:51:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:34,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:34,242 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:34,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:34,453 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:34,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:34,453 INFO L82 PathProgramCache]: Analyzing trace with hash -2081052592, now seen corresponding path program 1 times [2021-07-13 20:51:34,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:34,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417899662] [2021-07-13 20:51:34,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:34,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:34,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417899662] [2021-07-13 20:51:34,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417899662] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:51:34,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:51:34,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:51:34,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820185390] [2021-07-13 20:51:34,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:51:34,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:34,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:51:34,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:51:34,475 INFO L87 Difference]: Start difference. First operand 1380 states and 5501 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-07-13 20:51:34,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:34,507 INFO L93 Difference]: Finished difference Result 1413 states and 5603 transitions. [2021-07-13 20:51:34,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:51:34,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 23 [2021-07-13 20:51:34,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:34,512 INFO L225 Difference]: With dead ends: 1413 [2021-07-13 20:51:34,512 INFO L226 Difference]: Without dead ends: 1413 [2021-07-13 20:51:34,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:51:34,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-07-13 20:51:34,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1394. [2021-07-13 20:51:34,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.974156496769562) internal successors, (5536), 1393 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:34,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 5536 transitions. [2021-07-13 20:51:34,543 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 5536 transitions. Word has length 23 [2021-07-13 20:51:34,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:34,544 INFO L482 AbstractCegarLoop]: Abstraction has 1394 states and 5536 transitions. [2021-07-13 20:51:34,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-07-13 20:51:34,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 5536 transitions. [2021-07-13 20:51:34,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:34,547 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:34,547 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:34,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-13 20:51:34,548 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:34,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:34,548 INFO L82 PathProgramCache]: Analyzing trace with hash 705218512, now seen corresponding path program 4 times [2021-07-13 20:51:34,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:34,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63271718] [2021-07-13 20:51:34,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:34,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:34,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63271718] [2021-07-13 20:51:34,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63271718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:34,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38977974] [2021-07-13 20:51:34,575 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 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 [2021-07-13 20:51:34,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:51:34,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:34,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:34,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:34,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38977974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:34,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:34,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:51:34,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482289039] [2021-07-13 20:51:34,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:51:34,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:34,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:51:34,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:34,658 INFO L87 Difference]: Start difference. First operand 1394 states and 5536 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:34,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:34,720 INFO L93 Difference]: Finished difference Result 2930 states and 11376 transitions. [2021-07-13 20:51:34,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:51:34,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-07-13 20:51:34,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:34,728 INFO L225 Difference]: With dead ends: 2930 [2021-07-13 20:51:34,729 INFO L226 Difference]: Without dead ends: 2887 [2021-07-13 20:51:34,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:34,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2021-07-13 20:51:34,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 1526. [2021-07-13 20:51:34,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 4.028196721311476) internal successors, (6143), 1525 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 6143 transitions. [2021-07-13 20:51:34,764 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 6143 transitions. Word has length 23 [2021-07-13 20:51:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:34,764 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 6143 transitions. [2021-07-13 20:51:34,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 6143 transitions. [2021-07-13 20:51:34,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:34,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:34,767 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:34,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:34,977 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:34,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:34,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1829695844, now seen corresponding path program 5 times [2021-07-13 20:51:34,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:34,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256603069] [2021-07-13 20:51:34,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:35,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:35,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256603069] [2021-07-13 20:51:35,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256603069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:35,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056737747] [2021-07-13 20:51:35,006 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 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 [2021-07-13 20:51:35,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:51:35,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:35,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:35,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:35,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056737747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:35,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:35,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:51:35,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899793433] [2021-07-13 20:51:35,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:51:35,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:35,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:51:35,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:35,064 INFO L87 Difference]: Start difference. First operand 1526 states and 6143 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:35,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:35,117 INFO L93 Difference]: Finished difference Result 2434 states and 9626 transitions. [2021-07-13 20:51:35,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:51:35,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-07-13 20:51:35,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:35,124 INFO L225 Difference]: With dead ends: 2434 [2021-07-13 20:51:35,124 INFO L226 Difference]: Without dead ends: 2391 [2021-07-13 20:51:35,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:35,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-07-13 20:51:35,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1578. [2021-07-13 20:51:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 4.062777425491439) internal successors, (6407), 1577 states have internal predecessors, (6407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 6407 transitions. [2021-07-13 20:51:35,157 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 6407 transitions. Word has length 23 [2021-07-13 20:51:35,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:35,157 INFO L482 AbstractCegarLoop]: Abstraction has 1578 states and 6407 transitions. [2021-07-13 20:51:35,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:35,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 6407 transitions. [2021-07-13 20:51:35,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:35,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:35,160 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:35,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:51:35,376 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:35,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:35,376 INFO L82 PathProgramCache]: Analyzing trace with hash 693674892, now seen corresponding path program 6 times [2021-07-13 20:51:35,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:35,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525537032] [2021-07-13 20:51:35,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:35,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:35,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525537032] [2021-07-13 20:51:35,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525537032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:35,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790266962] [2021-07-13 20:51:35,419 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 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 [2021-07-13 20:51:35,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:51:35,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:35,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:35,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:35,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790266962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:35,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:35,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 20:51:35,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811476111] [2021-07-13 20:51:35,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:51:35,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:35,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:51:35,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:51:35,508 INFO L87 Difference]: Start difference. First operand 1578 states and 6407 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-07-13 20:51:35,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:35,620 INFO L93 Difference]: Finished difference Result 2600 states and 10380 transitions. [2021-07-13 20:51:35,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:51:35,620 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:51:35,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:35,627 INFO L225 Difference]: With dead ends: 2600 [2021-07-13 20:51:35,627 INFO L226 Difference]: Without dead ends: 2557 [2021-07-13 20:51:35,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:51:35,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-07-13 20:51:35,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 1678. [2021-07-13 20:51:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 4.128205128205129) internal successors, (6923), 1677 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6923 transitions. [2021-07-13 20:51:35,664 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6923 transitions. Word has length 23 [2021-07-13 20:51:35,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:35,664 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 6923 transitions. [2021-07-13 20:51:35,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-07-13 20:51:35,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6923 transitions. [2021-07-13 20:51:35,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:35,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:35,667 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:35,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 20:51:35,881 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:35,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:35,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1462519728, now seen corresponding path program 2 times [2021-07-13 20:51:35,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:35,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988830332] [2021-07-13 20:51:35,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:35,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:35,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988830332] [2021-07-13 20:51:35,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988830332] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:51:35,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:51:35,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:51:35,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579902113] [2021-07-13 20:51:35,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:51:35,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:35,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:51:35,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:51:35,904 INFO L87 Difference]: Start difference. First operand 1678 states and 6923 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2021-07-13 20:51:35,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:35,944 INFO L93 Difference]: Finished difference Result 1899 states and 7725 transitions. [2021-07-13 20:51:35,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:51:35,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 23 [2021-07-13 20:51:35,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:35,949 INFO L225 Difference]: With dead ends: 1899 [2021-07-13 20:51:35,949 INFO L226 Difference]: Without dead ends: 1866 [2021-07-13 20:51:35,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:51:35,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-07-13 20:51:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1777. [2021-07-13 20:51:35,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1776 states have (on average 4.108671171171171) internal successors, (7297), 1776 states have internal predecessors, (7297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:35,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 7297 transitions. [2021-07-13 20:51:35,982 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 7297 transitions. Word has length 23 [2021-07-13 20:51:35,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:35,982 INFO L482 AbstractCegarLoop]: Abstraction has 1777 states and 7297 transitions. [2021-07-13 20:51:35,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2021-07-13 20:51:35,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 7297 transitions. [2021-07-13 20:51:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:35,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:35,986 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:35,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-07-13 20:51:35,986 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:35,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:35,986 INFO L82 PathProgramCache]: Analyzing trace with hash 97493908, now seen corresponding path program 2 times [2021-07-13 20:51:35,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:35,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650259511] [2021-07-13 20:51:35,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:36,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:36,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650259511] [2021-07-13 20:51:36,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650259511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:36,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050124494] [2021-07-13 20:51:36,001 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:51:36,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:51:36,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:36,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:51:36,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:36,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050124494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:36,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:36,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-07-13 20:51:36,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853997066] [2021-07-13 20:51:36,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:51:36,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:36,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:51:36,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:51:36,078 INFO L87 Difference]: Start difference. First operand 1777 states and 7297 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-07-13 20:51:36,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:36,210 INFO L93 Difference]: Finished difference Result 3584 states and 13842 transitions. [2021-07-13 20:51:36,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:51:36,210 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:51:36,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:36,220 INFO L225 Difference]: With dead ends: 3584 [2021-07-13 20:51:36,220 INFO L226 Difference]: Without dead ends: 3584 [2021-07-13 20:51:36,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:51:36,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2021-07-13 20:51:36,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 2158. [2021-07-13 20:51:36,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 4.179879462216041) internal successors, (9016), 2157 states have internal predecessors, (9016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:36,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 9016 transitions. [2021-07-13 20:51:36,271 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 9016 transitions. Word has length 23 [2021-07-13 20:51:36,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:36,271 INFO L482 AbstractCegarLoop]: Abstraction has 2158 states and 9016 transitions. [2021-07-13 20:51:36,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-07-13 20:51:36,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 9016 transitions. [2021-07-13 20:51:36,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:36,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:36,276 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:36,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 20:51:36,489 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:36,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:36,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1352231348, now seen corresponding path program 3 times [2021-07-13 20:51:36,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:36,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580303335] [2021-07-13 20:51:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:36,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:36,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580303335] [2021-07-13 20:51:36,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580303335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:36,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677136922] [2021-07-13 20:51:36,504 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 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 [2021-07-13 20:51:36,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:51:36,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:36,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:51:36,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:36,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677136922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:36,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:36,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-07-13 20:51:36,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40095760] [2021-07-13 20:51:36,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:51:36,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:36,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:51:36,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:51:36,571 INFO L87 Difference]: Start difference. First operand 2158 states and 9016 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-07-13 20:51:36,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:36,781 INFO L93 Difference]: Finished difference Result 4126 states and 16268 transitions. [2021-07-13 20:51:36,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:51:36,781 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:51:36,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:36,823 INFO L225 Difference]: With dead ends: 4126 [2021-07-13 20:51:36,823 INFO L226 Difference]: Without dead ends: 4126 [2021-07-13 20:51:36,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:51:36,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-07-13 20:51:36,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2337. [2021-07-13 20:51:36,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 4.2555650684931505) internal successors, (9941), 2336 states have internal predecessors, (9941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 9941 transitions. [2021-07-13 20:51:36,881 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 9941 transitions. Word has length 23 [2021-07-13 20:51:36,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:36,881 INFO L482 AbstractCegarLoop]: Abstraction has 2337 states and 9941 transitions. [2021-07-13 20:51:36,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-07-13 20:51:36,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 9941 transitions. [2021-07-13 20:51:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:36,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:36,886 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:37,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:37,103 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:37,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:37,103 INFO L82 PathProgramCache]: Analyzing trace with hash -424342964, now seen corresponding path program 4 times [2021-07-13 20:51:37,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:37,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958876694] [2021-07-13 20:51:37,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:37,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:37,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958876694] [2021-07-13 20:51:37,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958876694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:37,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915318699] [2021-07-13 20:51:37,141 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 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 [2021-07-13 20:51:37,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:51:37,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:37,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:37,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:37,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915318699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:37,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:37,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:51:37,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902097844] [2021-07-13 20:51:37,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:51:37,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:37,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:51:37,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:37,208 INFO L87 Difference]: Start difference. First operand 2337 states and 9941 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:37,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:37,275 INFO L93 Difference]: Finished difference Result 2707 states and 11337 transitions. [2021-07-13 20:51:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:51:37,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-07-13 20:51:37,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:37,282 INFO L225 Difference]: With dead ends: 2707 [2021-07-13 20:51:37,283 INFO L226 Difference]: Without dead ends: 2643 [2021-07-13 20:51:37,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-07-13 20:51:37,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2343. [2021-07-13 20:51:37,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 4.259180187873612) internal successors, (9975), 2342 states have internal predecessors, (9975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 9975 transitions. [2021-07-13 20:51:37,328 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 9975 transitions. Word has length 23 [2021-07-13 20:51:37,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:37,328 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 9975 transitions. [2021-07-13 20:51:37,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:37,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 9975 transitions. [2021-07-13 20:51:37,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:37,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:37,333 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:37,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:37,549 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:37,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:37,549 INFO L82 PathProgramCache]: Analyzing trace with hash 63873728, now seen corresponding path program 5 times [2021-07-13 20:51:37,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:37,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767344284] [2021-07-13 20:51:37,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:37,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:37,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767344284] [2021-07-13 20:51:37,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767344284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:37,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562064250] [2021-07-13 20:51:37,604 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 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 [2021-07-13 20:51:37,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:51:37,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:37,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:37,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:37,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562064250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:37,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:37,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:51:37,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124501533] [2021-07-13 20:51:37,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:51:37,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:37,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:51:37,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:37,681 INFO L87 Difference]: Start difference. First operand 2343 states and 9975 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:37,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:37,742 INFO L93 Difference]: Finished difference Result 2722 states and 11385 transitions. [2021-07-13 20:51:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:51:37,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-07-13 20:51:37,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:37,749 INFO L225 Difference]: With dead ends: 2722 [2021-07-13 20:51:37,749 INFO L226 Difference]: Without dead ends: 2658 [2021-07-13 20:51:37,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:37,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2658 states. [2021-07-13 20:51:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2658 to 2347. [2021-07-13 20:51:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 4.2621483375959075) internal successors, (9999), 2346 states have internal predecessors, (9999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:37,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 9999 transitions. [2021-07-13 20:51:37,803 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 9999 transitions. Word has length 23 [2021-07-13 20:51:37,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:37,804 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 9999 transitions. [2021-07-13 20:51:37,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:37,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 9999 transitions. [2021-07-13 20:51:37,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:37,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:37,808 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:38,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:38,025 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:38,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:38,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1522443284, now seen corresponding path program 6 times [2021-07-13 20:51:38,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:38,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349433762] [2021-07-13 20:51:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:38,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:38,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349433762] [2021-07-13 20:51:38,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349433762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:38,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107205637] [2021-07-13 20:51:38,078 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 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 [2021-07-13 20:51:38,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:51:38,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:38,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:38,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:38,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107205637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:38,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:38,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:51:38,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711122231] [2021-07-13 20:51:38,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:51:38,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:38,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:51:38,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:38,141 INFO L87 Difference]: Start difference. First operand 2347 states and 9999 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:38,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:38,206 INFO L93 Difference]: Finished difference Result 3086 states and 12754 transitions. [2021-07-13 20:51:38,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:51:38,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-07-13 20:51:38,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:38,213 INFO L225 Difference]: With dead ends: 3086 [2021-07-13 20:51:38,213 INFO L226 Difference]: Without dead ends: 3022 [2021-07-13 20:51:38,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:51:38,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-07-13 20:51:38,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2368. [2021-07-13 20:51:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 4.27291930713984) internal successors, (10114), 2367 states have internal predecessors, (10114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:38,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 10114 transitions. [2021-07-13 20:51:38,261 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 10114 transitions. Word has length 23 [2021-07-13 20:51:38,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:38,261 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 10114 transitions. [2021-07-13 20:51:38,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-07-13 20:51:38,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 10114 transitions. [2021-07-13 20:51:38,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:38,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:38,284 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:38,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 20:51:38,497 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:38,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:38,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1523854228, now seen corresponding path program 3 times [2021-07-13 20:51:38,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:38,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71087071] [2021-07-13 20:51:38,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:38,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:38,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71087071] [2021-07-13 20:51:38,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71087071] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:51:38,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:51:38,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:51:38,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468029492] [2021-07-13 20:51:38,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:51:38,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:38,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:51:38,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:51:38,513 INFO L87 Difference]: Start difference. First operand 2368 states and 10114 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2021-07-13 20:51:38,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:38,557 INFO L93 Difference]: Finished difference Result 2525 states and 10725 transitions. [2021-07-13 20:51:38,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:51:38,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 23 [2021-07-13 20:51:38,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:38,562 INFO L225 Difference]: With dead ends: 2525 [2021-07-13 20:51:38,563 INFO L226 Difference]: Without dead ends: 2525 [2021-07-13 20:51:38,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:51:38,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-07-13 20:51:38,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 2414. [2021-07-13 20:51:38,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 4.261500207210941) internal successors, (10283), 2413 states have internal predecessors, (10283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 10283 transitions. [2021-07-13 20:51:38,602 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 10283 transitions. Word has length 23 [2021-07-13 20:51:38,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:38,602 INFO L482 AbstractCegarLoop]: Abstraction has 2414 states and 10283 transitions. [2021-07-13 20:51:38,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2021-07-13 20:51:38,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 10283 transitions. [2021-07-13 20:51:38,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:38,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:38,607 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:38,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-07-13 20:51:38,607 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:38,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:38,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1093628820, now seen corresponding path program 4 times [2021-07-13 20:51:38,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:38,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517138424] [2021-07-13 20:51:38,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:38,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:38,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517138424] [2021-07-13 20:51:38,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517138424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:38,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088010485] [2021-07-13 20:51:38,627 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 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 [2021-07-13 20:51:38,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:51:38,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:38,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:51:38,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:38,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088010485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:38,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:38,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-07-13 20:51:38,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922960336] [2021-07-13 20:51:38,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:51:38,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:38,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:51:38,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:51:38,705 INFO L87 Difference]: Start difference. First operand 2414 states and 10283 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-07-13 20:51:38,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:38,794 INFO L93 Difference]: Finished difference Result 3537 states and 14681 transitions. [2021-07-13 20:51:38,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:51:38,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:51:38,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:38,802 INFO L225 Difference]: With dead ends: 3537 [2021-07-13 20:51:38,802 INFO L226 Difference]: Without dead ends: 3537 [2021-07-13 20:51:38,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:51:38,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-07-13 20:51:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2731. [2021-07-13 20:51:38,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2730 states have (on average 4.247252747252747) internal successors, (11595), 2730 states have internal predecessors, (11595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:38,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 11595 transitions. [2021-07-13 20:51:38,852 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 11595 transitions. Word has length 23 [2021-07-13 20:51:38,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:38,852 INFO L482 AbstractCegarLoop]: Abstraction has 2731 states and 11595 transitions. [2021-07-13 20:51:38,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-07-13 20:51:38,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 11595 transitions. [2021-07-13 20:51:38,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:38,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:38,880 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:39,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 20:51:39,081 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:39,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:39,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1241815956, now seen corresponding path program 5 times [2021-07-13 20:51:39,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:39,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700019358] [2021-07-13 20:51:39,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:39,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:39,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700019358] [2021-07-13 20:51:39,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700019358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:39,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159779202] [2021-07-13 20:51:39,096 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 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 [2021-07-13 20:51:39,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:51:39,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:39,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:51:39,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:39,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159779202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:39,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:39,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-07-13 20:51:39,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705687424] [2021-07-13 20:51:39,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:51:39,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:39,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:51:39,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:51:39,164 INFO L87 Difference]: Start difference. First operand 2731 states and 11595 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-07-13 20:51:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:39,289 INFO L93 Difference]: Finished difference Result 5435 states and 21973 transitions. [2021-07-13 20:51:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:51:39,290 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:51:39,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:39,302 INFO L225 Difference]: With dead ends: 5435 [2021-07-13 20:51:39,302 INFO L226 Difference]: Without dead ends: 5435 [2021-07-13 20:51:39,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:51:39,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5435 states. [2021-07-13 20:51:39,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5435 to 3753. [2021-07-13 20:51:39,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 4.30863539445629) internal successors, (16166), 3752 states have internal predecessors, (16166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 16166 transitions. [2021-07-13 20:51:39,379 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 16166 transitions. Word has length 23 [2021-07-13 20:51:39,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:39,379 INFO L482 AbstractCegarLoop]: Abstraction has 3753 states and 16166 transitions. [2021-07-13 20:51:39,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-07-13 20:51:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 16166 transitions. [2021-07-13 20:51:39,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:51:39,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:39,386 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:39,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 20:51:39,603 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:39,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:39,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1311709520, now seen corresponding path program 6 times [2021-07-13 20:51:39,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:39,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114356000] [2021-07-13 20:51:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:39,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:39,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114356000] [2021-07-13 20:51:39,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114356000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:39,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435023810] [2021-07-13 20:51:39,617 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 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 [2021-07-13 20:51:39,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:51:39,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:39,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:51:39,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:39,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435023810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:39,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:39,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-07-13 20:51:39,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147790715] [2021-07-13 20:51:39,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:51:39,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:39,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:51:39,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:51:39,697 INFO L87 Difference]: Start difference. First operand 3753 states and 16166 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-07-13 20:51:39,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:39,916 INFO L93 Difference]: Finished difference Result 6635 states and 27289 transitions. [2021-07-13 20:51:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:51:39,917 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:51:39,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:39,931 INFO L225 Difference]: With dead ends: 6635 [2021-07-13 20:51:39,932 INFO L226 Difference]: Without dead ends: 6635 [2021-07-13 20:51:39,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:51:39,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6635 states. [2021-07-13 20:51:40,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6635 to 4003. [2021-07-13 20:51:40,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 4.365817091454272) internal successors, (17472), 4002 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:40,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 17472 transitions. [2021-07-13 20:51:40,024 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 17472 transitions. Word has length 23 [2021-07-13 20:51:40,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:40,024 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 17472 transitions. [2021-07-13 20:51:40,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-07-13 20:51:40,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 17472 transitions. [2021-07-13 20:51:40,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:51:40,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:40,033 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:40,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 20:51:40,250 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:40,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1097839692, now seen corresponding path program 7 times [2021-07-13 20:51:40,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:40,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015118725] [2021-07-13 20:51:40,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:40,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:40,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015118725] [2021-07-13 20:51:40,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015118725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:40,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002319423] [2021-07-13 20:51:40,273 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 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 [2021-07-13 20:51:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:40,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:51:40,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:40,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002319423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:40,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:40,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-07-13 20:51:40,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554850158] [2021-07-13 20:51:40,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:51:40,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:40,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:51:40,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:51:40,409 INFO L87 Difference]: Start difference. First operand 4003 states and 17472 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:40,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:40,600 INFO L93 Difference]: Finished difference Result 8080 states and 33388 transitions. [2021-07-13 20:51:40,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:51:40,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:51:40,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:40,619 INFO L225 Difference]: With dead ends: 8080 [2021-07-13 20:51:40,619 INFO L226 Difference]: Without dead ends: 7806 [2021-07-13 20:51:40,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:51:40,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7806 states. [2021-07-13 20:51:40,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7806 to 5496. [2021-07-13 20:51:40,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5496 states, 5495 states have (on average 4.4049135577798) internal successors, (24205), 5495 states have internal predecessors, (24205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:40,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5496 states to 5496 states and 24205 transitions. [2021-07-13 20:51:40,735 INFO L78 Accepts]: Start accepts. Automaton has 5496 states and 24205 transitions. Word has length 25 [2021-07-13 20:51:40,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:40,735 INFO L482 AbstractCegarLoop]: Abstraction has 5496 states and 24205 transitions. [2021-07-13 20:51:40,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:40,735 INFO L276 IsEmpty]: Start isEmpty. Operand 5496 states and 24205 transitions. [2021-07-13 20:51:40,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:51:40,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:40,747 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:40,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 20:51:40,961 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:40,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:40,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1886925744, now seen corresponding path program 4 times [2021-07-13 20:51:40,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:40,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885656438] [2021-07-13 20:51:40,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:41,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:41,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885656438] [2021-07-13 20:51:41,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885656438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:41,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107576061] [2021-07-13 20:51:41,038 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 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 [2021-07-13 20:51:41,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:51:41,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:41,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:51:41,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:41,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107576061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:41,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:41,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:51:41,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535748719] [2021-07-13 20:51:41,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:51:41,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:41,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:51:41,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:51:41,131 INFO L87 Difference]: Start difference. First operand 5496 states and 24205 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:41,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:41,273 INFO L93 Difference]: Finished difference Result 7686 states and 32613 transitions. [2021-07-13 20:51:41,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:51:41,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:51:41,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:41,292 INFO L225 Difference]: With dead ends: 7686 [2021-07-13 20:51:41,292 INFO L226 Difference]: Without dead ends: 7610 [2021-07-13 20:51:41,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:51:41,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7610 states. [2021-07-13 20:51:41,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7610 to 5750. [2021-07-13 20:51:41,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5750 states, 5749 states have (on average 4.412071664637328) internal successors, (25365), 5749 states have internal predecessors, (25365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5750 states to 5750 states and 25365 transitions. [2021-07-13 20:51:41,411 INFO L78 Accepts]: Start accepts. Automaton has 5750 states and 25365 transitions. Word has length 25 [2021-07-13 20:51:41,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:41,411 INFO L482 AbstractCegarLoop]: Abstraction has 5750 states and 25365 transitions. [2021-07-13 20:51:41,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:41,411 INFO L276 IsEmpty]: Start isEmpty. Operand 5750 states and 25365 transitions. [2021-07-13 20:51:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:51:41,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:41,423 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:41,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:41,623 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:41,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:41,624 INFO L82 PathProgramCache]: Analyzing trace with hash -787804976, now seen corresponding path program 1 times [2021-07-13 20:51:41,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:41,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486186004] [2021-07-13 20:51:41,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:41,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:41,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:41,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486186004] [2021-07-13 20:51:41,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486186004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:41,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997907523] [2021-07-13 20:51:41,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-13 20:51:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:41,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:51:41,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:41,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997907523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:41,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:41,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-13 20:51:41,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23247559] [2021-07-13 20:51:41,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:51:41,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:41,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:51:41,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:51:41,759 INFO L87 Difference]: Start difference. First operand 5750 states and 25365 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-07-13 20:51:42,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:42,116 INFO L93 Difference]: Finished difference Result 13992 states and 58011 transitions. [2021-07-13 20:51:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:51:42,117 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-07-13 20:51:42,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:42,153 INFO L225 Difference]: With dead ends: 13992 [2021-07-13 20:51:42,153 INFO L226 Difference]: Without dead ends: 13926 [2021-07-13 20:51:42,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:51:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13926 states. [2021-07-13 20:51:42,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13926 to 7249. [2021-07-13 20:51:42,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7249 states, 7248 states have (on average 4.467301324503311) internal successors, (32379), 7248 states have internal predecessors, (32379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 32379 transitions. [2021-07-13 20:51:42,399 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 32379 transitions. Word has length 25 [2021-07-13 20:51:42,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:42,399 INFO L482 AbstractCegarLoop]: Abstraction has 7249 states and 32379 transitions. [2021-07-13 20:51:42,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-07-13 20:51:42,399 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 32379 transitions. [2021-07-13 20:51:42,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:51:42,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:42,416 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:42,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 20:51:42,616 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:42,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:42,617 INFO L82 PathProgramCache]: Analyzing trace with hash -717911412, now seen corresponding path program 2 times [2021-07-13 20:51:42,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:42,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899153571] [2021-07-13 20:51:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:42,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:42,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899153571] [2021-07-13 20:51:42,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899153571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:42,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538268674] [2021-07-13 20:51:42,637 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 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 [2021-07-13 20:51:42,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:51:42,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:42,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:51:42,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:42,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538268674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:42,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:42,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-13 20:51:42,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791424573] [2021-07-13 20:51:42,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:51:42,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:42,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:51:42,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:51:42,751 INFO L87 Difference]: Start difference. First operand 7249 states and 32379 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-07-13 20:51:43,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:43,246 INFO L93 Difference]: Finished difference Result 12594 states and 53597 transitions. [2021-07-13 20:51:43,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:51:43,246 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-07-13 20:51:43,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:43,284 INFO L225 Difference]: With dead ends: 12594 [2021-07-13 20:51:43,284 INFO L226 Difference]: Without dead ends: 12594 [2021-07-13 20:51:43,285 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:51:43,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12594 states. [2021-07-13 20:51:43,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12594 to 8788. [2021-07-13 20:51:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8788 states, 8787 states have (on average 4.496073745305565) internal successors, (39507), 8787 states have internal predecessors, (39507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:43,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8788 states to 8788 states and 39507 transitions. [2021-07-13 20:51:43,529 INFO L78 Accepts]: Start accepts. Automaton has 8788 states and 39507 transitions. Word has length 25 [2021-07-13 20:51:43,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:43,529 INFO L482 AbstractCegarLoop]: Abstraction has 8788 states and 39507 transitions. [2021-07-13 20:51:43,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-07-13 20:51:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 8788 states and 39507 transitions. [2021-07-13 20:51:43,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:51:43,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:43,549 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:43,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:43,749 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:43,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:43,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1056551404, now seen corresponding path program 3 times [2021-07-13 20:51:43,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:43,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276104332] [2021-07-13 20:51:43,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:43,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:43,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276104332] [2021-07-13 20:51:43,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276104332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:43,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244639406] [2021-07-13 20:51:43,843 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 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 [2021-07-13 20:51:43,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:51:43,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:43,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:51:43,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:43,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244639406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:43,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:43,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:51:43,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124932881] [2021-07-13 20:51:43,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:51:43,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:43,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:51:43,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:51:43,982 INFO L87 Difference]: Start difference. First operand 8788 states and 39507 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:44,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:44,696 INFO L93 Difference]: Finished difference Result 29971 states and 129329 transitions. [2021-07-13 20:51:44,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:51:44,697 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:51:44,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:44,792 INFO L225 Difference]: With dead ends: 29971 [2021-07-13 20:51:44,792 INFO L226 Difference]: Without dead ends: 29848 [2021-07-13 20:51:44,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 286.1ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:51:44,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29848 states. [2021-07-13 20:51:45,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29848 to 14478. [2021-07-13 20:51:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14478 states, 14477 states have (on average 4.563859915728397) internal successors, (66071), 14477 states have internal predecessors, (66071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:45,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14478 states to 14478 states and 66071 transitions. [2021-07-13 20:51:45,335 INFO L78 Accepts]: Start accepts. Automaton has 14478 states and 66071 transitions. Word has length 25 [2021-07-13 20:51:45,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:45,336 INFO L482 AbstractCegarLoop]: Abstraction has 14478 states and 66071 transitions. [2021-07-13 20:51:45,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:45,336 INFO L276 IsEmpty]: Start isEmpty. Operand 14478 states and 66071 transitions. [2021-07-13 20:51:45,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:51:45,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:45,370 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:45,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 20:51:45,577 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:45,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:45,577 INFO L82 PathProgramCache]: Analyzing trace with hash -839523414, now seen corresponding path program 4 times [2021-07-13 20:51:45,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:45,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139005725] [2021-07-13 20:51:45,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:45,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:45,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139005725] [2021-07-13 20:51:45,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139005725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:45,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290479086] [2021-07-13 20:51:45,621 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 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 [2021-07-13 20:51:45,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:51:45,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:45,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:51:45,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:45,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290479086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:45,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:45,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-07-13 20:51:45,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066699411] [2021-07-13 20:51:45,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:51:45,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:45,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:51:45,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:51:45,814 INFO L87 Difference]: Start difference. First operand 14478 states and 66071 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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) [2021-07-13 20:51:46,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:46,392 INFO L93 Difference]: Finished difference Result 31001 states and 134975 transitions. [2021-07-13 20:51:46,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:51:46,392 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 25 [2021-07-13 20:51:46,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:46,525 INFO L225 Difference]: With dead ends: 31001 [2021-07-13 20:51:46,526 INFO L226 Difference]: Without dead ends: 30851 [2021-07-13 20:51:46,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:51:46,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30851 states. [2021-07-13 20:51:47,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30851 to 21508. [2021-07-13 20:51:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21508 states, 21507 states have (on average 4.549309527130702) internal successors, (97842), 21507 states have internal predecessors, (97842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:47,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21508 states to 21508 states and 97842 transitions. [2021-07-13 20:51:47,285 INFO L78 Accepts]: Start accepts. Automaton has 21508 states and 97842 transitions. Word has length 25 [2021-07-13 20:51:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:47,285 INFO L482 AbstractCegarLoop]: Abstraction has 21508 states and 97842 transitions. [2021-07-13 20:51:47,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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) [2021-07-13 20:51:47,285 INFO L276 IsEmpty]: Start isEmpty. Operand 21508 states and 97842 transitions. [2021-07-13 20:51:47,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:51:47,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:47,331 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:47,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:47,532 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:47,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:47,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1905173876, now seen corresponding path program 5 times [2021-07-13 20:51:47,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:47,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645111172] [2021-07-13 20:51:47,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:47,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:47,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645111172] [2021-07-13 20:51:47,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645111172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:47,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627949080] [2021-07-13 20:51:47,674 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 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 [2021-07-13 20:51:47,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:51:47,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:47,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:51:47,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:47,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627949080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:47,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:47,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:51:47,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100086675] [2021-07-13 20:51:47,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:51:47,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:47,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:51:47,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:51:47,806 INFO L87 Difference]: Start difference. First operand 21508 states and 97842 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2021-07-13 20:51:48,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:48,208 INFO L93 Difference]: Finished difference Result 27651 states and 123756 transitions. [2021-07-13 20:51:48,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:51:48,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:51:48,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:48,300 INFO L225 Difference]: With dead ends: 27651 [2021-07-13 20:51:48,300 INFO L226 Difference]: Without dead ends: 27523 [2021-07-13 20:51:48,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:51:48,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27523 states. [2021-07-13 20:51:48,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27523 to 21550. [2021-07-13 20:51:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21550 states, 21549 states have (on average 4.550559190681702) internal successors, (98060), 21549 states have internal predecessors, (98060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21550 states to 21550 states and 98060 transitions. [2021-07-13 20:51:49,044 INFO L78 Accepts]: Start accepts. Automaton has 21550 states and 98060 transitions. Word has length 25 [2021-07-13 20:51:49,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:49,044 INFO L482 AbstractCegarLoop]: Abstraction has 21550 states and 98060 transitions. [2021-07-13 20:51:49,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2021-07-13 20:51:49,044 INFO L276 IsEmpty]: Start isEmpty. Operand 21550 states and 98060 transitions. [2021-07-13 20:51:49,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:51:49,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:49,118 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:49,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 20:51:49,319 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:49,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:49,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2009638882, now seen corresponding path program 6 times [2021-07-13 20:51:49,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:49,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048258318] [2021-07-13 20:51:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:49,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:49,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048258318] [2021-07-13 20:51:49,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048258318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:49,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522001046] [2021-07-13 20:51:49,378 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 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 [2021-07-13 20:51:49,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:51:49,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:49,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:51:49,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:49,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522001046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:49,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:49,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:51:49,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991977976] [2021-07-13 20:51:49,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:51:49,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:49,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:51:49,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:51:49,581 INFO L87 Difference]: Start difference. First operand 21550 states and 98060 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:49,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:49,911 INFO L93 Difference]: Finished difference Result 22500 states and 101338 transitions. [2021-07-13 20:51:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:51:49,912 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:51:49,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:49,987 INFO L225 Difference]: With dead ends: 22500 [2021-07-13 20:51:49,987 INFO L226 Difference]: Without dead ends: 22316 [2021-07-13 20:51:49,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:51:50,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22316 states. [2021-07-13 20:51:50,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22316 to 21544. [2021-07-13 20:51:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21544 states, 21543 states have (on average 4.5494592210926985) internal successors, (98009), 21543 states have internal predecessors, (98009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:50,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21544 states to 21544 states and 98009 transitions. [2021-07-13 20:51:50,656 INFO L78 Accepts]: Start accepts. Automaton has 21544 states and 98009 transitions. Word has length 25 [2021-07-13 20:51:50,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:50,656 INFO L482 AbstractCegarLoop]: Abstraction has 21544 states and 98009 transitions. [2021-07-13 20:51:50,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:50,656 INFO L276 IsEmpty]: Start isEmpty. Operand 21544 states and 98009 transitions. [2021-07-13 20:51:50,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:51:50,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:50,699 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:50,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 20:51:50,913 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:50,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:50,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1604748080, now seen corresponding path program 7 times [2021-07-13 20:51:50,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:50,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646467314] [2021-07-13 20:51:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:50,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:50,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646467314] [2021-07-13 20:51:50,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646467314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:50,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443378398] [2021-07-13 20:51:50,957 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 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 [2021-07-13 20:51:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:50,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:51:50,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:51,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443378398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:51,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:51,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-07-13 20:51:51,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932212822] [2021-07-13 20:51:51,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:51:51,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:51,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:51:51,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:51:51,064 INFO L87 Difference]: Start difference. First operand 21544 states and 98009 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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) [2021-07-13 20:51:51,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:51,699 INFO L93 Difference]: Finished difference Result 37571 states and 165395 transitions. [2021-07-13 20:51:51,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:51:51,700 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 25 [2021-07-13 20:51:51,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:51,846 INFO L225 Difference]: With dead ends: 37571 [2021-07-13 20:51:51,846 INFO L226 Difference]: Without dead ends: 37406 [2021-07-13 20:51:51,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 174.6ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:51:51,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37406 states. [2021-07-13 20:51:52,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37406 to 25632. [2021-07-13 20:51:52,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25632 states, 25631 states have (on average 4.59131520424486) internal successors, (117680), 25631 states have internal predecessors, (117680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:52,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25632 states to 25632 states and 117680 transitions. [2021-07-13 20:51:52,796 INFO L78 Accepts]: Start accepts. Automaton has 25632 states and 117680 transitions. Word has length 25 [2021-07-13 20:51:52,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:52,796 INFO L482 AbstractCegarLoop]: Abstraction has 25632 states and 117680 transitions. [2021-07-13 20:51:52,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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) [2021-07-13 20:51:52,796 INFO L276 IsEmpty]: Start isEmpty. Operand 25632 states and 117680 transitions. [2021-07-13 20:51:52,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:51:52,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:52,859 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:53,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 20:51:53,060 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:53,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:53,060 INFO L82 PathProgramCache]: Analyzing trace with hash 544048456, now seen corresponding path program 8 times [2021-07-13 20:51:53,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:53,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755256285] [2021-07-13 20:51:53,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:53,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:53,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755256285] [2021-07-13 20:51:53,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755256285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:53,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268701390] [2021-07-13 20:51:53,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:51:53,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:51:53,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:53,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:51:53,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:53,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:53,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268701390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:53,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:53,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:51:53,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340050874] [2021-07-13 20:51:53,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:51:53,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:53,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:51:53,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:51:53,378 INFO L87 Difference]: Start difference. First operand 25632 states and 117680 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-07-13 20:51:53,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:53,691 INFO L93 Difference]: Finished difference Result 26558 states and 120874 transitions. [2021-07-13 20:51:53,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:51:53,692 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 25 [2021-07-13 20:51:53,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:53,928 INFO L225 Difference]: With dead ends: 26558 [2021-07-13 20:51:53,928 INFO L226 Difference]: Without dead ends: 26388 [2021-07-13 20:51:53,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:51:53,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26388 states. [2021-07-13 20:51:54,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26388 to 25652. [2021-07-13 20:51:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25652 states, 25651 states have (on average 4.589294764336673) internal successors, (117720), 25651 states have internal predecessors, (117720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25652 states to 25652 states and 117720 transitions. [2021-07-13 20:51:54,568 INFO L78 Accepts]: Start accepts. Automaton has 25652 states and 117720 transitions. Word has length 25 [2021-07-13 20:51:54,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:54,568 INFO L482 AbstractCegarLoop]: Abstraction has 25652 states and 117720 transitions. [2021-07-13 20:51:54,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-07-13 20:51:54,568 INFO L276 IsEmpty]: Start isEmpty. Operand 25652 states and 117720 transitions. [2021-07-13 20:51:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:51:54,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:54,641 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:54,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:54,842 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:54,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:54,842 INFO L82 PathProgramCache]: Analyzing trace with hash -792544304, now seen corresponding path program 1 times [2021-07-13 20:51:54,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:54,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144946215] [2021-07-13 20:51:54,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:54,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:54,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144946215] [2021-07-13 20:51:54,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144946215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:54,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718477113] [2021-07-13 20:51:54,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-13 20:51:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:54,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:51:54,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:54,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718477113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:54,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:54,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-07-13 20:51:54,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77780489] [2021-07-13 20:51:54,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:51:54,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:54,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:51:54,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:51:54,945 INFO L87 Difference]: Start difference. First operand 25652 states and 117720 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2021-07-13 20:51:55,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:55,422 INFO L93 Difference]: Finished difference Result 28634 states and 129447 transitions. [2021-07-13 20:51:55,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:51:55,422 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 25 [2021-07-13 20:51:55,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:55,520 INFO L225 Difference]: With dead ends: 28634 [2021-07-13 20:51:55,520 INFO L226 Difference]: Without dead ends: 28616 [2021-07-13 20:51:55,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:51:55,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28616 states. [2021-07-13 20:51:56,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28616 to 26082. [2021-07-13 20:51:56,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26082 states, 26081 states have (on average 4.586288869291821) internal successors, (119615), 26081 states have internal predecessors, (119615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26082 states to 26082 states and 119615 transitions. [2021-07-13 20:51:56,337 INFO L78 Accepts]: Start accepts. Automaton has 26082 states and 119615 transitions. Word has length 25 [2021-07-13 20:51:56,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:56,338 INFO L482 AbstractCegarLoop]: Abstraction has 26082 states and 119615 transitions. [2021-07-13 20:51:56,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2021-07-13 20:51:56,338 INFO L276 IsEmpty]: Start isEmpty. Operand 26082 states and 119615 transitions. [2021-07-13 20:51:56,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:51:56,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:56,399 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:56,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 20:51:56,600 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:56,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:56,600 INFO L82 PathProgramCache]: Analyzing trace with hash -341810224, now seen corresponding path program 2 times [2021-07-13 20:51:56,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:56,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125304787] [2021-07-13 20:51:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:56,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:56,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:56,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125304787] [2021-07-13 20:51:56,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125304787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:56,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747110402] [2021-07-13 20:51:56,621 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 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 [2021-07-13 20:51:56,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:51:56,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:56,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:51:56,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:56,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747110402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:56,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:56,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-07-13 20:51:56,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342132490] [2021-07-13 20:51:56,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:51:56,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:56,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:51:56,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:51:56,691 INFO L87 Difference]: Start difference. First operand 26082 states and 119615 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:57,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:57,131 INFO L93 Difference]: Finished difference Result 30645 states and 137873 transitions. [2021-07-13 20:51:57,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:51:57,132 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:51:57,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:57,250 INFO L225 Difference]: With dead ends: 30645 [2021-07-13 20:51:57,251 INFO L226 Difference]: Without dead ends: 30645 [2021-07-13 20:51:57,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:51:57,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30645 states. [2021-07-13 20:51:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30645 to 25908. [2021-07-13 20:51:57,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25908 states, 25907 states have (on average 4.584243640714865) internal successors, (118764), 25907 states have internal predecessors, (118764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:57,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25908 states to 25908 states and 118764 transitions. [2021-07-13 20:51:57,995 INFO L78 Accepts]: Start accepts. Automaton has 25908 states and 118764 transitions. Word has length 25 [2021-07-13 20:51:57,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:57,995 INFO L482 AbstractCegarLoop]: Abstraction has 25908 states and 118764 transitions. [2021-07-13 20:51:57,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:57,996 INFO L276 IsEmpty]: Start isEmpty. Operand 25908 states and 118764 transitions. [2021-07-13 20:51:58,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:51:58,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:58,062 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:58,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 20:51:58,263 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:58,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:58,263 INFO L82 PathProgramCache]: Analyzing trace with hash 35028364, now seen corresponding path program 3 times [2021-07-13 20:51:58,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:58,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045150622] [2021-07-13 20:51:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:58,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:58,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045150622] [2021-07-13 20:51:58,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045150622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:58,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174184006] [2021-07-13 20:51:58,290 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 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 [2021-07-13 20:51:58,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:51:58,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:58,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:51:58,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:58,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174184006] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:51:58,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:51:58,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-07-13 20:51:58,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911733996] [2021-07-13 20:51:58,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:51:58,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:58,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:51:58,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:51:58,373 INFO L87 Difference]: Start difference. First operand 25908 states and 118764 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:58,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:58,886 INFO L93 Difference]: Finished difference Result 33932 states and 151310 transitions. [2021-07-13 20:51:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:51:58,888 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:51:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:59,001 INFO L225 Difference]: With dead ends: 33932 [2021-07-13 20:51:59,001 INFO L226 Difference]: Without dead ends: 33850 [2021-07-13 20:51:59,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:51:59,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33850 states. [2021-07-13 20:51:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33850 to 27223. [2021-07-13 20:51:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27223 states, 27222 states have (on average 4.581074131217398) internal successors, (124706), 27222 states have internal predecessors, (124706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:59,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27223 states to 27223 states and 124706 transitions. [2021-07-13 20:51:59,892 INFO L78 Accepts]: Start accepts. Automaton has 27223 states and 124706 transitions. Word has length 25 [2021-07-13 20:51:59,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:59,892 INFO L482 AbstractCegarLoop]: Abstraction has 27223 states and 124706 transitions. [2021-07-13 20:51:59,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:59,892 INFO L276 IsEmpty]: Start isEmpty. Operand 27223 states and 124706 transitions. [2021-07-13 20:51:59,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:51:59,961 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:59,961 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:00,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:00,162 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:00,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:00,162 INFO L82 PathProgramCache]: Analyzing trace with hash 137417170, now seen corresponding path program 5 times [2021-07-13 20:52:00,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:00,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807792955] [2021-07-13 20:52:00,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:00,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:00,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807792955] [2021-07-13 20:52:00,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807792955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:00,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778775485] [2021-07-13 20:52:00,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:52:00,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:52:00,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:00,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:52:00,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:00,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778775485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:00,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:00,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:52:00,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366629726] [2021-07-13 20:52:00,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:52:00,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:00,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:52:00,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:52:00,276 INFO L87 Difference]: Start difference. First operand 27223 states and 124706 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:00,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:00,705 INFO L93 Difference]: Finished difference Result 29638 states and 134233 transitions. [2021-07-13 20:52:00,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:52:00,705 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:52:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:00,807 INFO L225 Difference]: With dead ends: 29638 [2021-07-13 20:52:00,807 INFO L226 Difference]: Without dead ends: 29562 [2021-07-13 20:52:00,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:52:00,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29562 states. [2021-07-13 20:52:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29562 to 27293. [2021-07-13 20:52:01,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27293 states, 27292 states have (on average 4.584017294445259) internal successors, (125107), 27292 states have internal predecessors, (125107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:01,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27293 states to 27293 states and 125107 transitions. [2021-07-13 20:52:01,507 INFO L78 Accepts]: Start accepts. Automaton has 27293 states and 125107 transitions. Word has length 25 [2021-07-13 20:52:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:01,507 INFO L482 AbstractCegarLoop]: Abstraction has 27293 states and 125107 transitions. [2021-07-13 20:52:01,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:01,507 INFO L276 IsEmpty]: Start isEmpty. Operand 27293 states and 125107 transitions. [2021-07-13 20:52:01,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:52:01,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:01,572 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:01,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-13 20:52:01,773 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:01,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:01,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1704182322, now seen corresponding path program 6 times [2021-07-13 20:52:01,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:01,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081960064] [2021-07-13 20:52:01,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:01,992 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-07-13 20:52:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:02,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:02,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081960064] [2021-07-13 20:52:02,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081960064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:02,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145578746] [2021-07-13 20:52:02,012 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:52:02,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:52:02,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:02,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:52:02,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:02,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145578746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:02,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:02,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:52:02,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164798941] [2021-07-13 20:52:02,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:52:02,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:02,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:52:02,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:52:02,086 INFO L87 Difference]: Start difference. First operand 27293 states and 125107 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:02,378 INFO L93 Difference]: Finished difference Result 29552 states and 134049 transitions. [2021-07-13 20:52:02,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:52:02,378 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:52:02,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:02,498 INFO L225 Difference]: With dead ends: 29552 [2021-07-13 20:52:02,499 INFO L226 Difference]: Without dead ends: 29476 [2021-07-13 20:52:02,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:52:02,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29476 states. [2021-07-13 20:52:03,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29476 to 27436. [2021-07-13 20:52:03,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27436 states, 27435 states have (on average 4.586477127756515) internal successors, (125830), 27435 states have internal predecessors, (125830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:03,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27436 states to 27436 states and 125830 transitions. [2021-07-13 20:52:03,563 INFO L78 Accepts]: Start accepts. Automaton has 27436 states and 125830 transitions. Word has length 25 [2021-07-13 20:52:03,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:03,563 INFO L482 AbstractCegarLoop]: Abstraction has 27436 states and 125830 transitions. [2021-07-13 20:52:03,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:03,564 INFO L276 IsEmpty]: Start isEmpty. Operand 27436 states and 125830 transitions. [2021-07-13 20:52:03,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:52:03,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:03,626 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:03,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:03,827 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:03,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:03,827 INFO L82 PathProgramCache]: Analyzing trace with hash -605061554, now seen corresponding path program 9 times [2021-07-13 20:52:03,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:03,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705911173] [2021-07-13 20:52:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:03,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:03,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705911173] [2021-07-13 20:52:03,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705911173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:03,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690661982] [2021-07-13 20:52:03,848 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 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 [2021-07-13 20:52:03,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:52:03,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:03,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:52:03,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:03,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690661982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:03,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:03,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-13 20:52:03,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102442347] [2021-07-13 20:52:03,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:52:03,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:03,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:52:03,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:52:03,935 INFO L87 Difference]: Start difference. First operand 27436 states and 125830 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-07-13 20:52:04,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:04,666 INFO L93 Difference]: Finished difference Result 58244 states and 263402 transitions. [2021-07-13 20:52:04,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:52:04,667 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-07-13 20:52:04,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:04,909 INFO L225 Difference]: With dead ends: 58244 [2021-07-13 20:52:04,910 INFO L226 Difference]: Without dead ends: 58083 [2021-07-13 20:52:04,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:52:04,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58083 states. [2021-07-13 20:52:06,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58083 to 50808. [2021-07-13 20:52:06,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50808 states, 50807 states have (on average 4.5649615210502485) internal successors, (231932), 50807 states have internal predecessors, (231932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50808 states to 50808 states and 231932 transitions. [2021-07-13 20:52:06,768 INFO L78 Accepts]: Start accepts. Automaton has 50808 states and 231932 transitions. Word has length 25 [2021-07-13 20:52:06,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:06,768 INFO L482 AbstractCegarLoop]: Abstraction has 50808 states and 231932 transitions. [2021-07-13 20:52:06,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-07-13 20:52:06,768 INFO L276 IsEmpty]: Start isEmpty. Operand 50808 states and 231932 transitions. [2021-07-13 20:52:06,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:52:06,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:06,902 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:07,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-13 20:52:07,103 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:07,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:07,103 INFO L82 PathProgramCache]: Analyzing trace with hash -535167990, now seen corresponding path program 10 times [2021-07-13 20:52:07,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:07,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684701244] [2021-07-13 20:52:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:07,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:07,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684701244] [2021-07-13 20:52:07,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684701244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:07,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010229662] [2021-07-13 20:52:07,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:52:07,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:52:07,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:07,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:52:07,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:07,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010229662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:07,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:07,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-13 20:52:07,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904882778] [2021-07-13 20:52:07,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:52:07,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:07,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:52:07,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:52:07,465 INFO L87 Difference]: Start difference. First operand 50808 states and 231932 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-07-13 20:52:08,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:08,557 INFO L93 Difference]: Finished difference Result 83779 states and 378490 transitions. [2021-07-13 20:52:08,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:52:08,557 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-07-13 20:52:08,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:08,939 INFO L225 Difference]: With dead ends: 83779 [2021-07-13 20:52:08,939 INFO L226 Difference]: Without dead ends: 83779 [2021-07-13 20:52:08,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 392.1ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:52:09,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83779 states. [2021-07-13 20:52:11,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83779 to 72653. [2021-07-13 20:52:11,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72653 states, 72652 states have (on average 4.592110334195893) internal successors, (333626), 72652 states have internal predecessors, (333626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:11,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72653 states to 72653 states and 333626 transitions. [2021-07-13 20:52:11,628 INFO L78 Accepts]: Start accepts. Automaton has 72653 states and 333626 transitions. Word has length 25 [2021-07-13 20:52:11,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:11,628 INFO L482 AbstractCegarLoop]: Abstraction has 72653 states and 333626 transitions. [2021-07-13 20:52:11,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-07-13 20:52:11,628 INFO L276 IsEmpty]: Start isEmpty. Operand 72653 states and 333626 transitions. [2021-07-13 20:52:12,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:52:12,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:12,127 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:12,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 20:52:12,328 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:12,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:12,328 INFO L82 PathProgramCache]: Analyzing trace with hash -2017642098, now seen corresponding path program 7 times [2021-07-13 20:52:12,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:12,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685059676] [2021-07-13 20:52:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:12,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:12,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685059676] [2021-07-13 20:52:12,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685059676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:12,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518777818] [2021-07-13 20:52:12,395 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 [2021-07-13 20:52:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:12,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:52:12,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:12,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518777818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:12,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:12,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:52:12,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31864846] [2021-07-13 20:52:12,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:52:12,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:12,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:52:12,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:52:12,462 INFO L87 Difference]: Start difference. First operand 72653 states and 333626 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:13,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:13,291 INFO L93 Difference]: Finished difference Result 74099 states and 339316 transitions. [2021-07-13 20:52:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:52:13,291 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:52:13,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:13,671 INFO L225 Difference]: With dead ends: 74099 [2021-07-13 20:52:13,672 INFO L226 Difference]: Without dead ends: 74023 [2021-07-13 20:52:13,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:52:13,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74023 states. [2021-07-13 20:52:15,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74023 to 72711. [2021-07-13 20:52:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72711 states, 72710 states have (on average 4.592366937147572) internal successors, (333911), 72710 states have internal predecessors, (333911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:16,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72711 states to 72711 states and 333911 transitions. [2021-07-13 20:52:16,132 INFO L78 Accepts]: Start accepts. Automaton has 72711 states and 333911 transitions. Word has length 25 [2021-07-13 20:52:16,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:16,132 INFO L482 AbstractCegarLoop]: Abstraction has 72711 states and 333911 transitions. [2021-07-13 20:52:16,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:16,132 INFO L276 IsEmpty]: Start isEmpty. Operand 72711 states and 333911 transitions. [2021-07-13 20:52:16,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:52:16,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:16,357 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:16,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 20:52:16,558 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:16,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:16,558 INFO L82 PathProgramCache]: Analyzing trace with hash -660900726, now seen corresponding path program 8 times [2021-07-13 20:52:16,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:16,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677761921] [2021-07-13 20:52:16,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:52:16,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:16,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677761921] [2021-07-13 20:52:16,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677761921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:16,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562203344] [2021-07-13 20:52:16,617 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 [2021-07-13 20:52:16,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:52:16,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:16,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:52:16,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:52:16,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562203344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:16,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:16,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:52:16,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570796426] [2021-07-13 20:52:16,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:52:16,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:16,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:52:16,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:52:16,689 INFO L87 Difference]: Start difference. First operand 72711 states and 333911 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:17,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:17,537 INFO L93 Difference]: Finished difference Result 73874 states and 338535 transitions. [2021-07-13 20:52:17,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:52:17,537 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:52:17,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:17,903 INFO L225 Difference]: With dead ends: 73874 [2021-07-13 20:52:17,903 INFO L226 Difference]: Without dead ends: 73798 [2021-07-13 20:52:17,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:52:17,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73798 states. [2021-07-13 20:52:19,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73798 to 72769. [2021-07-13 20:52:19,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72769 states, 72768 states have (on average 4.592650615655233) internal successors, (334198), 72768 states have internal predecessors, (334198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72769 states to 72769 states and 334198 transitions. [2021-07-13 20:52:20,538 INFO L78 Accepts]: Start accepts. Automaton has 72769 states and 334198 transitions. Word has length 25 [2021-07-13 20:52:20,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:20,538 INFO L482 AbstractCegarLoop]: Abstraction has 72769 states and 334198 transitions. [2021-07-13 20:52:20,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:20,538 INFO L276 IsEmpty]: Start isEmpty. Operand 72769 states and 334198 transitions. [2021-07-13 20:52:21,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:52:21,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:21,012 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:21,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 20:52:21,228 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:21,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:21,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2072982634, now seen corresponding path program 11 times [2021-07-13 20:52:21,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:21,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473779800] [2021-07-13 20:52:21,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:21,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:21,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473779800] [2021-07-13 20:52:21,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473779800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:21,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007302330] [2021-07-13 20:52:21,288 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 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 [2021-07-13 20:52:21,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:52:21,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:21,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:52:21,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:21,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007302330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:21,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:21,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 20:52:21,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832780644] [2021-07-13 20:52:21,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:52:21,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:21,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:52:21,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:52:21,406 INFO L87 Difference]: Start difference. First operand 72769 states and 334198 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-07-13 20:52:22,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:22,838 INFO L93 Difference]: Finished difference Result 113780 states and 518908 transitions. [2021-07-13 20:52:22,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:52:22,839 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 25 [2021-07-13 20:52:22,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:23,771 INFO L225 Difference]: With dead ends: 113780 [2021-07-13 20:52:23,771 INFO L226 Difference]: Without dead ends: 113660 [2021-07-13 20:52:23,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:52:23,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113660 states. [2021-07-13 20:52:26,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113660 to 97354. [2021-07-13 20:52:26,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97354 states, 97353 states have (on average 4.601532567049809) internal successors, (447973), 97353 states have internal predecessors, (447973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97354 states to 97354 states and 447973 transitions. [2021-07-13 20:52:27,672 INFO L78 Accepts]: Start accepts. Automaton has 97354 states and 447973 transitions. Word has length 25 [2021-07-13 20:52:27,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:27,672 INFO L482 AbstractCegarLoop]: Abstraction has 97354 states and 447973 transitions. [2021-07-13 20:52:27,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-07-13 20:52:27,672 INFO L276 IsEmpty]: Start isEmpty. Operand 97354 states and 447973 transitions. [2021-07-13 20:52:27,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:52:27,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:27,915 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:28,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:28,116 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:28,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:28,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1816187858, now seen corresponding path program 12 times [2021-07-13 20:52:28,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:28,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361657384] [2021-07-13 20:52:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:28,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:28,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361657384] [2021-07-13 20:52:28,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361657384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:28,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040191017] [2021-07-13 20:52:28,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:52:28,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:52:28,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:28,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:52:28,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:28,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040191017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:28,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:28,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:52:28,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708049703] [2021-07-13 20:52:28,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:52:28,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:28,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:52:28,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:52:28,265 INFO L87 Difference]: Start difference. First operand 97354 states and 447973 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-07-13 20:52:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:30,780 INFO L93 Difference]: Finished difference Result 199161 states and 905866 transitions. [2021-07-13 20:52:30,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:52:30,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 25 [2021-07-13 20:52:30,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:32,300 INFO L225 Difference]: With dead ends: 199161 [2021-07-13 20:52:32,300 INFO L226 Difference]: Without dead ends: 199068 [2021-07-13 20:52:32,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:52:32,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199068 states. [2021-07-13 20:52:37,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199068 to 126471. [2021-07-13 20:52:37,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126471 states, 126470 states have (on average 4.598568830552701) internal successors, (581581), 126470 states have internal predecessors, (581581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:38,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126471 states to 126471 states and 581581 transitions. [2021-07-13 20:52:38,691 INFO L78 Accepts]: Start accepts. Automaton has 126471 states and 581581 transitions. Word has length 25 [2021-07-13 20:52:38,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:38,691 INFO L482 AbstractCegarLoop]: Abstraction has 126471 states and 581581 transitions. [2021-07-13 20:52:38,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-07-13 20:52:38,691 INFO L276 IsEmpty]: Start isEmpty. Operand 126471 states and 581581 transitions. [2021-07-13 20:52:39,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:52:39,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:39,450 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:39,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 20:52:39,651 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:39,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:39,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1050269714, now seen corresponding path program 13 times [2021-07-13 20:52:39,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:39,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647555976] [2021-07-13 20:52:39,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:39,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:39,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647555976] [2021-07-13 20:52:39,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647555976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:39,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931645632] [2021-07-13 20:52:39,693 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 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 [2021-07-13 20:52:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:39,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:52:39,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:39,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931645632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:39,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:39,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:52:39,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354508621] [2021-07-13 20:52:39,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:52:39,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:39,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:52:39,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:52:39,814 INFO L87 Difference]: Start difference. First operand 126471 states and 581581 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:42,244 INFO L93 Difference]: Finished difference Result 206475 states and 937233 transitions. [2021-07-13 20:52:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:52:42,244 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:52:42,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:43,852 INFO L225 Difference]: With dead ends: 206475 [2021-07-13 20:52:43,852 INFO L226 Difference]: Without dead ends: 206475 [2021-07-13 20:52:43,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 135.0ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:52:44,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206475 states. [2021-07-13 20:52:49,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206475 to 146245. [2021-07-13 20:52:49,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146245 states, 146244 states have (on average 4.6125037608380515) internal successors, (674551), 146244 states have internal predecessors, (674551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146245 states to 146245 states and 674551 transitions. [2021-07-13 20:52:51,102 INFO L78 Accepts]: Start accepts. Automaton has 146245 states and 674551 transitions. Word has length 25 [2021-07-13 20:52:51,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:51,102 INFO L482 AbstractCegarLoop]: Abstraction has 146245 states and 674551 transitions. [2021-07-13 20:52:51,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:51,102 INFO L276 IsEmpty]: Start isEmpty. Operand 146245 states and 674551 transitions. [2021-07-13 20:52:51,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:52:51,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:51,862 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:52,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:52,063 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:52,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:52,063 INFO L82 PathProgramCache]: Analyzing trace with hash 2033215848, now seen corresponding path program 14 times [2021-07-13 20:52:52,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:52,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79244096] [2021-07-13 20:52:52,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:52,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:52,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:52,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79244096] [2021-07-13 20:52:52,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79244096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:52,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300430830] [2021-07-13 20:52:52,105 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 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 [2021-07-13 20:52:52,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:52:52,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:52,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:52:52,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:52,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300430830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:52,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:52,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-07-13 20:52:52,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087508396] [2021-07-13 20:52:52,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:52:52,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:52,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:52:52,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:52:52,196 INFO L87 Difference]: Start difference. First operand 146245 states and 674551 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-07-13 20:52:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:54,288 INFO L93 Difference]: Finished difference Result 158888 states and 723911 transitions. [2021-07-13 20:52:54,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:52:54,289 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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 25 [2021-07-13 20:52:54,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:55,904 INFO L225 Difference]: With dead ends: 158888 [2021-07-13 20:52:55,905 INFO L226 Difference]: Without dead ends: 158813 [2021-07-13 20:52:55,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:52:56,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158813 states. [2021-07-13 20:53:00,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158813 to 150237. [2021-07-13 20:53:00,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150237 states, 150236 states have (on average 4.599729758513273) internal successors, (691045), 150236 states have internal predecessors, (691045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150237 states to 150237 states and 691045 transitions. [2021-07-13 20:53:02,362 INFO L78 Accepts]: Start accepts. Automaton has 150237 states and 691045 transitions. Word has length 25 [2021-07-13 20:53:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:53:02,363 INFO L482 AbstractCegarLoop]: Abstraction has 150237 states and 691045 transitions. [2021-07-13 20:53:02,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-07-13 20:53:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 150237 states and 691045 transitions. [2021-07-13 20:53:02,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:53:02,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:53:02,761 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:53:02,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:02,977 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:53:02,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:53:02,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1990562746, now seen corresponding path program 15 times [2021-07-13 20:53:02,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:53:02,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155052774] [2021-07-13 20:53:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:53:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:03,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:53:03,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155052774] [2021-07-13 20:53:03,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155052774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:03,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554198298] [2021-07-13 20:53:03,013 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 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 [2021-07-13 20:53:03,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:53:03,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:53:03,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:53:03,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:53:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:03,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554198298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:03,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:53:03,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:53:03,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343165501] [2021-07-13 20:53:03,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:53:03,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:53:03,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:53:03,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:53:03,156 INFO L87 Difference]: Start difference. First operand 150237 states and 691045 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:03,734 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2021-07-13 20:53:06,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:53:06,627 INFO L93 Difference]: Finished difference Result 274279 states and 1232729 transitions. [2021-07-13 20:53:06,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:53:06,627 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:53:06,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:53:08,638 INFO L225 Difference]: With dead ends: 274279 [2021-07-13 20:53:08,639 INFO L226 Difference]: Without dead ends: 274261 [2021-07-13 20:53:08,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 465.0ms TimeCoverageRelationStatistics Valid=256, Invalid=446, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:53:08,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274261 states. [2021-07-13 20:53:14,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274261 to 150288. [2021-07-13 20:53:15,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150288 states, 150287 states have (on average 4.600091824309488) internal successors, (691334), 150287 states have internal predecessors, (691334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:16,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150288 states to 150288 states and 691334 transitions. [2021-07-13 20:53:16,644 INFO L78 Accepts]: Start accepts. Automaton has 150288 states and 691334 transitions. Word has length 25 [2021-07-13 20:53:16,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:53:16,644 INFO L482 AbstractCegarLoop]: Abstraction has 150288 states and 691334 transitions. [2021-07-13 20:53:16,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:16,644 INFO L276 IsEmpty]: Start isEmpty. Operand 150288 states and 691334 transitions. [2021-07-13 20:53:17,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:53:17,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:53:17,046 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:53:17,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 20:53:17,246 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:53:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:53:17,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1538486406, now seen corresponding path program 16 times [2021-07-13 20:53:17,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:53:17,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330593652] [2021-07-13 20:53:17,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:53:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:17,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:53:17,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330593652] [2021-07-13 20:53:17,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330593652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:17,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107117179] [2021-07-13 20:53:17,281 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 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 [2021-07-13 20:53:17,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:53:17,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:53:17,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:53:17,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:53:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:17,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107117179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:17,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:53:17,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:53:17,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240034467] [2021-07-13 20:53:17,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:53:17,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:53:17,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:53:17,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:53:17,415 INFO L87 Difference]: Start difference. First operand 150288 states and 691334 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:20,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:53:20,071 INFO L93 Difference]: Finished difference Result 228605 states and 1039503 transitions. [2021-07-13 20:53:20,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:53:20,071 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:53:20,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:53:21,765 INFO L225 Difference]: With dead ends: 228605 [2021-07-13 20:53:21,765 INFO L226 Difference]: Without dead ends: 228605 [2021-07-13 20:53:21,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:53:22,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228605 states. [2021-07-13 20:53:27,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228605 to 150267. [2021-07-13 20:53:27,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150267 states, 150266 states have (on average 4.600089175195985) internal successors, (691237), 150266 states have internal predecessors, (691237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:29,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150267 states to 150267 states and 691237 transitions. [2021-07-13 20:53:29,368 INFO L78 Accepts]: Start accepts. Automaton has 150267 states and 691237 transitions. Word has length 25 [2021-07-13 20:53:29,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:53:29,369 INFO L482 AbstractCegarLoop]: Abstraction has 150267 states and 691237 transitions. [2021-07-13 20:53:29,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:29,369 INFO L276 IsEmpty]: Start isEmpty. Operand 150267 states and 691237 transitions. [2021-07-13 20:53:30,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:53:30,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:53:30,354 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:53:30,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:30,570 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:53:30,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:53:30,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1939792664, now seen corresponding path program 17 times [2021-07-13 20:53:30,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:53:30,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254728243] [2021-07-13 20:53:30,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:53:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:30,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:53:30,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254728243] [2021-07-13 20:53:30,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254728243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:30,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127339660] [2021-07-13 20:53:30,640 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 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 [2021-07-13 20:53:30,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:53:30,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:53:30,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:53:30,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:53:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:30,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127339660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:30,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:53:30,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:53:30,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682621336] [2021-07-13 20:53:30,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:53:30,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:53:30,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:53:30,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:53:30,832 INFO L87 Difference]: Start difference. First operand 150267 states and 691237 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-07-13 20:53:33,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:53:33,718 INFO L93 Difference]: Finished difference Result 181963 states and 827326 transitions. [2021-07-13 20:53:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:53:33,737 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 25 [2021-07-13 20:53:33,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:53:34,889 INFO L225 Difference]: With dead ends: 181963 [2021-07-13 20:53:34,890 INFO L226 Difference]: Without dead ends: 181963 [2021-07-13 20:53:34,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=205, Invalid=347, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:53:35,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181963 states. [2021-07-13 20:53:40,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181963 to 150263. [2021-07-13 20:53:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150263 states, 150262 states have (on average 4.600091839586855) internal successors, (691219), 150262 states have internal predecessors, (691219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:41,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150263 states to 150263 states and 691219 transitions. [2021-07-13 20:53:41,597 INFO L78 Accepts]: Start accepts. Automaton has 150263 states and 691219 transitions. Word has length 25 [2021-07-13 20:53:41,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:53:41,597 INFO L482 AbstractCegarLoop]: Abstraction has 150263 states and 691219 transitions. [2021-07-13 20:53:41,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-07-13 20:53:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand 150263 states and 691219 transitions. [2021-07-13 20:53:41,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:53:41,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:53:41,993 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:53:42,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-13 20:53:42,194 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:53:42,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:53:42,194 INFO L82 PathProgramCache]: Analyzing trace with hash -186895918, now seen corresponding path program 18 times [2021-07-13 20:53:42,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:53:42,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060615796] [2021-07-13 20:53:42,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:53:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:42,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:53:42,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060615796] [2021-07-13 20:53:42,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060615796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:42,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143711577] [2021-07-13 20:53:42,234 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 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 [2021-07-13 20:53:42,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:53:42,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:53:42,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:53:42,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:53:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:42,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143711577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:42,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:53:42,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-07-13 20:53:42,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677268284] [2021-07-13 20:53:42,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:53:42,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:53:42,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:53:42,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:53:42,327 INFO L87 Difference]: Start difference. First operand 150263 states and 691219 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2021-07-13 20:53:44,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:53:44,573 INFO L93 Difference]: Finished difference Result 192198 states and 881415 transitions. [2021-07-13 20:53:44,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:53:44,574 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:53:44,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:53:45,978 INFO L225 Difference]: With dead ends: 192198 [2021-07-13 20:53:45,978 INFO L226 Difference]: Without dead ends: 192052 [2021-07-13 20:53:45,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:53:46,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192052 states. [2021-07-13 20:53:50,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192052 to 150747. [2021-07-13 20:53:51,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150747 states, 150746 states have (on average 4.600427208682154) internal successors, (693496), 150746 states have internal predecessors, (693496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:52,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150747 states to 150747 states and 693496 transitions. [2021-07-13 20:53:52,766 INFO L78 Accepts]: Start accepts. Automaton has 150747 states and 693496 transitions. Word has length 25 [2021-07-13 20:53:52,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:53:52,766 INFO L482 AbstractCegarLoop]: Abstraction has 150747 states and 693496 transitions. [2021-07-13 20:53:52,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2021-07-13 20:53:52,766 INFO L276 IsEmpty]: Start isEmpty. Operand 150747 states and 693496 transitions. [2021-07-13 20:53:53,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:53:53,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:53:53,741 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:53:53,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:53,941 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:53:53,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:53:53,942 INFO L82 PathProgramCache]: Analyzing trace with hash -567050456, now seen corresponding path program 19 times [2021-07-13 20:53:53,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:53:53,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599010565] [2021-07-13 20:53:53,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:53:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:54,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:53:54,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599010565] [2021-07-13 20:53:54,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599010565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:54,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213699009] [2021-07-13 20:53:54,011 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 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 [2021-07-13 20:53:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:54,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:53:54,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:53:54,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:54,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213699009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:54,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:53:54,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-07-13 20:53:54,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431849771] [2021-07-13 20:53:54,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:53:54,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:53:54,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:53:54,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:53:54,117 INFO L87 Difference]: Start difference. First operand 150747 states and 693496 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:56,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:53:56,151 INFO L93 Difference]: Finished difference Result 151664 states and 696652 transitions. [2021-07-13 20:53:56,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:53:56,152 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:53:56,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:53:57,609 INFO L225 Difference]: With dead ends: 151664 [2021-07-13 20:53:57,609 INFO L226 Difference]: Without dead ends: 151407 [2021-07-13 20:53:57,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:53:57,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151407 states. [2021-07-13 20:54:01,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151407 to 150715. [2021-07-13 20:54:01,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150715 states, 150714 states have (on average 4.600030521384874) internal successors, (693289), 150714 states have internal predecessors, (693289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150715 states to 150715 states and 693289 transitions. [2021-07-13 20:54:03,465 INFO L78 Accepts]: Start accepts. Automaton has 150715 states and 693289 transitions. Word has length 25 [2021-07-13 20:54:03,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:54:03,465 INFO L482 AbstractCegarLoop]: Abstraction has 150715 states and 693289 transitions. [2021-07-13 20:54:03,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:03,465 INFO L276 IsEmpty]: Start isEmpty. Operand 150715 states and 693289 transitions. [2021-07-13 20:54:03,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:54:03,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:54:03,874 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:54:04,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 20:54:04,074 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:54:04,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:54:04,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1169845454, now seen corresponding path program 20 times [2021-07-13 20:54:04,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:54:04,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625348502] [2021-07-13 20:54:04,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:54:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:04,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:54:04,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625348502] [2021-07-13 20:54:04,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625348502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:04,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650292657] [2021-07-13 20:54:04,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:54:04,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:54:04,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:54:04,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:54:04,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:54:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:04,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650292657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:04,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:54:04,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-13 20:54:04,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981980242] [2021-07-13 20:54:04,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:54:04,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:54:04,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:54:04,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:54:04,235 INFO L87 Difference]: Start difference. First operand 150715 states and 693289 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2021-07-13 20:54:06,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:54:06,591 INFO L93 Difference]: Finished difference Result 193192 states and 885923 transitions. [2021-07-13 20:54:06,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:54:06,591 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:54:06,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:54:08,089 INFO L225 Difference]: With dead ends: 193192 [2021-07-13 20:54:08,089 INFO L226 Difference]: Without dead ends: 193064 [2021-07-13 20:54:08,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:54:08,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193064 states. [2021-07-13 20:54:13,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193064 to 150929. [2021-07-13 20:54:13,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150929 states, 150928 states have (on average 4.599756175129864) internal successors, (694232), 150928 states have internal predecessors, (694232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:14,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150929 states to 150929 states and 694232 transitions. [2021-07-13 20:54:14,737 INFO L78 Accepts]: Start accepts. Automaton has 150929 states and 694232 transitions. Word has length 25 [2021-07-13 20:54:14,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:54:14,737 INFO L482 AbstractCegarLoop]: Abstraction has 150929 states and 694232 transitions. [2021-07-13 20:54:14,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2021-07-13 20:54:14,737 INFO L276 IsEmpty]: Start isEmpty. Operand 150929 states and 694232 transitions. [2021-07-13 20:54:15,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:54:15,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:54:15,290 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:54:15,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 20:54:15,505 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:54:15,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:54:15,505 INFO L82 PathProgramCache]: Analyzing trace with hash 919442638, now seen corresponding path program 8 times [2021-07-13 20:54:15,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:54:15,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036377311] [2021-07-13 20:54:15,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:54:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:15,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:54:15,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036377311] [2021-07-13 20:54:15,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036377311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:15,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705458505] [2021-07-13 20:54:15,840 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:54:15,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:54:15,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:15,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:54:15,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:54:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:15,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705458505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:15,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:54:15,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:54:15,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290058585] [2021-07-13 20:54:15,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:54:15,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:54:15,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:54:15,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:54:15,970 INFO L87 Difference]: Start difference. First operand 150929 states and 694232 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-07-13 20:54:18,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:54:18,096 INFO L93 Difference]: Finished difference Result 156612 states and 717259 transitions. [2021-07-13 20:54:18,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:54:18,109 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:54:18,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:54:19,578 INFO L225 Difference]: With dead ends: 156612 [2021-07-13 20:54:19,578 INFO L226 Difference]: Without dead ends: 156525 [2021-07-13 20:54:19,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:54:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156525 states. [2021-07-13 20:54:24,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156525 to 152518. [2021-07-13 20:54:24,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152518 states, 152517 states have (on average 4.600287181101123) internal successors, (701622), 152517 states have internal predecessors, (701622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:26,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152518 states to 152518 states and 701622 transitions. [2021-07-13 20:54:26,081 INFO L78 Accepts]: Start accepts. Automaton has 152518 states and 701622 transitions. Word has length 25 [2021-07-13 20:54:26,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:54:26,081 INFO L482 AbstractCegarLoop]: Abstraction has 152518 states and 701622 transitions. [2021-07-13 20:54:26,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-07-13 20:54:26,081 INFO L276 IsEmpty]: Start isEmpty. Operand 152518 states and 701622 transitions. [2021-07-13 20:54:26,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:54:26,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:54:26,495 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:54:26,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:26,705 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:54:26,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:54:26,706 INFO L82 PathProgramCache]: Analyzing trace with hash 920853582, now seen corresponding path program 4 times [2021-07-13 20:54:26,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:54:26,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955222359] [2021-07-13 20:54:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:54:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:26,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:54:26,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955222359] [2021-07-13 20:54:26,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955222359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:26,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578052855] [2021-07-13 20:54:26,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:54:26,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:54:26,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:54:26,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:54:26,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:54:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:26,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578052855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:26,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:54:26,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:54:26,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633598491] [2021-07-13 20:54:26,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:54:26,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:54:26,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:54:26,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:54:26,807 INFO L87 Difference]: Start difference. First operand 152518 states and 701622 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-07-13 20:54:28,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:54:28,532 INFO L93 Difference]: Finished difference Result 156333 states and 716897 transitions. [2021-07-13 20:54:28,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:54:28,532 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 25 [2021-07-13 20:54:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:54:29,721 INFO L225 Difference]: With dead ends: 156333 [2021-07-13 20:54:29,721 INFO L226 Difference]: Without dead ends: 156315 [2021-07-13 20:54:29,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:54:29,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156315 states. [2021-07-13 20:54:34,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156315 to 152720. [2021-07-13 20:54:34,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152720 states, 152719 states have (on average 4.600062860547803) internal successors, (702517), 152719 states have internal predecessors, (702517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:35,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152720 states to 152720 states and 702517 transitions. [2021-07-13 20:54:35,923 INFO L78 Accepts]: Start accepts. Automaton has 152720 states and 702517 transitions. Word has length 25 [2021-07-13 20:54:35,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:54:35,923 INFO L482 AbstractCegarLoop]: Abstraction has 152720 states and 702517 transitions. [2021-07-13 20:54:35,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-07-13 20:54:35,923 INFO L276 IsEmpty]: Start isEmpty. Operand 152720 states and 702517 transitions. [2021-07-13 20:54:36,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:54:36,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:54:36,815 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:54:37,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-13 20:54:37,025 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:54:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:54:37,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1371587662, now seen corresponding path program 5 times [2021-07-13 20:54:37,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:54:37,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378679356] [2021-07-13 20:54:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:54:37,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:37,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:54:37,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378679356] [2021-07-13 20:54:37,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378679356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:37,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497729024] [2021-07-13 20:54:37,094 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 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 [2021-07-13 20:54:37,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:54:37,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:54:37,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:54:37,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:54:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:37,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497729024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:37,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:54:37,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:54:37,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690690621] [2021-07-13 20:54:37,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:54:37,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:54:37,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:54:37,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:54:37,248 INFO L87 Difference]: Start difference. First operand 152720 states and 702517 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:39,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:54:39,534 INFO L93 Difference]: Finished difference Result 161541 states and 737182 transitions. [2021-07-13 20:54:39,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:54:39,534 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:54:39,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:54:40,855 INFO L225 Difference]: With dead ends: 161541 [2021-07-13 20:54:40,855 INFO L226 Difference]: Without dead ends: 161541 [2021-07-13 20:54:40,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:54:41,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161541 states. [2021-07-13 20:54:45,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161541 to 152520. [2021-07-13 20:54:45,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152520 states, 152519 states have (on average 4.598823753106171) internal successors, (701408), 152519 states have internal predecessors, (701408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152520 states to 152520 states and 701408 transitions. [2021-07-13 20:54:46,935 INFO L78 Accepts]: Start accepts. Automaton has 152520 states and 701408 transitions. Word has length 25 [2021-07-13 20:54:46,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:54:46,936 INFO L482 AbstractCegarLoop]: Abstraction has 152520 states and 701408 transitions. [2021-07-13 20:54:46,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:46,936 INFO L276 IsEmpty]: Start isEmpty. Operand 152520 states and 701408 transitions. [2021-07-13 20:54:47,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:54:47,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:54:47,335 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:54:47,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:47,537 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:54:47,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:54:47,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1828705168, now seen corresponding path program 6 times [2021-07-13 20:54:47,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:54:47,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239847956] [2021-07-13 20:54:47,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:54:47,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:47,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:54:47,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239847956] [2021-07-13 20:54:47,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239847956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:47,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880081646] [2021-07-13 20:54:47,567 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 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 [2021-07-13 20:54:47,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:54:47,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:54:47,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:54:47,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:54:47,865 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 20:54:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:47,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880081646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:47,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:54:47,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:54:47,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542196194] [2021-07-13 20:54:47,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:54:47,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:54:47,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:54:47,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:54:47,908 INFO L87 Difference]: Start difference. First operand 152520 states and 701408 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-07-13 20:54:49,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:54:49,729 INFO L93 Difference]: Finished difference Result 156029 states and 715406 transitions. [2021-07-13 20:54:49,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:54:49,730 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:54:49,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:54:50,565 INFO L225 Difference]: With dead ends: 156029 [2021-07-13 20:54:50,565 INFO L226 Difference]: Without dead ends: 156011 [2021-07-13 20:54:50,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 315.5ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:54:51,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156011 states. [2021-07-13 20:54:55,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156011 to 152534. [2021-07-13 20:54:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152534 states, 152533 states have (on average 4.598604892056145) internal successors, (701439), 152533 states have internal predecessors, (701439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:56,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152534 states to 152534 states and 701439 transitions. [2021-07-13 20:54:56,873 INFO L78 Accepts]: Start accepts. Automaton has 152534 states and 701439 transitions. Word has length 25 [2021-07-13 20:54:56,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:54:56,873 INFO L482 AbstractCegarLoop]: Abstraction has 152534 states and 701439 transitions. [2021-07-13 20:54:56,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-07-13 20:54:56,873 INFO L276 IsEmpty]: Start isEmpty. Operand 152534 states and 701439 transitions. [2021-07-13 20:54:57,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:54:57,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:54:57,738 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:54:57,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-13 20:54:57,953 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:54:57,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:54:57,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1290086910, now seen corresponding path program 7 times [2021-07-13 20:54:57,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:54:57,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177093880] [2021-07-13 20:54:57,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:54:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:57,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:54:57,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177093880] [2021-07-13 20:54:57,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177093880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:57,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038877154] [2021-07-13 20:54:57,988 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 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 [2021-07-13 20:54:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:58,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:54:58,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:54:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:58,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038877154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:58,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:54:58,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:54:58,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984351641] [2021-07-13 20:54:58,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:54:58,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:54:58,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:54:58,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:54:58,082 INFO L87 Difference]: Start difference. First operand 152534 states and 701439 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-07-13 20:55:00,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:55:00,562 INFO L93 Difference]: Finished difference Result 187205 states and 846532 transitions. [2021-07-13 20:55:00,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:55:00,562 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:55:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:55:02,105 INFO L225 Difference]: With dead ends: 187205 [2021-07-13 20:55:02,105 INFO L226 Difference]: Without dead ends: 187205 [2021-07-13 20:55:02,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:55:02,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187205 states. [2021-07-13 20:55:07,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187205 to 152752. [2021-07-13 20:55:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152752 states, 152751 states have (on average 4.597796413771432) internal successors, (702318), 152751 states have internal predecessors, (702318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152752 states to 152752 states and 702318 transitions. [2021-07-13 20:55:08,934 INFO L78 Accepts]: Start accepts. Automaton has 152752 states and 702318 transitions. Word has length 25 [2021-07-13 20:55:08,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:55:08,934 INFO L482 AbstractCegarLoop]: Abstraction has 152752 states and 702318 transitions. [2021-07-13 20:55:08,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-07-13 20:55:08,934 INFO L276 IsEmpty]: Start isEmpty. Operand 152752 states and 702318 transitions. [2021-07-13 20:55:09,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:55:09,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:55:09,332 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:55:09,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:55:09,536 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:55:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:55:09,537 INFO L82 PathProgramCache]: Analyzing trace with hash 2119082106, now seen corresponding path program 8 times [2021-07-13 20:55:09,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:55:09,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655073648] [2021-07-13 20:55:09,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:55:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:55:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:09,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:55:09,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655073648] [2021-07-13 20:55:09,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655073648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:09,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506239378] [2021-07-13 20:55:09,578 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 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 [2021-07-13 20:55:09,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:55:09,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:55:09,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:55:09,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:55:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:09,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506239378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:09,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:55:09,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:55:09,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865515244] [2021-07-13 20:55:09,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:55:09,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:55:09,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:55:09,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:55:09,669 INFO L87 Difference]: Start difference. First operand 152752 states and 702318 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-07-13 20:55:11,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:55:11,669 INFO L93 Difference]: Finished difference Result 153348 states and 704507 transitions. [2021-07-13 20:55:11,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:55:11,689 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:55:11,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:55:12,569 INFO L225 Difference]: With dead ends: 153348 [2021-07-13 20:55:12,570 INFO L226 Difference]: Without dead ends: 153248 [2021-07-13 20:55:12,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:55:12,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153248 states. [2021-07-13 20:55:17,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153248 to 152808. [2021-07-13 20:55:17,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152808 states, 152807 states have (on average 4.597446452060442) internal successors, (702522), 152807 states have internal predecessors, (702522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152808 states to 152808 states and 702522 transitions. [2021-07-13 20:55:19,023 INFO L78 Accepts]: Start accepts. Automaton has 152808 states and 702522 transitions. Word has length 25 [2021-07-13 20:55:19,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:55:19,024 INFO L482 AbstractCegarLoop]: Abstraction has 152808 states and 702522 transitions. [2021-07-13 20:55:19,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-07-13 20:55:19,024 INFO L276 IsEmpty]: Start isEmpty. Operand 152808 states and 702522 transitions. [2021-07-13 20:55:19,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:55:19,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:55:19,912 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:55:20,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:55:20,137 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:55:20,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:55:20,137 INFO L82 PathProgramCache]: Analyzing trace with hash -656052858, now seen corresponding path program 9 times [2021-07-13 20:55:20,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:55:20,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919400765] [2021-07-13 20:55:20,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:55:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:55:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:20,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:55:20,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919400765] [2021-07-13 20:55:20,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919400765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:20,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535989414] [2021-07-13 20:55:20,208 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 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 [2021-07-13 20:55:20,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:55:20,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:55:20,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:55:20,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:55:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:20,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535989414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:20,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:55:20,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:55:20,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554724236] [2021-07-13 20:55:20,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:55:20,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:55:20,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:55:20,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:55:20,358 INFO L87 Difference]: Start difference. First operand 152808 states and 702522 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-07-13 20:55:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:55:24,483 INFO L93 Difference]: Finished difference Result 254992 states and 1153363 transitions. [2021-07-13 20:55:24,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:55:24,493 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 25 [2021-07-13 20:55:24,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:55:26,719 INFO L225 Difference]: With dead ends: 254992 [2021-07-13 20:55:26,720 INFO L226 Difference]: Without dead ends: 254992 [2021-07-13 20:55:26,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:55:27,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254992 states. [2021-07-13 20:55:33,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254992 to 167585. [2021-07-13 20:55:33,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167585 states, 167584 states have (on average 4.616341655527974) internal successors, (773625), 167584 states have internal predecessors, (773625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167585 states to 167585 states and 773625 transitions. [2021-07-13 20:55:35,391 INFO L78 Accepts]: Start accepts. Automaton has 167585 states and 773625 transitions. Word has length 25 [2021-07-13 20:55:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:55:35,391 INFO L482 AbstractCegarLoop]: Abstraction has 167585 states and 773625 transitions. [2021-07-13 20:55:35,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-07-13 20:55:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 167585 states and 773625 transitions. [2021-07-13 20:55:35,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:55:35,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:55:35,896 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:55:36,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:55:36,096 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:55:36,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:55:36,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1715216728, now seen corresponding path program 10 times [2021-07-13 20:55:36,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:55:36,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822966398] [2021-07-13 20:55:36,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:55:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:55:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:36,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:55:36,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822966398] [2021-07-13 20:55:36,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822966398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:36,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592861743] [2021-07-13 20:55:36,142 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 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 [2021-07-13 20:55:36,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:55:36,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:55:36,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:55:36,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:55:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:36,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592861743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:36,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:55:36,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:55:36,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582033802] [2021-07-13 20:55:36,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:55:36,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:55:36,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:55:36,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:55:36,230 INFO L87 Difference]: Start difference. First operand 167585 states and 773625 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-07-13 20:55:38,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:55:38,724 INFO L93 Difference]: Finished difference Result 216803 states and 978719 transitions. [2021-07-13 20:55:38,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:55:38,725 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:55:38,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:55:40,373 INFO L225 Difference]: With dead ends: 216803 [2021-07-13 20:55:40,373 INFO L226 Difference]: Without dead ends: 216803 [2021-07-13 20:55:40,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:55:40,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216803 states. [2021-07-13 20:55:46,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216803 to 169071. [2021-07-13 20:55:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169071 states, 169070 states have (on average 4.613083338262258) internal successors, (779934), 169070 states have internal predecessors, (779934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:49,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169071 states to 169071 states and 779934 transitions. [2021-07-13 20:55:49,351 INFO L78 Accepts]: Start accepts. Automaton has 169071 states and 779934 transitions. Word has length 25 [2021-07-13 20:55:49,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:55:49,351 INFO L482 AbstractCegarLoop]: Abstraction has 169071 states and 779934 transitions. [2021-07-13 20:55:49,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-07-13 20:55:49,363 INFO L276 IsEmpty]: Start isEmpty. Operand 169071 states and 779934 transitions. [2021-07-13 20:55:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:55:50,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:55:50,007 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:55:50,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:55:50,207 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:55:50,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:55:50,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1504675330, now seen corresponding path program 11 times [2021-07-13 20:55:50,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:55:50,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827900709] [2021-07-13 20:55:50,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:55:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:55:50,538 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 26 [2021-07-13 20:55:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:50,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:55:50,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827900709] [2021-07-13 20:55:50,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827900709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:50,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535803926] [2021-07-13 20:55:50,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:55:50,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:55:50,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:55:50,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:55:50,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:55:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:50,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535803926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:50,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:55:50,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-07-13 20:55:50,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044314967] [2021-07-13 20:55:50,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:55:50,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:55:50,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:55:50,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:55:50,726 INFO L87 Difference]: Start difference. First operand 169071 states and 779934 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:52,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:55:52,666 INFO L93 Difference]: Finished difference Result 190564 states and 868690 transitions. [2021-07-13 20:55:52,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:55:52,667 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:55:52,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:55:54,000 INFO L225 Difference]: With dead ends: 190564 [2021-07-13 20:55:54,001 INFO L226 Difference]: Without dead ends: 190336 [2021-07-13 20:55:54,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:55:54,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190336 states. [2021-07-13 20:55:59,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190336 to 169413. [2021-07-13 20:55:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169413 states, 169412 states have (on average 4.612908176516422) internal successors, (781482), 169412 states have internal predecessors, (781482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169413 states to 169413 states and 781482 transitions. [2021-07-13 20:56:00,949 INFO L78 Accepts]: Start accepts. Automaton has 169413 states and 781482 transitions. Word has length 25 [2021-07-13 20:56:00,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:56:00,949 INFO L482 AbstractCegarLoop]: Abstraction has 169413 states and 781482 transitions. [2021-07-13 20:56:00,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:00,950 INFO L276 IsEmpty]: Start isEmpty. Operand 169413 states and 781482 transitions. [2021-07-13 20:56:01,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:56:01,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:56:01,401 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:56:01,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 20:56:01,602 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:56:01,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:56:01,602 INFO L82 PathProgramCache]: Analyzing trace with hash -423308966, now seen corresponding path program 12 times [2021-07-13 20:56:01,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:56:01,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604416676] [2021-07-13 20:56:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:56:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:56:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:01,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:56:01,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604416676] [2021-07-13 20:56:01,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604416676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:01,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168772936] [2021-07-13 20:56:01,631 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 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 [2021-07-13 20:56:01,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:56:01,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:56:01,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:56:01,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:56:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:01,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168772936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:01,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:56:01,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:56:01,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933543248] [2021-07-13 20:56:01,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:56:01,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:56:01,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:56:01,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:56:01,738 INFO L87 Difference]: Start difference. First operand 169413 states and 781482 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:04,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:56:04,805 INFO L93 Difference]: Finished difference Result 262079 states and 1183330 transitions. [2021-07-13 20:56:04,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:56:04,805 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:56:04,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:56:07,456 INFO L225 Difference]: With dead ends: 262079 [2021-07-13 20:56:07,456 INFO L226 Difference]: Without dead ends: 262061 [2021-07-13 20:56:07,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:56:08,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262061 states. [2021-07-13 20:56:15,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262061 to 170992. [2021-07-13 20:56:15,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170992 states, 170991 states have (on average 4.612985478767889) internal successors, (788779), 170991 states have internal predecessors, (788779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:16,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170992 states to 170992 states and 788779 transitions. [2021-07-13 20:56:16,467 INFO L78 Accepts]: Start accepts. Automaton has 170992 states and 788779 transitions. Word has length 25 [2021-07-13 20:56:16,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:56:16,467 INFO L482 AbstractCegarLoop]: Abstraction has 170992 states and 788779 transitions. [2021-07-13 20:56:16,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:16,467 INFO L276 IsEmpty]: Start isEmpty. Operand 170992 states and 788779 transitions. [2021-07-13 20:56:17,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:56:17,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:56:17,250 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:56:17,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:56:17,451 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:56:17,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:56:17,451 INFO L82 PathProgramCache]: Analyzing trace with hash -206280976, now seen corresponding path program 13 times [2021-07-13 20:56:17,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:56:17,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893266060] [2021-07-13 20:56:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:56:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:56:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:17,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:56:17,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893266060] [2021-07-13 20:56:17,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893266060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:17,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249484635] [2021-07-13 20:56:17,484 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 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 [2021-07-13 20:56:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:56:17,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:56:17,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:56:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:17,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249484635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:17,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:56:17,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:56:17,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869447461] [2021-07-13 20:56:17,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:56:17,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:56:17,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:56:17,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:56:17,574 INFO L87 Difference]: Start difference. First operand 170992 states and 788779 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:20,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:56:20,019 INFO L93 Difference]: Finished difference Result 223330 states and 1021133 transitions. [2021-07-13 20:56:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:56:20,019 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:56:20,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:56:21,630 INFO L225 Difference]: With dead ends: 223330 [2021-07-13 20:56:21,630 INFO L226 Difference]: Without dead ends: 223330 [2021-07-13 20:56:21,630 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:56:21,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223330 states. [2021-07-13 20:56:27,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223330 to 171112. [2021-07-13 20:56:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171112 states, 171111 states have (on average 4.612830268071603) internal successors, (789306), 171111 states have internal predecessors, (789306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:29,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171112 states to 171112 states and 789306 transitions. [2021-07-13 20:56:29,215 INFO L78 Accepts]: Start accepts. Automaton has 171112 states and 789306 transitions. Word has length 25 [2021-07-13 20:56:29,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:56:29,215 INFO L482 AbstractCegarLoop]: Abstraction has 171112 states and 789306 transitions. [2021-07-13 20:56:29,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:29,216 INFO L276 IsEmpty]: Start isEmpty. Operand 171112 states and 789306 transitions. [2021-07-13 20:56:29,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:56:29,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:56:29,990 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:56:30,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-13 20:56:30,191 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:56:30,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:56:30,191 INFO L82 PathProgramCache]: Analyzing trace with hash 64907726, now seen corresponding path program 14 times [2021-07-13 20:56:30,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:56:30,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244336618] [2021-07-13 20:56:30,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:56:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:56:30,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:30,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:56:30,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244336618] [2021-07-13 20:56:30,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244336618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:30,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705802658] [2021-07-13 20:56:30,223 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 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 [2021-07-13 20:56:30,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:56:30,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:56:30,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:56:30,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:56:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:30,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705802658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:30,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:56:30,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:56:30,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027993099] [2021-07-13 20:56:30,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:56:30,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:56:30,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:56:30,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:56:30,330 INFO L87 Difference]: Start difference. First operand 171112 states and 789306 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:33,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:56:33,804 INFO L93 Difference]: Finished difference Result 271293 states and 1227721 transitions. [2021-07-13 20:56:33,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:56:33,805 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:56:33,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:56:36,236 INFO L225 Difference]: With dead ends: 271293 [2021-07-13 20:56:36,236 INFO L226 Difference]: Without dead ends: 271293 [2021-07-13 20:56:36,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:56:36,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271293 states. [2021-07-13 20:56:43,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271293 to 180348. [2021-07-13 20:56:44,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180348 states, 180347 states have (on average 4.606841256023111) internal successors, (830830), 180347 states have internal predecessors, (830830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:45,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180348 states to 180348 states and 830830 transitions. [2021-07-13 20:56:45,428 INFO L78 Accepts]: Start accepts. Automaton has 180348 states and 830830 transitions. Word has length 25 [2021-07-13 20:56:45,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:56:45,428 INFO L482 AbstractCegarLoop]: Abstraction has 180348 states and 830830 transitions. [2021-07-13 20:56:45,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:45,428 INFO L276 IsEmpty]: Start isEmpty. Operand 180348 states and 830830 transitions. [2021-07-13 20:56:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:56:46,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:56:46,172 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:56:46,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:56:46,385 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:56:46,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:56:46,385 INFO L82 PathProgramCache]: Analyzing trace with hash 115677808, now seen corresponding path program 15 times [2021-07-13 20:56:46,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:56:46,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355212060] [2021-07-13 20:56:46,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:56:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:56:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:46,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:56:46,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355212060] [2021-07-13 20:56:46,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355212060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:46,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787574522] [2021-07-13 20:56:46,421 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 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 [2021-07-13 20:56:46,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:56:46,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:56:46,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:56:46,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:56:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:46,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787574522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:46,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:56:46,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:56:46,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899637726] [2021-07-13 20:56:46,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:56:46,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:56:46,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:56:46,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:56:46,494 INFO L87 Difference]: Start difference. First operand 180348 states and 830830 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-07-13 20:56:49,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:56:49,070 INFO L93 Difference]: Finished difference Result 228294 states and 1029691 transitions. [2021-07-13 20:56:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:56:49,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 25 [2021-07-13 20:56:49,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:56:50,677 INFO L225 Difference]: With dead ends: 228294 [2021-07-13 20:56:50,677 INFO L226 Difference]: Without dead ends: 228294 [2021-07-13 20:56:50,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:56:50,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228294 states. [2021-07-13 20:56:57,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228294 to 181280. [2021-07-13 20:56:57,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181280 states, 181279 states have (on average 4.603886826383641) internal successors, (834588), 181279 states have internal predecessors, (834588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:58,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181280 states to 181280 states and 834588 transitions. [2021-07-13 20:56:58,549 INFO L78 Accepts]: Start accepts. Automaton has 181280 states and 834588 transitions. Word has length 25 [2021-07-13 20:56:58,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:56:58,549 INFO L482 AbstractCegarLoop]: Abstraction has 181280 states and 834588 transitions. [2021-07-13 20:56:58,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-07-13 20:56:58,549 INFO L276 IsEmpty]: Start isEmpty. Operand 181280 states and 834588 transitions. [2021-07-13 20:56:59,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:56:59,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:56:59,320 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:56:59,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-13 20:56:59,521 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:56:59,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:56:59,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1557868062, now seen corresponding path program 16 times [2021-07-13 20:56:59,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:56:59,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278262254] [2021-07-13 20:56:59,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:56:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:56:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:59,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:56:59,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278262254] [2021-07-13 20:56:59,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278262254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:59,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962293749] [2021-07-13 20:56:59,570 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 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 [2021-07-13 20:56:59,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:56:59,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:56:59,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:56:59,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:56:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:59,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962293749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:59,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:56:59,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:56:59,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985840272] [2021-07-13 20:56:59,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:56:59,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:56:59,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:56:59,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:56:59,674 INFO L87 Difference]: Start difference. First operand 181280 states and 834588 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:02,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:57:02,895 INFO L93 Difference]: Finished difference Result 206101 states and 938235 transitions. [2021-07-13 20:57:02,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:57:02,896 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:57:02,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:57:04,316 INFO L225 Difference]: With dead ends: 206101 [2021-07-13 20:57:04,317 INFO L226 Difference]: Without dead ends: 205937 [2021-07-13 20:57:04,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:57:04,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205937 states. [2021-07-13 20:57:10,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205937 to 181308. [2021-07-13 20:57:10,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181308 states, 181307 states have (on average 4.603799081116559) internal successors, (834701), 181307 states have internal predecessors, (834701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:12,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181308 states to 181308 states and 834701 transitions. [2021-07-13 20:57:12,170 INFO L78 Accepts]: Start accepts. Automaton has 181308 states and 834701 transitions. Word has length 25 [2021-07-13 20:57:12,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:57:12,170 INFO L482 AbstractCegarLoop]: Abstraction has 181308 states and 834701 transitions. [2021-07-13 20:57:12,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:12,170 INFO L276 IsEmpty]: Start isEmpty. Operand 181308 states and 834701 transitions. [2021-07-13 20:57:12,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:57:12,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:57:12,667 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:57:12,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 20:57:12,868 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:57:12,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:57:12,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1245125948, now seen corresponding path program 17 times [2021-07-13 20:57:12,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:57:12,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568254360] [2021-07-13 20:57:12,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:57:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:57:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:57:12,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:57:12,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568254360] [2021-07-13 20:57:12,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568254360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:12,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418018489] [2021-07-13 20:57:12,909 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 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 [2021-07-13 20:57:12,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:57:12,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:57:12,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:57:12,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:57:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:57:12,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418018489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:12,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:57:12,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:57:12,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038947073] [2021-07-13 20:57:12,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:57:12,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:57:12,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:57:12,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:57:12,992 INFO L87 Difference]: Start difference. First operand 181308 states and 834701 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-07-13 20:57:15,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:57:15,201 INFO L93 Difference]: Finished difference Result 182017 states and 837141 transitions. [2021-07-13 20:57:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:57:15,201 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 25 [2021-07-13 20:57:15,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:57:16,591 INFO L225 Difference]: With dead ends: 182017 [2021-07-13 20:57:16,591 INFO L226 Difference]: Without dead ends: 181917 [2021-07-13 20:57:16,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:57:16,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181917 states. [2021-07-13 20:57:22,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181917 to 181308. [2021-07-13 20:57:22,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181308 states, 181307 states have (on average 4.603650162431677) internal successors, (834674), 181307 states have internal predecessors, (834674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:23,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181308 states to 181308 states and 834674 transitions. [2021-07-13 20:57:23,753 INFO L78 Accepts]: Start accepts. Automaton has 181308 states and 834674 transitions. Word has length 25 [2021-07-13 20:57:23,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:57:23,754 INFO L482 AbstractCegarLoop]: Abstraction has 181308 states and 834674 transitions. [2021-07-13 20:57:23,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-07-13 20:57:23,754 INFO L276 IsEmpty]: Start isEmpty. Operand 181308 states and 834674 transitions. [2021-07-13 20:57:24,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:57:24,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:57:24,565 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:57:24,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-13 20:57:24,781 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:57:24,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:57:24,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1690564398, now seen corresponding path program 7 times [2021-07-13 20:57:24,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:57:24,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836574858] [2021-07-13 20:57:24,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:57:24,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:57:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:57:24,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:57:24,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836574858] [2021-07-13 20:57:24,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836574858] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:57:24,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:57:24,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:57:24,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244246487] [2021-07-13 20:57:24,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:57:24,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:57:24,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:57:24,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:57:24,805 INFO L87 Difference]: Start difference. First operand 181308 states and 834674 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:26,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:57:26,991 INFO L93 Difference]: Finished difference Result 198214 states and 888498 transitions. [2021-07-13 20:57:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:57:27,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:57:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:57:28,604 INFO L225 Difference]: With dead ends: 198214 [2021-07-13 20:57:28,604 INFO L226 Difference]: Without dead ends: 164346 [2021-07-13 20:57:28,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:57:29,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164346 states. [2021-07-13 20:57:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164346 to 125085. [2021-07-13 20:57:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125085 states, 125084 states have (on average 4.721331265389658) internal successors, (590563), 125084 states have internal predecessors, (590563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125085 states to 125085 states and 590563 transitions. [2021-07-13 20:57:34,371 INFO L78 Accepts]: Start accepts. Automaton has 125085 states and 590563 transitions. Word has length 25 [2021-07-13 20:57:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:57:34,371 INFO L482 AbstractCegarLoop]: Abstraction has 125085 states and 590563 transitions. [2021-07-13 20:57:34,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:34,371 INFO L276 IsEmpty]: Start isEmpty. Operand 125085 states and 590563 transitions. [2021-07-13 20:57:34,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:57:34,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:57:34,720 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:57:34,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-07-13 20:57:34,720 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:57:34,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:57:34,720 INFO L82 PathProgramCache]: Analyzing trace with hash 103022096, now seen corresponding path program 8 times [2021-07-13 20:57:34,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:57:34,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464230816] [2021-07-13 20:57:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:57:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:57:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:57:34,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:57:34,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464230816] [2021-07-13 20:57:34,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464230816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:34,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956212398] [2021-07-13 20:57:34,745 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:57:34,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:57:34,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:57:34,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:57:34,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:57:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:57:34,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956212398] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:57:34,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:57:34,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-07-13 20:57:34,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827237355] [2021-07-13 20:57:34,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:57:34,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:57:34,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:57:34,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:57:34,814 INFO L87 Difference]: Start difference. First operand 125085 states and 590563 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:36,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:57:36,245 INFO L93 Difference]: Finished difference Result 130126 states and 607352 transitions. [2021-07-13 20:57:36,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:57:36,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:57:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:57:37,199 INFO L225 Difference]: With dead ends: 130126 [2021-07-13 20:57:37,199 INFO L226 Difference]: Without dead ends: 127575 [2021-07-13 20:57:37,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:57:37,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127575 states. [2021-07-13 20:57:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127575 to 87700. [2021-07-13 20:57:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87700 states, 87699 states have (on average 4.690794649881982) internal successors, (411378), 87699 states have internal predecessors, (411378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:40,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87700 states to 87700 states and 411378 transitions. [2021-07-13 20:57:40,353 INFO L78 Accepts]: Start accepts. Automaton has 87700 states and 411378 transitions. Word has length 25 [2021-07-13 20:57:40,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:57:40,353 INFO L482 AbstractCegarLoop]: Abstraction has 87700 states and 411378 transitions. [2021-07-13 20:57:40,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:40,353 INFO L276 IsEmpty]: Start isEmpty. Operand 87700 states and 411378 transitions. [2021-07-13 20:57:40,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:57:40,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:57:40,870 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:57:41,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-07-13 20:57:41,070 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:57:41,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:57:41,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1193216718, now seen corresponding path program 9 times [2021-07-13 20:57:41,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:57:41,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442260148] [2021-07-13 20:57:41,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:57:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:57:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:57:41,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:57:41,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442260148] [2021-07-13 20:57:41,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442260148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:41,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534726515] [2021-07-13 20:57:41,114 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 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 [2021-07-13 20:57:41,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:57:41,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:57:41,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:57:41,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:57:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:57:41,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534726515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:41,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:57:41,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:57:41,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035375725] [2021-07-13 20:57:41,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:57:41,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:57:41,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:57:41,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:57:41,173 INFO L87 Difference]: Start difference. First operand 87700 states and 411378 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:42,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:57:42,002 INFO L93 Difference]: Finished difference Result 89555 states and 418507 transitions. [2021-07-13 20:57:42,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:57:42,002 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:57:42,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:57:42,428 INFO L225 Difference]: With dead ends: 89555 [2021-07-13 20:57:42,428 INFO L226 Difference]: Without dead ends: 89419 [2021-07-13 20:57:42,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:57:42,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89419 states. [2021-07-13 20:57:44,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89419 to 87693. [2021-07-13 20:57:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87693 states, 87692 states have (on average 4.691762076358162) internal successors, (411430), 87692 states have internal predecessors, (411430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87693 states to 87693 states and 411430 transitions. [2021-07-13 20:57:45,172 INFO L78 Accepts]: Start accepts. Automaton has 87693 states and 411430 transitions. Word has length 25 [2021-07-13 20:57:45,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:57:45,172 INFO L482 AbstractCegarLoop]: Abstraction has 87693 states and 411430 transitions. [2021-07-13 20:57:45,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:45,172 INFO L276 IsEmpty]: Start isEmpty. Operand 87693 states and 411430 transitions. [2021-07-13 20:57:45,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:57:45,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:57:45,390 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:57:45,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:57:45,590 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:57:45,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:57:45,590 INFO L82 PathProgramCache]: Analyzing trace with hash -648382774, now seen corresponding path program 10 times [2021-07-13 20:57:45,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:57:45,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350197512] [2021-07-13 20:57:45,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:57:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:57:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:57:45,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:57:45,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350197512] [2021-07-13 20:57:45,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350197512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:45,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906075118] [2021-07-13 20:57:45,634 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:57:45,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:57:45,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:57:45,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:57:45,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:57:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:57:45,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906075118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:45,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:57:45,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:57:45,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144394318] [2021-07-13 20:57:45,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:57:45,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:57:45,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:57:45,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:57:45,708 INFO L87 Difference]: Start difference. First operand 87693 states and 411430 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:46,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:57:46,825 INFO L93 Difference]: Finished difference Result 89703 states and 419257 transitions. [2021-07-13 20:57:46,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:57:46,826 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:57:46,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:57:47,237 INFO L225 Difference]: With dead ends: 89703 [2021-07-13 20:57:47,237 INFO L226 Difference]: Without dead ends: 89567 [2021-07-13 20:57:47,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:57:47,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89567 states. [2021-07-13 20:57:49,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89567 to 87714. [2021-07-13 20:57:49,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87714 states, 87713 states have (on average 4.692006886094422) internal successors, (411550), 87713 states have internal predecessors, (411550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:50,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87714 states to 87714 states and 411550 transitions. [2021-07-13 20:57:50,026 INFO L78 Accepts]: Start accepts. Automaton has 87714 states and 411550 transitions. Word has length 25 [2021-07-13 20:57:50,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:57:50,027 INFO L482 AbstractCegarLoop]: Abstraction has 87714 states and 411550 transitions. [2021-07-13 20:57:50,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:50,027 INFO L276 IsEmpty]: Start isEmpty. Operand 87714 states and 411550 transitions. [2021-07-13 20:57:50,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:57:50,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:57:50,526 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:57:50,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:57:50,741 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:57:50,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:57:50,741 INFO L82 PathProgramCache]: Analyzing trace with hash -961842550, now seen corresponding path program 11 times [2021-07-13 20:57:50,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:57:50,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036101884] [2021-07-13 20:57:50,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:57:50,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:57:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:57:50,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:57:50,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036101884] [2021-07-13 20:57:50,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036101884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:50,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736423752] [2021-07-13 20:57:50,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:57:50,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:57:50,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:57:50,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:57:50,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:57:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:57:50,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736423752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:50,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:57:50,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:57:50,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337442617] [2021-07-13 20:57:50,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:57:50,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:57:50,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:57:50,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:57:50,920 INFO L87 Difference]: Start difference. First operand 87714 states and 411550 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:52,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:57:52,028 INFO L93 Difference]: Finished difference Result 89056 states and 416830 transitions. [2021-07-13 20:57:52,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:57:52,029 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:57:52,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:57:52,589 INFO L225 Difference]: With dead ends: 89056 [2021-07-13 20:57:52,589 INFO L226 Difference]: Without dead ends: 88940 [2021-07-13 20:57:52,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:57:52,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88940 states. [2021-07-13 20:57:54,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88940 to 87736. [2021-07-13 20:57:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87736 states, 87735 states have (on average 4.692141106741893) internal successors, (411665), 87735 states have internal predecessors, (411665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:55,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87736 states to 87736 states and 411665 transitions. [2021-07-13 20:57:55,304 INFO L78 Accepts]: Start accepts. Automaton has 87736 states and 411665 transitions. Word has length 25 [2021-07-13 20:57:55,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:57:55,305 INFO L482 AbstractCegarLoop]: Abstraction has 87736 states and 411665 transitions. [2021-07-13 20:57:55,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:55,305 INFO L276 IsEmpty]: Start isEmpty. Operand 87736 states and 411665 transitions. [2021-07-13 20:57:55,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:57:55,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:57:55,822 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:57:56,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-13 20:57:56,022 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:57:56,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:57:56,023 INFO L82 PathProgramCache]: Analyzing trace with hash 394898822, now seen corresponding path program 12 times [2021-07-13 20:57:56,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:57:56,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994998211] [2021-07-13 20:57:56,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:57:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:57:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:57:56,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:57:56,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994998211] [2021-07-13 20:57:56,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994998211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:56,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933656920] [2021-07-13 20:57:56,081 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 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 [2021-07-13 20:57:56,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:57:56,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:57:56,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:57:56,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:57:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:57:56,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933656920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:56,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:57:56,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:57:56,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949327666] [2021-07-13 20:57:56,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:57:56,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:57:56,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:57:56,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:57:56,157 INFO L87 Difference]: Start difference. First operand 87736 states and 411665 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:56,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:57:56,984 INFO L93 Difference]: Finished difference Result 88944 states and 416367 transitions. [2021-07-13 20:57:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:57:56,984 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:57:56,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:57:57,397 INFO L225 Difference]: With dead ends: 88944 [2021-07-13 20:57:57,397 INFO L226 Difference]: Without dead ends: 88848 [2021-07-13 20:57:57,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:57:57,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88848 states. [2021-07-13 20:57:59,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88848 to 87758. [2021-07-13 20:57:59,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87758 states, 87757 states have (on average 4.692412001321832) internal successors, (411792), 87757 states have internal predecessors, (411792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87758 states to 87758 states and 411792 transitions. [2021-07-13 20:58:00,075 INFO L78 Accepts]: Start accepts. Automaton has 87758 states and 411792 transitions. Word has length 25 [2021-07-13 20:58:00,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:00,076 INFO L482 AbstractCegarLoop]: Abstraction has 87758 states and 411792 transitions. [2021-07-13 20:58:00,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:00,076 INFO L276 IsEmpty]: Start isEmpty. Operand 87758 states and 411792 transitions. [2021-07-13 20:58:00,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:58:00,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:00,293 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:58:00,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 20:58:00,493 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:58:00,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:58:00,493 INFO L82 PathProgramCache]: Analyzing trace with hash 267220118, now seen corresponding path program 13 times [2021-07-13 20:58:00,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:58:00,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361412099] [2021-07-13 20:58:00,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:58:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:58:00,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:58:00,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361412099] [2021-07-13 20:58:00,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361412099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:00,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019244377] [2021-07-13 20:58:00,543 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 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 [2021-07-13 20:58:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:00,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:58:00,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:58:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:58:00,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019244377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:00,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:58:00,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:58:00,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188230516] [2021-07-13 20:58:00,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:58:00,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:58:00,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:58:00,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:58:00,598 INFO L87 Difference]: Start difference. First operand 87758 states and 411792 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:01,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:01,718 INFO L93 Difference]: Finished difference Result 90259 states and 421196 transitions. [2021-07-13 20:58:01,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:58:01,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:58:01,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:02,130 INFO L225 Difference]: With dead ends: 90259 [2021-07-13 20:58:02,130 INFO L226 Difference]: Without dead ends: 90123 [2021-07-13 20:58:02,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:58:02,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90123 states. [2021-07-13 20:58:04,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90123 to 87809. [2021-07-13 20:58:04,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87809 states, 87808 states have (on average 4.692852587463557) internal successors, (412070), 87808 states have internal predecessors, (412070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:04,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87809 states to 87809 states and 412070 transitions. [2021-07-13 20:58:04,994 INFO L78 Accepts]: Start accepts. Automaton has 87809 states and 412070 transitions. Word has length 25 [2021-07-13 20:58:04,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:04,994 INFO L482 AbstractCegarLoop]: Abstraction has 87809 states and 412070 transitions. [2021-07-13 20:58:04,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:04,994 INFO L276 IsEmpty]: Start isEmpty. Operand 87809 states and 412070 transitions. [2021-07-13 20:58:05,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:58:05,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:05,209 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:58:05,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 20:58:05,410 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:58:05,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:58:05,410 INFO L82 PathProgramCache]: Analyzing trace with hash -46239658, now seen corresponding path program 14 times [2021-07-13 20:58:05,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:58:05,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929690768] [2021-07-13 20:58:05,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:58:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:58:05,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:58:05,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929690768] [2021-07-13 20:58:05,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929690768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:05,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489247510] [2021-07-13 20:58:05,479 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 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 [2021-07-13 20:58:05,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:58:05,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:58:05,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:58:05,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:58:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:58:05,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489247510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:05,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:58:05,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:58:05,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900049938] [2021-07-13 20:58:05,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:58:05,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:58:05,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:58:05,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:58:05,539 INFO L87 Difference]: Start difference. First operand 87809 states and 412070 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:06,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:06,735 INFO L93 Difference]: Finished difference Result 89754 states and 419470 transitions. [2021-07-13 20:58:06,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:58:06,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:58:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:07,165 INFO L225 Difference]: With dead ends: 89754 [2021-07-13 20:58:07,165 INFO L226 Difference]: Without dead ends: 89638 [2021-07-13 20:58:07,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:58:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89638 states. [2021-07-13 20:58:09,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89638 to 87839. [2021-07-13 20:58:09,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87839 states, 87838 states have (on average 4.693196566406339) internal successors, (412241), 87838 states have internal predecessors, (412241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:10,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87839 states to 87839 states and 412241 transitions. [2021-07-13 20:58:10,048 INFO L78 Accepts]: Start accepts. Automaton has 87839 states and 412241 transitions. Word has length 25 [2021-07-13 20:58:10,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:10,048 INFO L482 AbstractCegarLoop]: Abstraction has 87839 states and 412241 transitions. [2021-07-13 20:58:10,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:10,049 INFO L276 IsEmpty]: Start isEmpty. Operand 87839 states and 412241 transitions. [2021-07-13 20:58:10,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:58:10,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:10,283 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:58:10,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 20:58:10,484 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:58:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:58:10,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1310501714, now seen corresponding path program 15 times [2021-07-13 20:58:10,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:58:10,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642283646] [2021-07-13 20:58:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:58:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:58:10,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:58:10,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642283646] [2021-07-13 20:58:10,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642283646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:10,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702100056] [2021-07-13 20:58:10,550 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 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 [2021-07-13 20:58:10,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:58:10,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:58:10,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:58:10,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:58:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:58:10,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702100056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:10,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:58:10,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:58:10,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375266127] [2021-07-13 20:58:10,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:58:10,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:58:10,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:58:10,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:58:10,609 INFO L87 Difference]: Start difference. First operand 87839 states and 412241 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:11,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:11,490 INFO L93 Difference]: Finished difference Result 89966 states and 420506 transitions. [2021-07-13 20:58:11,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:58:11,490 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:58:11,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:12,115 INFO L225 Difference]: With dead ends: 89966 [2021-07-13 20:58:12,115 INFO L226 Difference]: Without dead ends: 89870 [2021-07-13 20:58:12,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:58:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89870 states. [2021-07-13 20:58:14,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89870 to 87873. [2021-07-13 20:58:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87873 states, 87872 states have (on average 4.6936453022578295) internal successors, (412440), 87872 states have internal predecessors, (412440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:14,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87873 states to 87873 states and 412440 transitions. [2021-07-13 20:58:14,943 INFO L78 Accepts]: Start accepts. Automaton has 87873 states and 412440 transitions. Word has length 25 [2021-07-13 20:58:14,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:14,943 INFO L482 AbstractCegarLoop]: Abstraction has 87873 states and 412440 transitions. [2021-07-13 20:58:14,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 87873 states and 412440 transitions. [2021-07-13 20:58:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:58:15,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:15,583 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:58:15,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-07-13 20:58:15,797 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:58:15,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:58:15,797 INFO L82 PathProgramCache]: Analyzing trace with hash 523034708, now seen corresponding path program 9 times [2021-07-13 20:58:15,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:58:15,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076621905] [2021-07-13 20:58:15,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:58:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:58:15,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:58:15,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076621905] [2021-07-13 20:58:15,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076621905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:15,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878926756] [2021-07-13 20:58:15,812 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 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 [2021-07-13 20:58:15,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:58:15,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:58:15,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:58:15,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:58:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:58:15,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878926756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:15,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:58:15,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 20:58:15,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139001467] [2021-07-13 20:58:15,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:58:15,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:58:15,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:58:15,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:58:15,887 INFO L87 Difference]: Start difference. First operand 87873 states and 412440 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-07-13 20:58:16,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:16,884 INFO L93 Difference]: Finished difference Result 97671 states and 457254 transitions. [2021-07-13 20:58:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:58:16,884 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:58:16,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:17,593 INFO L225 Difference]: With dead ends: 97671 [2021-07-13 20:58:17,593 INFO L226 Difference]: Without dead ends: 97564 [2021-07-13 20:58:17,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:58:17,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97564 states. [2021-07-13 20:58:19,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97564 to 96045. [2021-07-13 20:58:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96045 states, 96044 states have (on average 4.702969472325185) internal successors, (451692), 96044 states have internal predecessors, (451692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96045 states to 96045 states and 451692 transitions. [2021-07-13 20:58:20,614 INFO L78 Accepts]: Start accepts. Automaton has 96045 states and 451692 transitions. Word has length 25 [2021-07-13 20:58:20,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:20,614 INFO L482 AbstractCegarLoop]: Abstraction has 96045 states and 451692 transitions. [2021-07-13 20:58:20,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-07-13 20:58:20,614 INFO L276 IsEmpty]: Start isEmpty. Operand 96045 states and 451692 transitions. [2021-07-13 20:58:20,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:58:20,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:20,855 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:58:21,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:58:21,056 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:58:21,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:58:21,056 INFO L82 PathProgramCache]: Analyzing trace with hash -857833266, now seen corresponding path program 16 times [2021-07-13 20:58:21,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:58:21,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285821896] [2021-07-13 20:58:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:58:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:21,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:58:21,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:58:21,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285821896] [2021-07-13 20:58:21,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285821896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:21,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816744570] [2021-07-13 20:58:21,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:58:21,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:58:21,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:58:21,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:58:21,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:58:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:58:21,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816744570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:21,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:58:21,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:58:21,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983394460] [2021-07-13 20:58:21,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:58:21,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:58:21,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:58:21,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:58:21,192 INFO L87 Difference]: Start difference. First operand 96045 states and 451692 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:22,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:22,357 INFO L93 Difference]: Finished difference Result 97830 states and 458461 transitions. [2021-07-13 20:58:22,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:58:22,357 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:58:22,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:22,841 INFO L225 Difference]: With dead ends: 97830 [2021-07-13 20:58:22,842 INFO L226 Difference]: Without dead ends: 97714 [2021-07-13 20:58:22,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:58:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97714 states. [2021-07-13 20:58:24,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97714 to 96069. [2021-07-13 20:58:25,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96069 states, 96068 states have (on average 4.703106133155681) internal successors, (451818), 96068 states have internal predecessors, (451818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:25,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96069 states to 96069 states and 451818 transitions. [2021-07-13 20:58:25,803 INFO L78 Accepts]: Start accepts. Automaton has 96069 states and 451818 transitions. Word has length 25 [2021-07-13 20:58:25,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:25,804 INFO L482 AbstractCegarLoop]: Abstraction has 96069 states and 451818 transitions. [2021-07-13 20:58:25,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:25,804 INFO L276 IsEmpty]: Start isEmpty. Operand 96069 states and 451818 transitions. [2021-07-13 20:58:26,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:58:26,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:26,368 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:58:26,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-13 20:58:26,568 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:58:26,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:58:26,568 INFO L82 PathProgramCache]: Analyzing trace with hash 498908106, now seen corresponding path program 17 times [2021-07-13 20:58:26,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:58:26,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877697208] [2021-07-13 20:58:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:58:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:58:26,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:58:26,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877697208] [2021-07-13 20:58:26,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877697208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:26,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777835357] [2021-07-13 20:58:26,626 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 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 [2021-07-13 20:58:26,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:58:26,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:58:26,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:58:26,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:58:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:58:26,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777835357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:26,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:58:26,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:58:26,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91304241] [2021-07-13 20:58:26,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:58:26,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:58:26,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:58:26,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:58:26,706 INFO L87 Difference]: Start difference. First operand 96069 states and 451818 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:27,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:27,657 INFO L93 Difference]: Finished difference Result 98062 states and 459589 transitions. [2021-07-13 20:58:27,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:58:27,657 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:58:27,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:28,360 INFO L225 Difference]: With dead ends: 98062 [2021-07-13 20:58:28,360 INFO L226 Difference]: Without dead ends: 97966 [2021-07-13 20:58:28,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:58:28,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97966 states. [2021-07-13 20:58:30,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97966 to 96093. [2021-07-13 20:58:30,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96093 states, 96092 states have (on average 4.7034716729800605) internal successors, (451966), 96092 states have internal predecessors, (451966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:31,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96093 states to 96093 states and 451966 transitions. [2021-07-13 20:58:31,306 INFO L78 Accepts]: Start accepts. Automaton has 96093 states and 451966 transitions. Word has length 25 [2021-07-13 20:58:31,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:31,307 INFO L482 AbstractCegarLoop]: Abstraction has 96093 states and 451966 transitions. [2021-07-13 20:58:31,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:31,307 INFO L276 IsEmpty]: Start isEmpty. Operand 96093 states and 451966 transitions. [2021-07-13 20:58:31,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:58:31,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:31,565 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:58:31,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:58:31,766 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:58:31,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:58:31,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1202930538, now seen corresponding path program 18 times [2021-07-13 20:58:31,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:58:31,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654033977] [2021-07-13 20:58:31,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:58:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:58:31,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:58:31,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654033977] [2021-07-13 20:58:31,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654033977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:31,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801593178] [2021-07-13 20:58:31,816 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 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 [2021-07-13 20:58:31,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:58:31,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:58:31,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:58:31,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:58:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:58:31,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801593178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:31,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:58:31,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:58:31,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482027002] [2021-07-13 20:58:31,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:58:31,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:58:31,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:58:31,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:58:31,872 INFO L87 Difference]: Start difference. First operand 96093 states and 451966 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:32,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:32,826 INFO L93 Difference]: Finished difference Result 98621 states and 461688 transitions. [2021-07-13 20:58:32,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:58:32,827 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:58:32,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:33,576 INFO L225 Difference]: With dead ends: 98621 [2021-07-13 20:58:33,576 INFO L226 Difference]: Without dead ends: 98525 [2021-07-13 20:58:33,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:58:33,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98525 states. [2021-07-13 20:58:35,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98525 to 96141. [2021-07-13 20:58:36,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96141 states, 96140 states have (on average 4.70395256916996) internal successors, (452238), 96140 states have internal predecessors, (452238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:37,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96141 states to 96141 states and 452238 transitions. [2021-07-13 20:58:37,020 INFO L78 Accepts]: Start accepts. Automaton has 96141 states and 452238 transitions. Word has length 25 [2021-07-13 20:58:37,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:37,020 INFO L482 AbstractCegarLoop]: Abstraction has 96141 states and 452238 transitions. [2021-07-13 20:58:37,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:37,020 INFO L276 IsEmpty]: Start isEmpty. Operand 96141 states and 452238 transitions. [2021-07-13 20:58:37,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:58:37,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:37,312 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:58:37,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:58:37,525 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:58:37,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:58:37,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1894658838, now seen corresponding path program 10 times [2021-07-13 20:58:37,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:58:37,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144523365] [2021-07-13 20:58:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:58:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:37,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:58:37,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144523365] [2021-07-13 20:58:37,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144523365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:37,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845797182] [2021-07-13 20:58:37,550 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:58:37,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:58:37,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:58:37,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:58:37,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:58:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:37,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845797182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:37,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:58:37,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 20:58:37,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147940211] [2021-07-13 20:58:37,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:58:37,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:58:37,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:58:37,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:58:37,620 INFO L87 Difference]: Start difference. First operand 96141 states and 452238 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-07-13 20:58:39,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:39,251 INFO L93 Difference]: Finished difference Result 107267 states and 496764 transitions. [2021-07-13 20:58:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:58:39,251 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:58:39,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:39,894 INFO L225 Difference]: With dead ends: 107267 [2021-07-13 20:58:39,894 INFO L226 Difference]: Without dead ends: 107165 [2021-07-13 20:58:39,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:58:40,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107165 states. [2021-07-13 20:58:42,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107165 to 96163. [2021-07-13 20:58:42,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96163 states, 96162 states have (on average 4.703042781972089) internal successors, (452254), 96162 states have internal predecessors, (452254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96163 states to 96163 states and 452254 transitions. [2021-07-13 20:58:43,232 INFO L78 Accepts]: Start accepts. Automaton has 96163 states and 452254 transitions. Word has length 25 [2021-07-13 20:58:43,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:43,233 INFO L482 AbstractCegarLoop]: Abstraction has 96163 states and 452254 transitions. [2021-07-13 20:58:43,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-07-13 20:58:43,233 INFO L276 IsEmpty]: Start isEmpty. Operand 96163 states and 452254 transitions. [2021-07-13 20:58:43,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:58:43,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:43,484 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:58:43,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:58:43,685 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:58:43,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:58:43,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1370737230, now seen corresponding path program 11 times [2021-07-13 20:58:43,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:58:43,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158827316] [2021-07-13 20:58:43,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:58:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:43,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:58:43,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158827316] [2021-07-13 20:58:43,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158827316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:43,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950269556] [2021-07-13 20:58:43,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:58:43,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:58:43,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:58:43,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:58:43,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:58:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:43,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950269556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:43,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:58:43,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 20:58:43,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410525053] [2021-07-13 20:58:43,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:58:43,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:58:43,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:58:43,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:58:43,776 INFO L87 Difference]: Start difference. First operand 96163 states and 452254 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-07-13 20:58:45,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:45,025 INFO L93 Difference]: Finished difference Result 105665 states and 492345 transitions. [2021-07-13 20:58:45,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:58:45,026 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 25 [2021-07-13 20:58:45,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:45,553 INFO L225 Difference]: With dead ends: 105665 [2021-07-13 20:58:45,553 INFO L226 Difference]: Without dead ends: 105515 [2021-07-13 20:58:45,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:58:45,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105515 states. [2021-07-13 20:58:47,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105515 to 100600. [2021-07-13 20:58:48,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100600 states, 100599 states have (on average 4.695384645970636) internal successors, (472351), 100599 states have internal predecessors, (472351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100600 states to 100600 states and 472351 transitions. [2021-07-13 20:58:49,011 INFO L78 Accepts]: Start accepts. Automaton has 100600 states and 472351 transitions. Word has length 25 [2021-07-13 20:58:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:49,011 INFO L482 AbstractCegarLoop]: Abstraction has 100600 states and 472351 transitions. [2021-07-13 20:58:49,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-07-13 20:58:49,012 INFO L276 IsEmpty]: Start isEmpty. Operand 100600 states and 472351 transitions. [2021-07-13 20:58:49,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:58:49,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:49,279 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:58:49,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:58:49,480 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:58:49,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:58:49,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1313736820, now seen corresponding path program 12 times [2021-07-13 20:58:49,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:58:49,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812019290] [2021-07-13 20:58:49,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:58:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:49,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:58:49,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812019290] [2021-07-13 20:58:49,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812019290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:49,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251586719] [2021-07-13 20:58:49,504 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 [2021-07-13 20:58:49,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:58:49,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:58:49,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:58:49,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:58:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:49,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251586719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:49,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:58:49,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:58:49,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169318445] [2021-07-13 20:58:49,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:58:49,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:58:49,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:58:49,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:58:49,573 INFO L87 Difference]: Start difference. First operand 100600 states and 472351 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-07-13 20:58:50,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:50,617 INFO L93 Difference]: Finished difference Result 103952 states and 485481 transitions. [2021-07-13 20:58:50,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:58:50,618 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 25 [2021-07-13 20:58:50,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:51,352 INFO L225 Difference]: With dead ends: 103952 [2021-07-13 20:58:51,352 INFO L226 Difference]: Without dead ends: 103908 [2021-07-13 20:58:51,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:58:51,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103908 states. [2021-07-13 20:58:53,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103908 to 100692. [2021-07-13 20:58:54,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100692 states, 100691 states have (on average 4.694391752986861) internal successors, (472683), 100691 states have internal predecessors, (472683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:54,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100692 states to 100692 states and 472683 transitions. [2021-07-13 20:58:54,542 INFO L78 Accepts]: Start accepts. Automaton has 100692 states and 472683 transitions. Word has length 25 [2021-07-13 20:58:54,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:54,542 INFO L482 AbstractCegarLoop]: Abstraction has 100692 states and 472683 transitions. [2021-07-13 20:58:54,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-07-13 20:58:54,542 INFO L276 IsEmpty]: Start isEmpty. Operand 100692 states and 472683 transitions. [2021-07-13 20:58:55,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:58:55,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:55,117 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:58:55,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:58:55,333 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:58:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:58:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash 812194570, now seen corresponding path program 13 times [2021-07-13 20:58:55,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:58:55,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979202] [2021-07-13 20:58:55,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:58:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:55,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:58:55,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979202] [2021-07-13 20:58:55,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:55,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099887301] [2021-07-13 20:58:55,351 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 [2021-07-13 20:58:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:55,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:58:55,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:58:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:55,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099887301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:55,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:58:55,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 20:58:55,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442241231] [2021-07-13 20:58:55,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:58:55,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:58:55,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:58:55,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:58:55,430 INFO L87 Difference]: Start difference. First operand 100692 states and 472683 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-07-13 20:58:56,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:56,851 INFO L93 Difference]: Finished difference Result 122378 states and 564861 transitions. [2021-07-13 20:58:56,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:58:56,868 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 25 [2021-07-13 20:58:56,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:58,016 INFO L225 Difference]: With dead ends: 122378 [2021-07-13 20:58:58,016 INFO L226 Difference]: Without dead ends: 120769 [2021-07-13 20:58:58,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:58:58,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120769 states. [2021-07-13 20:59:00,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120769 to 103273. [2021-07-13 20:59:00,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103273 states, 103272 states have (on average 4.6974688202029595) internal successors, (485117), 103272 states have internal predecessors, (485117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103273 states to 103273 states and 485117 transitions. [2021-07-13 20:59:01,737 INFO L78 Accepts]: Start accepts. Automaton has 103273 states and 485117 transitions. Word has length 25 [2021-07-13 20:59:01,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:59:01,737 INFO L482 AbstractCegarLoop]: Abstraction has 103273 states and 485117 transitions. [2021-07-13 20:59:01,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-07-13 20:59:01,737 INFO L276 IsEmpty]: Start isEmpty. Operand 103273 states and 485117 transitions. [2021-07-13 20:59:02,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:59:02,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:59:02,014 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:59:02,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-13 20:59:02,214 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:59:02,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:59:02,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1682717532, now seen corresponding path program 14 times [2021-07-13 20:59:02,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:59:02,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340479814] [2021-07-13 20:59:02,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:59:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:59:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:59:02,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:59:02,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340479814] [2021-07-13 20:59:02,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340479814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:02,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706284714] [2021-07-13 20:59:02,247 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 [2021-07-13 20:59:02,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:59:02,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:59:02,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:59:02,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:59:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:59:02,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706284714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:02,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:59:02,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:59:02,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245222445] [2021-07-13 20:59:02,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:59:02,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:59:02,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:59:02,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:59:02,317 INFO L87 Difference]: Start difference. First operand 103273 states and 485117 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-07-13 20:59:03,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:59:03,599 INFO L93 Difference]: Finished difference Result 106739 states and 498675 transitions. [2021-07-13 20:59:03,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:59:03,600 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:59:03,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:59:04,131 INFO L225 Difference]: With dead ends: 106739 [2021-07-13 20:59:04,131 INFO L226 Difference]: Without dead ends: 106655 [2021-07-13 20:59:04,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:59:04,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106655 states. [2021-07-13 20:59:06,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106655 to 103317. [2021-07-13 20:59:06,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103317 states, 103316 states have (on average 4.696697510550157) internal successors, (485244), 103316 states have internal predecessors, (485244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103317 states to 103317 states and 485244 transitions. [2021-07-13 20:59:07,659 INFO L78 Accepts]: Start accepts. Automaton has 103317 states and 485244 transitions. Word has length 25 [2021-07-13 20:59:07,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:59:07,659 INFO L482 AbstractCegarLoop]: Abstraction has 103317 states and 485244 transitions. [2021-07-13 20:59:07,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-07-13 20:59:07,659 INFO L276 IsEmpty]: Start isEmpty. Operand 103317 states and 485244 transitions. [2021-07-13 20:59:07,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:59:07,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:59:07,938 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:59:08,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-13 20:59:08,139 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:59:08,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:59:08,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1176441750, now seen corresponding path program 7 times [2021-07-13 20:59:08,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:59:08,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147190316] [2021-07-13 20:59:08,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:59:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:59:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:59:08,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:59:08,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147190316] [2021-07-13 20:59:08,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147190316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:08,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982737013] [2021-07-13 20:59:08,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:59:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:59:08,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:59:08,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:59:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:59:08,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982737013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:08,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:59:08,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:59:08,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021663293] [2021-07-13 20:59:08,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:59:08,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:59:08,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:59:08,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:59:08,230 INFO L87 Difference]: Start difference. First operand 103317 states and 485244 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:09,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:59:09,468 INFO L93 Difference]: Finished difference Result 105638 states and 494245 transitions. [2021-07-13 20:59:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:59:09,474 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:59:09,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:59:10,019 INFO L225 Difference]: With dead ends: 105638 [2021-07-13 20:59:10,019 INFO L226 Difference]: Without dead ends: 105538 [2021-07-13 20:59:10,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:59:10,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105538 states. [2021-07-13 20:59:12,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105538 to 103392. [2021-07-13 20:59:12,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103392 states, 103391 states have (on average 4.696830478474916) internal successors, (485610), 103391 states have internal predecessors, (485610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:13,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103392 states to 103392 states and 485610 transitions. [2021-07-13 20:59:13,171 INFO L78 Accepts]: Start accepts. Automaton has 103392 states and 485610 transitions. Word has length 25 [2021-07-13 20:59:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:59:13,171 INFO L482 AbstractCegarLoop]: Abstraction has 103392 states and 485610 transitions. [2021-07-13 20:59:13,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:13,171 INFO L276 IsEmpty]: Start isEmpty. Operand 103392 states and 485610 transitions. [2021-07-13 20:59:13,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:59:13,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:59:13,755 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:59:13,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-07-13 20:59:13,956 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:59:13,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:59:13,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1470680270, now seen corresponding path program 8 times [2021-07-13 20:59:13,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:59:13,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416941533] [2021-07-13 20:59:13,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:59:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:59:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:59:14,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:59:14,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416941533] [2021-07-13 20:59:14,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416941533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:14,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755147679] [2021-07-13 20:59:14,003 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:59:14,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:59:14,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:59:14,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:59:14,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:59:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:59:14,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755147679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:14,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:59:14,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:59:14,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532704896] [2021-07-13 20:59:14,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:59:14,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:59:14,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:59:14,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:59:14,071 INFO L87 Difference]: Start difference. First operand 103392 states and 485610 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:15,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:59:15,063 INFO L93 Difference]: Finished difference Result 105993 states and 495944 transitions. [2021-07-13 20:59:15,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:59:15,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:59:15,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:59:15,831 INFO L225 Difference]: With dead ends: 105993 [2021-07-13 20:59:15,831 INFO L226 Difference]: Without dead ends: 105893 [2021-07-13 20:59:15,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:59:15,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105893 states. [2021-07-13 20:59:18,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105893 to 103439. [2021-07-13 20:59:18,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103439 states, 103438 states have (on average 4.69710357895551) internal successors, (485859), 103438 states have internal predecessors, (485859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:19,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103439 states to 103439 states and 485859 transitions. [2021-07-13 20:59:19,063 INFO L78 Accepts]: Start accepts. Automaton has 103439 states and 485859 transitions. Word has length 25 [2021-07-13 20:59:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:59:19,063 INFO L482 AbstractCegarLoop]: Abstraction has 103439 states and 485859 transitions. [2021-07-13 20:59:19,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 103439 states and 485859 transitions. [2021-07-13 20:59:19,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:59:19,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:59:19,760 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:59:19,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-13 20:59:19,975 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:59:19,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:59:19,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1996714358, now seen corresponding path program 9 times [2021-07-13 20:59:19,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:59:19,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156517948] [2021-07-13 20:59:19,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:59:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:59:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:59:20,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:59:20,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156517948] [2021-07-13 20:59:20,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156517948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:20,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212991708] [2021-07-13 20:59:20,054 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 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 [2021-07-13 20:59:20,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:59:20,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:59:20,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:59:20,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:59:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:59:20,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212991708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:20,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:59:20,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:59:20,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909419122] [2021-07-13 20:59:20,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:59:20,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:59:20,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:59:20,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:59:20,119 INFO L87 Difference]: Start difference. First operand 103439 states and 485859 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:21,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:59:21,272 INFO L93 Difference]: Finished difference Result 104315 states and 489264 transitions. [2021-07-13 20:59:21,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:59:21,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:59:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:59:22,256 INFO L225 Difference]: With dead ends: 104315 [2021-07-13 20:59:22,257 INFO L226 Difference]: Without dead ends: 104239 [2021-07-13 20:59:22,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:59:22,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104239 states. [2021-07-13 20:59:24,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104239 to 103480. [2021-07-13 20:59:24,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103480 states, 103479 states have (on average 4.696981996347085) internal successors, (486039), 103479 states have internal predecessors, (486039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:25,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103480 states to 103480 states and 486039 transitions. [2021-07-13 20:59:25,475 INFO L78 Accepts]: Start accepts. Automaton has 103480 states and 486039 transitions. Word has length 25 [2021-07-13 20:59:25,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:59:25,475 INFO L482 AbstractCegarLoop]: Abstraction has 103480 states and 486039 transitions. [2021-07-13 20:59:25,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 103480 states and 486039 transitions. [2021-07-13 20:59:25,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:59:25,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:59:25,732 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:59:25,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-13 20:59:25,932 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:59:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:59:25,933 INFO L82 PathProgramCache]: Analyzing trace with hash -247614478, now seen corresponding path program 10 times [2021-07-13 20:59:25,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:59:25,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022558252] [2021-07-13 20:59:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:59:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:59:25,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:59:25,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:59:25,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022558252] [2021-07-13 20:59:25,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022558252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:25,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466473584] [2021-07-13 20:59:25,980 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:59:26,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:59:26,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:59:26,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:59:26,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:59:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:59:26,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466473584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:26,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:59:26,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:59:26,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191997828] [2021-07-13 20:59:26,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:59:26,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:59:26,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:59:26,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:59:26,050 INFO L87 Difference]: Start difference. First operand 103480 states and 486039 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:27,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:59:27,269 INFO L93 Difference]: Finished difference Result 104856 states and 491459 transitions. [2021-07-13 20:59:27,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:59:27,270 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:59:27,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:59:27,800 INFO L225 Difference]: With dead ends: 104856 [2021-07-13 20:59:27,800 INFO L226 Difference]: Without dead ends: 104768 [2021-07-13 20:59:27,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:59:27,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104768 states. [2021-07-13 20:59:30,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104768 to 103498. [2021-07-13 20:59:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103498 states, 103497 states have (on average 4.697083007236925) internal successors, (486134), 103497 states have internal predecessors, (486134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:31,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103498 states to 103498 states and 486134 transitions. [2021-07-13 20:59:31,240 INFO L78 Accepts]: Start accepts. Automaton has 103498 states and 486134 transitions. Word has length 25 [2021-07-13 20:59:31,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:59:31,240 INFO L482 AbstractCegarLoop]: Abstraction has 103498 states and 486134 transitions. [2021-07-13 20:59:31,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:31,240 INFO L276 IsEmpty]: Start isEmpty. Operand 103498 states and 486134 transitions. [2021-07-13 20:59:31,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:59:31,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:59:31,510 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:59:31,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:59:31,711 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:59:31,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:59:31,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1683892410, now seen corresponding path program 11 times [2021-07-13 20:59:31,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:59:31,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745866215] [2021-07-13 20:59:31,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:59:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:59:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:59:31,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:59:31,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745866215] [2021-07-13 20:59:31,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745866215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:31,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516172912] [2021-07-13 20:59:31,743 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 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 [2021-07-13 20:59:31,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:59:31,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:59:31,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:59:31,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:59:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:59:31,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516172912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:31,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:59:31,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:59:31,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918998039] [2021-07-13 20:59:31,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:59:31,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:59:31,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:59:31,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:59:31,797 INFO L87 Difference]: Start difference. First operand 103498 states and 486134 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:33,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:59:33,011 INFO L93 Difference]: Finished difference Result 105284 states and 493087 transitions. [2021-07-13 20:59:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:59:33,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:59:33,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:59:33,596 INFO L225 Difference]: With dead ends: 105284 [2021-07-13 20:59:33,596 INFO L226 Difference]: Without dead ends: 105184 [2021-07-13 20:59:33,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:59:33,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105184 states. [2021-07-13 20:59:36,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105184 to 103515. [2021-07-13 20:59:36,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103515 states, 103514 states have (on average 4.69741291033097) internal successors, (486248), 103514 states have internal predecessors, (486248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:37,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103515 states to 103515 states and 486248 transitions. [2021-07-13 20:59:37,105 INFO L78 Accepts]: Start accepts. Automaton has 103515 states and 486248 transitions. Word has length 25 [2021-07-13 20:59:37,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:59:37,105 INFO L482 AbstractCegarLoop]: Abstraction has 103515 states and 486248 transitions. [2021-07-13 20:59:37,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:37,105 INFO L276 IsEmpty]: Start isEmpty. Operand 103515 states and 486248 transitions. [2021-07-13 20:59:37,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:59:37,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:59:37,390 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:59:37,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:59:37,590 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:59:37,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:59:37,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1492192234, now seen corresponding path program 18 times [2021-07-13 20:59:37,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:59:37,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612406709] [2021-07-13 20:59:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:59:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:59:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:59:37,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:59:37,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612406709] [2021-07-13 20:59:37,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612406709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:37,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995866547] [2021-07-13 20:59:37,609 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 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 [2021-07-13 20:59:37,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:59:37,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:59:37,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:59:37,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:59:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:59:37,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995866547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:37,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:59:37,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-07-13 20:59:37,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319323889] [2021-07-13 20:59:37,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:59:37,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:59:37,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:59:37,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:59:37,670 INFO L87 Difference]: Start difference. First operand 103515 states and 486248 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-07-13 20:59:38,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:59:39,000 INFO L93 Difference]: Finished difference Result 118688 states and 551898 transitions. [2021-07-13 20:59:39,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:59:39,000 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:59:39,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:59:39,614 INFO L225 Difference]: With dead ends: 118688 [2021-07-13 20:59:39,615 INFO L226 Difference]: Without dead ends: 118688 [2021-07-13 20:59:39,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:59:39,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118688 states. [2021-07-13 20:59:42,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118688 to 105619. [2021-07-13 20:59:42,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105619 states, 105618 states have (on average 4.697987085534662) internal successors, (496192), 105618 states have internal predecessors, (496192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105619 states to 105619 states and 496192 transitions. [2021-07-13 20:59:43,625 INFO L78 Accepts]: Start accepts. Automaton has 105619 states and 496192 transitions. Word has length 25 [2021-07-13 20:59:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:59:43,625 INFO L482 AbstractCegarLoop]: Abstraction has 105619 states and 496192 transitions. [2021-07-13 20:59:43,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-07-13 20:59:43,625 INFO L276 IsEmpty]: Start isEmpty. Operand 105619 states and 496192 transitions. [2021-07-13 20:59:43,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:59:43,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:59:43,888 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:59:44,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:59:44,088 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:59:44,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:59:44,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1850358678, now seen corresponding path program 12 times [2021-07-13 20:59:44,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:59:44,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390145629] [2021-07-13 20:59:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:59:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:59:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:59:44,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:59:44,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390145629] [2021-07-13 20:59:44,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390145629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:44,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765173980] [2021-07-13 20:59:44,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:59:44,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:59:44,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:59:44,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:59:44,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:59:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:59:44,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765173980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:44,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:59:44,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:59:44,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810790169] [2021-07-13 20:59:44,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:59:44,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:59:44,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:59:44,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:59:44,205 INFO L87 Difference]: Start difference. First operand 105619 states and 496192 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:45,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:59:45,424 INFO L93 Difference]: Finished difference Result 108208 states and 506403 transitions. [2021-07-13 20:59:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:59:45,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:59:45,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:59:45,950 INFO L225 Difference]: With dead ends: 108208 [2021-07-13 20:59:45,950 INFO L226 Difference]: Without dead ends: 108108 [2021-07-13 20:59:45,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:59:46,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108108 states. [2021-07-13 20:59:48,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108108 to 105643. [2021-07-13 20:59:48,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105643 states, 105642 states have (on average 4.698443800761061) internal successors, (496353), 105642 states have internal predecessors, (496353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105643 states to 105643 states and 496353 transitions. [2021-07-13 20:59:49,381 INFO L78 Accepts]: Start accepts. Automaton has 105643 states and 496353 transitions. Word has length 25 [2021-07-13 20:59:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:59:49,381 INFO L482 AbstractCegarLoop]: Abstraction has 105643 states and 496353 transitions. [2021-07-13 20:59:49,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:49,381 INFO L276 IsEmpty]: Start isEmpty. Operand 105643 states and 496353 transitions. [2021-07-13 20:59:49,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:59:49,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:59:49,643 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:59:49,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:59:49,843 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:59:49,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:59:49,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1617035950, now seen corresponding path program 13 times [2021-07-13 20:59:49,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:59:49,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183420212] [2021-07-13 20:59:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:59:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:59:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:59:49,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:59:49,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183420212] [2021-07-13 20:59:49,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183420212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:49,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44315967] [2021-07-13 20:59:49,896 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 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 [2021-07-13 20:59:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:59:49,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:59:49,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:59:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:59:50,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44315967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:50,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:59:50,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:59:50,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120823460] [2021-07-13 20:59:50,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:59:50,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:59:50,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:59:50,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:59:50,220 INFO L87 Difference]: Start difference. First operand 105643 states and 496353 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:51,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:59:51,193 INFO L93 Difference]: Finished difference Result 108139 states and 506170 transitions. [2021-07-13 20:59:51,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:59:51,194 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:59:51,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:59:51,726 INFO L225 Difference]: With dead ends: 108139 [2021-07-13 20:59:51,726 INFO L226 Difference]: Without dead ends: 108063 [2021-07-13 20:59:51,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:59:52,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108063 states. [2021-07-13 20:59:54,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108063 to 105670. [2021-07-13 20:59:54,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105670 states, 105669 states have (on average 4.69866280555319) internal successors, (496503), 105669 states have internal predecessors, (496503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:55,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105670 states to 105670 states and 496503 transitions. [2021-07-13 20:59:55,131 INFO L78 Accepts]: Start accepts. Automaton has 105670 states and 496503 transitions. Word has length 25 [2021-07-13 20:59:55,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:59:55,131 INFO L482 AbstractCegarLoop]: Abstraction has 105670 states and 496503 transitions. [2021-07-13 20:59:55,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:55,131 INFO L276 IsEmpty]: Start isEmpty. Operand 105670 states and 496503 transitions. [2021-07-13 20:59:55,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:59:55,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:59:55,394 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:59:55,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:59:55,601 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:59:55,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:59:55,601 INFO L82 PathProgramCache]: Analyzing trace with hash 132063930, now seen corresponding path program 14 times [2021-07-13 20:59:55,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:59:55,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771024658] [2021-07-13 20:59:55,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:59:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:59:55,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:59:55,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:59:55,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771024658] [2021-07-13 20:59:55,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771024658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:55,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601164895] [2021-07-13 20:59:55,660 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 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 [2021-07-13 20:59:55,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:59:55,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:59:55,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:59:55,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:59:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:59:56,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601164895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:56,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:59:56,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:59:56,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293598508] [2021-07-13 20:59:56,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:59:56,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:59:56,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:59:56,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:59:56,038 INFO L87 Difference]: Start difference. First operand 105670 states and 496503 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:56,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:59:56,982 INFO L93 Difference]: Finished difference Result 107419 states and 503279 transitions. [2021-07-13 20:59:56,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:59:56,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:59:56,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:59:57,511 INFO L225 Difference]: With dead ends: 107419 [2021-07-13 20:59:57,511 INFO L226 Difference]: Without dead ends: 107331 [2021-07-13 20:59:57,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:59:57,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107331 states. [2021-07-13 20:59:59,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107331 to 105677. [2021-07-13 21:00:00,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105677 states, 105676 states have (on average 4.698938264128089) internal successors, (496565), 105676 states have internal predecessors, (496565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:00,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105677 states to 105677 states and 496565 transitions. [2021-07-13 21:00:00,874 INFO L78 Accepts]: Start accepts. Automaton has 105677 states and 496565 transitions. Word has length 25 [2021-07-13 21:00:00,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 21:00:00,874 INFO L482 AbstractCegarLoop]: Abstraction has 105677 states and 496565 transitions. [2021-07-13 21:00:00,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:00,874 INFO L276 IsEmpty]: Start isEmpty. Operand 105677 states and 496565 transitions. [2021-07-13 21:00:01,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 21:00:01,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 21:00:01,141 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 21:00:01,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-13 21:00:01,342 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 21:00:01,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 21:00:01,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1826075754, now seen corresponding path program 15 times [2021-07-13 21:00:01,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 21:00:01,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312799388] [2021-07-13 21:00:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 21:00:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 21:00:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 21:00:01,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 21:00:01,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312799388] [2021-07-13 21:00:01,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312799388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:00:01,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182671856] [2021-07-13 21:00:01,383 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 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 [2021-07-13 21:00:01,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 21:00:01,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 21:00:01,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 21:00:01,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 21:00:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 21:00:01,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182671856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:00:01,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 21:00:01,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 21:00:01,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571638414] [2021-07-13 21:00:01,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 21:00:01,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 21:00:01,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 21:00:01,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 21:00:01,773 INFO L87 Difference]: Start difference. First operand 105677 states and 496565 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:02,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 21:00:02,904 INFO L93 Difference]: Finished difference Result 108226 states and 506520 transitions. [2021-07-13 21:00:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 21:00:02,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 21:00:02,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 21:00:03,950 INFO L225 Difference]: With dead ends: 108226 [2021-07-13 21:00:03,950 INFO L226 Difference]: Without dead ends: 108150 [2021-07-13 21:00:03,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 21:00:04,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108150 states. [2021-07-13 21:00:06,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108150 to 105719. [2021-07-13 21:00:06,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105719 states, 105718 states have (on average 4.699351103880134) internal successors, (496806), 105718 states have internal predecessors, (496806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:07,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105719 states to 105719 states and 496806 transitions. [2021-07-13 21:00:07,711 INFO L78 Accepts]: Start accepts. Automaton has 105719 states and 496806 transitions. Word has length 25 [2021-07-13 21:00:07,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 21:00:07,711 INFO L482 AbstractCegarLoop]: Abstraction has 105719 states and 496806 transitions. [2021-07-13 21:00:07,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:07,711 INFO L276 IsEmpty]: Start isEmpty. Operand 105719 states and 496806 transitions. [2021-07-13 21:00:08,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 21:00:08,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 21:00:08,014 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 21:00:08,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-13 21:00:08,215 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 21:00:08,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 21:00:08,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1125159402, now seen corresponding path program 16 times [2021-07-13 21:00:08,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 21:00:08,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773468137] [2021-07-13 21:00:08,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 21:00:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 21:00:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 21:00:08,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 21:00:08,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773468137] [2021-07-13 21:00:08,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773468137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:00:08,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015885940] [2021-07-13 21:00:08,268 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 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 [2021-07-13 21:00:08,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 21:00:08,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 21:00:08,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 21:00:08,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 21:00:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 21:00:08,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015885940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:00:08,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 21:00:08,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 21:00:08,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828287998] [2021-07-13 21:00:08,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 21:00:08,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 21:00:08,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 21:00:08,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 21:00:08,326 INFO L87 Difference]: Start difference. First operand 105719 states and 496806 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:09,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 21:00:09,631 INFO L93 Difference]: Finished difference Result 107874 states and 505312 transitions. [2021-07-13 21:00:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 21:00:09,641 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 21:00:09,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 21:00:10,207 INFO L225 Difference]: With dead ends: 107874 [2021-07-13 21:00:10,208 INFO L226 Difference]: Without dead ends: 107798 [2021-07-13 21:00:10,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 21:00:10,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107798 states. [2021-07-13 21:00:13,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107798 to 105741. [2021-07-13 21:00:13,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105741 states, 105740 states have (on average 4.69966899943257) internal successors, (496943), 105740 states have internal predecessors, (496943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105741 states to 105741 states and 496943 transitions. [2021-07-13 21:00:14,124 INFO L78 Accepts]: Start accepts. Automaton has 105741 states and 496943 transitions. Word has length 25 [2021-07-13 21:00:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 21:00:14,124 INFO L482 AbstractCegarLoop]: Abstraction has 105741 states and 496943 transitions. [2021-07-13 21:00:14,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand 105741 states and 496943 transitions. [2021-07-13 21:00:14,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 21:00:14,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 21:00:14,428 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 21:00:14,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 21:00:14,629 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 21:00:14,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 21:00:14,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1420708014, now seen corresponding path program 17 times [2021-07-13 21:00:14,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 21:00:14,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891335372] [2021-07-13 21:00:14,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 21:00:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 21:00:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 21:00:14,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 21:00:14,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891335372] [2021-07-13 21:00:14,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891335372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:00:14,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797317435] [2021-07-13 21:00:14,686 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 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 [2021-07-13 21:00:14,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 21:00:14,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 21:00:14,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 21:00:14,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 21:00:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 21:00:14,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797317435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:00:14,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 21:00:14,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 21:00:14,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956850087] [2021-07-13 21:00:14,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 21:00:14,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 21:00:14,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 21:00:14,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 21:00:14,749 INFO L87 Difference]: Start difference. First operand 105741 states and 496943 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 21:00:16,098 INFO L93 Difference]: Finished difference Result 107237 states and 502736 transitions. [2021-07-13 21:00:16,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 21:00:16,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 21:00:16,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 21:00:16,712 INFO L225 Difference]: With dead ends: 107237 [2021-07-13 21:00:16,712 INFO L226 Difference]: Without dead ends: 107149 [2021-07-13 21:00:16,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 21:00:16,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107149 states. [2021-07-13 21:00:19,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107149 to 105752. [2021-07-13 21:00:19,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105752 states, 105751 states have (on average 4.699946099800474) internal successors, (497024), 105751 states have internal predecessors, (497024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:20,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105752 states to 105752 states and 497024 transitions. [2021-07-13 21:00:20,533 INFO L78 Accepts]: Start accepts. Automaton has 105752 states and 497024 transitions. Word has length 25 [2021-07-13 21:00:20,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 21:00:20,533 INFO L482 AbstractCegarLoop]: Abstraction has 105752 states and 497024 transitions. [2021-07-13 21:00:20,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:20,533 INFO L276 IsEmpty]: Start isEmpty. Operand 105752 states and 497024 transitions. [2021-07-13 21:00:20,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 21:00:20,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 21:00:20,842 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 21:00:21,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-13 21:00:21,042 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 21:00:21,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 21:00:21,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1658453014, now seen corresponding path program 19 times [2021-07-13 21:00:21,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 21:00:21,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600610219] [2021-07-13 21:00:21,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 21:00:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 21:00:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 21:00:21,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 21:00:21,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600610219] [2021-07-13 21:00:21,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600610219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:00:21,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726447933] [2021-07-13 21:00:21,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 21:00:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 21:00:21,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 21:00:21,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 21:00:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 21:00:21,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726447933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:00:21,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 21:00:21,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-13 21:00:21,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448301715] [2021-07-13 21:00:21,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 21:00:21,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 21:00:21,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 21:00:21,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 21:00:21,156 INFO L87 Difference]: Start difference. First operand 105752 states and 497024 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-07-13 21:00:22,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 21:00:22,763 INFO L93 Difference]: Finished difference Result 148546 states and 685984 transitions. [2021-07-13 21:00:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 21:00:22,763 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 21:00:22,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 21:00:23,850 INFO L225 Difference]: With dead ends: 148546 [2021-07-13 21:00:23,851 INFO L226 Difference]: Without dead ends: 147281 [2021-07-13 21:00:23,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-07-13 21:00:24,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147281 states. [2021-07-13 21:00:27,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147281 to 117058. [2021-07-13 21:00:27,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117058 states, 117057 states have (on average 4.7037169925762665) internal successors, (550603), 117057 states have internal predecessors, (550603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117058 states to 117058 states and 550603 transitions. [2021-07-13 21:00:28,264 INFO L78 Accepts]: Start accepts. Automaton has 117058 states and 550603 transitions. Word has length 25 [2021-07-13 21:00:28,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 21:00:28,264 INFO L482 AbstractCegarLoop]: Abstraction has 117058 states and 550603 transitions. [2021-07-13 21:00:28,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-07-13 21:00:28,264 INFO L276 IsEmpty]: Start isEmpty. Operand 117058 states and 550603 transitions. [2021-07-13 21:00:29,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 21:00:29,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 21:00:29,105 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 21:00:29,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 21:00:29,321 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 21:00:29,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 21:00:29,321 INFO L82 PathProgramCache]: Analyzing trace with hash 208727758, now seen corresponding path program 20 times [2021-07-13 21:00:29,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 21:00:29,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259696930] [2021-07-13 21:00:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 21:00:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 21:00:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 21:00:29,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 21:00:29,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259696930] [2021-07-13 21:00:29,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259696930] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 21:00:29,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 21:00:29,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 21:00:29,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353734820] [2021-07-13 21:00:29,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 21:00:29,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 21:00:29,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 21:00:29,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 21:00:29,346 INFO L87 Difference]: Start difference. First operand 117058 states and 550603 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:30,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 21:00:30,822 INFO L93 Difference]: Finished difference Result 128713 states and 600066 transitions. [2021-07-13 21:00:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 21:00:30,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 21:00:30,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 21:00:32,148 INFO L225 Difference]: With dead ends: 128713 [2021-07-13 21:00:32,149 INFO L226 Difference]: Without dead ends: 128713 [2021-07-13 21:00:32,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-13 21:00:32,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128713 states. [2021-07-13 21:00:35,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128713 to 117168. [2021-07-13 21:00:35,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117168 states, 117167 states have (on average 4.7038500601705255) internal successors, (551136), 117167 states have internal predecessors, (551136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:36,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117168 states to 117168 states and 551136 transitions. [2021-07-13 21:00:36,200 INFO L78 Accepts]: Start accepts. Automaton has 117168 states and 551136 transitions. Word has length 25 [2021-07-13 21:00:36,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 21:00:36,200 INFO L482 AbstractCegarLoop]: Abstraction has 117168 states and 551136 transitions. [2021-07-13 21:00:36,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:36,200 INFO L276 IsEmpty]: Start isEmpty. Operand 117168 states and 551136 transitions. [2021-07-13 21:00:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 21:00:36,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 21:00:36,854 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 21:00:36,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-07-13 21:00:36,854 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 21:00:36,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 21:00:36,854 INFO L82 PathProgramCache]: Analyzing trace with hash 537875814, now seen corresponding path program 18 times [2021-07-13 21:00:36,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 21:00:36,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033951862] [2021-07-13 21:00:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 21:00:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 21:00:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 21:00:36,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 21:00:36,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033951862] [2021-07-13 21:00:36,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033951862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:00:36,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744242743] [2021-07-13 21:00:36,901 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 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 [2021-07-13 21:00:36,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 21:00:36,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 21:00:36,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 21:00:36,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 21:00:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 21:00:36,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744242743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:00:36,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 21:00:36,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 21:00:36,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023776513] [2021-07-13 21:00:36,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 21:00:36,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 21:00:36,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 21:00:36,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 21:00:36,968 INFO L87 Difference]: Start difference. First operand 117168 states and 551136 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:38,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 21:00:38,128 INFO L93 Difference]: Finished difference Result 119473 states and 560252 transitions. [2021-07-13 21:00:38,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 21:00:38,128 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 21:00:38,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 21:00:39,095 INFO L225 Difference]: With dead ends: 119473 [2021-07-13 21:00:39,095 INFO L226 Difference]: Without dead ends: 119373 [2021-07-13 21:00:39,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 21:00:39,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119373 states. [2021-07-13 21:00:42,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119373 to 117184. [2021-07-13 21:00:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117184 states, 117183 states have (on average 4.7040782366042855) internal successors, (551238), 117183 states have internal predecessors, (551238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:43,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117184 states to 117184 states and 551238 transitions. [2021-07-13 21:00:43,142 INFO L78 Accepts]: Start accepts. Automaton has 117184 states and 551238 transitions. Word has length 25 [2021-07-13 21:00:43,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 21:00:43,142 INFO L482 AbstractCegarLoop]: Abstraction has 117184 states and 551238 transitions. [2021-07-13 21:00:43,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:43,142 INFO L276 IsEmpty]: Start isEmpty. Operand 117184 states and 551238 transitions. [2021-07-13 21:00:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 21:00:43,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 21:00:43,476 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 21:00:43,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 21:00:43,677 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 21:00:43,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 21:00:43,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1365448482, now seen corresponding path program 19 times [2021-07-13 21:00:43,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 21:00:43,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011505805] [2021-07-13 21:00:43,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 21:00:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 21:00:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 21:00:43,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 21:00:43,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011505805] [2021-07-13 21:00:43,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011505805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:00:43,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786249549] [2021-07-13 21:00:43,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 21:00:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 21:00:43,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 21:00:43,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 21:00:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 21:00:43,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786249549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:00:43,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 21:00:43,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 21:00:43,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512965723] [2021-07-13 21:00:43,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 21:00:43,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 21:00:43,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 21:00:43,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 21:00:43,812 INFO L87 Difference]: Start difference. First operand 117184 states and 551238 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:45,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 21:00:45,196 INFO L93 Difference]: Finished difference Result 118219 states and 555230 transitions. [2021-07-13 21:00:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 21:00:45,196 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 21:00:45,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 21:00:46,110 INFO L225 Difference]: With dead ends: 118219 [2021-07-13 21:00:46,110 INFO L226 Difference]: Without dead ends: 118143 [2021-07-13 21:00:46,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 21:00:46,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118143 states. [2021-07-13 21:00:48,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118143 to 117194. [2021-07-13 21:00:49,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117194 states, 117193 states have (on average 4.7041034874096574) internal successors, (551288), 117193 states have internal predecessors, (551288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117194 states to 117194 states and 551288 transitions. [2021-07-13 21:00:50,195 INFO L78 Accepts]: Start accepts. Automaton has 117194 states and 551288 transitions. Word has length 25 [2021-07-13 21:00:50,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 21:00:50,196 INFO L482 AbstractCegarLoop]: Abstraction has 117194 states and 551288 transitions. [2021-07-13 21:00:50,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:50,196 INFO L276 IsEmpty]: Start isEmpty. Operand 117194 states and 551288 transitions. [2021-07-13 21:00:50,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 21:00:50,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 21:00:50,795 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 21:00:51,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-07-13 21:00:51,012 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 21:00:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 21:00:51,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1180418934, now seen corresponding path program 20 times [2021-07-13 21:00:51,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 21:00:51,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217868768] [2021-07-13 21:00:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 21:00:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 21:00:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 21:00:51,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 21:00:51,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217868768] [2021-07-13 21:00:51,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217868768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:00:51,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159593400] [2021-07-13 21:00:51,074 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 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 [2021-07-13 21:00:51,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 21:00:51,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 21:00:51,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 21:00:51,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 21:00:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 21:00:51,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159593400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:00:51,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 21:00:51,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 21:00:51,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068135845] [2021-07-13 21:00:51,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 21:00:51,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 21:00:51,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 21:00:51,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 21:00:51,162 INFO L87 Difference]: Start difference. First operand 117194 states and 551288 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:52,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 21:00:52,850 INFO L93 Difference]: Finished difference Result 118548 states and 556592 transitions. [2021-07-13 21:00:52,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 21:00:52,850 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 21:00:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 21:00:53,903 INFO L225 Difference]: With dead ends: 118548 [2021-07-13 21:00:53,903 INFO L226 Difference]: Without dead ends: 118460 [2021-07-13 21:00:53,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 21:00:54,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118460 states. [2021-07-13 21:00:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118460 to 117198. [2021-07-13 21:00:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117198 states, 117197 states have (on average 4.70423304350794) internal successors, (551322), 117197 states have internal predecessors, (551322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117198 states to 117198 states and 551322 transitions. [2021-07-13 21:00:57,721 INFO L78 Accepts]: Start accepts. Automaton has 117198 states and 551322 transitions. Word has length 25 [2021-07-13 21:00:57,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 21:00:57,721 INFO L482 AbstractCegarLoop]: Abstraction has 117198 states and 551322 transitions. [2021-07-13 21:00:57,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:57,721 INFO L276 IsEmpty]: Start isEmpty. Operand 117198 states and 551322 transitions. [2021-07-13 21:00:58,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 21:00:58,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 21:00:58,379 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 21:00:58,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 21:00:58,579 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 21:00:58,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 21:00:58,579 INFO L82 PathProgramCache]: Analyzing trace with hash 751087954, now seen corresponding path program 21 times [2021-07-13 21:00:58,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 21:00:58,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884257213] [2021-07-13 21:00:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 21:00:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 21:00:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 21:00:58,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 21:00:58,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884257213] [2021-07-13 21:00:58,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884257213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:00:58,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747646087] [2021-07-13 21:00:58,611 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 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 [2021-07-13 21:00:58,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 21:00:58,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 21:00:58,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 21:00:58,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 21:00:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 21:00:58,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747646087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:00:58,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 21:00:58,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 21:00:58,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728010856] [2021-07-13 21:00:58,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 21:00:58,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 21:00:58,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 21:00:58,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 21:00:58,674 INFO L87 Difference]: Start difference. First operand 117198 states and 551322 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:00:59,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 21:00:59,771 INFO L93 Difference]: Finished difference Result 118753 states and 557336 transitions. [2021-07-13 21:00:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 21:00:59,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 21:00:59,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 21:01:00,609 INFO L225 Difference]: With dead ends: 118753 [2021-07-13 21:01:00,609 INFO L226 Difference]: Without dead ends: 118653 [2021-07-13 21:01:00,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 21:01:00,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118653 states. [2021-07-13 21:01:03,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118653 to 117200. [2021-07-13 21:01:03,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117200 states, 117199 states have (on average 4.704528195633069) internal successors, (551366), 117199 states have internal predecessors, (551366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:01:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117200 states to 117200 states and 551366 transitions. [2021-07-13 21:01:04,513 INFO L78 Accepts]: Start accepts. Automaton has 117200 states and 551366 transitions. Word has length 25 [2021-07-13 21:01:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 21:01:04,513 INFO L482 AbstractCegarLoop]: Abstraction has 117200 states and 551366 transitions. [2021-07-13 21:01:04,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:01:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 117200 states and 551366 transitions. [2021-07-13 21:01:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 21:01:04,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 21:01:04,839 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 21:01:05,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 21:01:05,039 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 21:01:05,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 21:01:05,040 INFO L82 PathProgramCache]: Analyzing trace with hash -166258994, now seen corresponding path program 19 times [2021-07-13 21:01:05,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 21:01:05,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437113979] [2021-07-13 21:01:05,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 21:01:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 21:01:05,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 21:01:05,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 21:01:05,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437113979] [2021-07-13 21:01:05,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437113979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:01:05,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797136553] [2021-07-13 21:01:05,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 21:01:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 21:01:05,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 21:01:05,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 21:01:05,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 21:01:05,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797136553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:01:05,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 21:01:05,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 21:01:05,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108824783] [2021-07-13 21:01:05,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 21:01:05,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 21:01:05,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 21:01:05,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 21:01:05,391 INFO L87 Difference]: Start difference. First operand 117200 states and 551366 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-07-13 21:01:07,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 21:01:07,012 INFO L93 Difference]: Finished difference Result 147548 states and 688527 transitions. [2021-07-13 21:01:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 21:01:07,013 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 27 [2021-07-13 21:01:07,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 21:01:07,820 INFO L225 Difference]: With dead ends: 147548 [2021-07-13 21:01:07,821 INFO L226 Difference]: Without dead ends: 146423 [2021-07-13 21:01:07,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-07-13 21:01:08,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146423 states. [2021-07-13 21:01:12,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146423 to 133054. [2021-07-13 21:01:12,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133054 states, 133053 states have (on average 4.703276138080314) internal successors, (625785), 133053 states have internal predecessors, (625785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:01:13,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133054 states to 133054 states and 625785 transitions. [2021-07-13 21:01:13,339 INFO L78 Accepts]: Start accepts. Automaton has 133054 states and 625785 transitions. Word has length 27 [2021-07-13 21:01:13,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 21:01:13,339 INFO L482 AbstractCegarLoop]: Abstraction has 133054 states and 625785 transitions. [2021-07-13 21:01:13,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-07-13 21:01:13,339 INFO L276 IsEmpty]: Start isEmpty. Operand 133054 states and 625785 transitions. [2021-07-13 21:01:13,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 21:01:13,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 21:01:13,720 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 21:01:13,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-13 21:01:13,921 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 21:01:13,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 21:01:13,921 INFO L82 PathProgramCache]: Analyzing trace with hash 932861774, now seen corresponding path program 21 times [2021-07-13 21:01:13,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 21:01:13,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77690954] [2021-07-13 21:01:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 21:01:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 21:01:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 21:01:13,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 21:01:13,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77690954] [2021-07-13 21:01:13,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77690954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:01:13,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594362129] [2021-07-13 21:01:13,944 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 [2021-07-13 21:01:13,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 21:01:13,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 21:01:13,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 21:01:13,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 21:01:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 21:01:14,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594362129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:01:14,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 21:01:14,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 21:01:14,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392823998] [2021-07-13 21:01:14,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 21:01:14,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 21:01:14,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 21:01:14,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 21:01:14,026 INFO L87 Difference]: Start difference. First operand 133054 states and 625785 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-07-13 21:01:15,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 21:01:15,678 INFO L93 Difference]: Finished difference Result 144228 states and 674583 transitions. [2021-07-13 21:01:15,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 21:01:15,678 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 27 [2021-07-13 21:01:15,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 21:01:16,753 INFO L225 Difference]: With dead ends: 144228 [2021-07-13 21:01:16,753 INFO L226 Difference]: Without dead ends: 144058 [2021-07-13 21:01:16,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-07-13 21:01:16,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144058 states. [2021-07-13 21:01:20,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144058 to 121212. [2021-07-13 21:01:20,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121212 states, 121211 states have (on average 4.70567852752638) internal successors, (570380), 121211 states have internal predecessors, (570380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:01:21,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121212 states to 121212 states and 570380 transitions. [2021-07-13 21:01:21,319 INFO L78 Accepts]: Start accepts. Automaton has 121212 states and 570380 transitions. Word has length 27 [2021-07-13 21:01:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 21:01:21,319 INFO L482 AbstractCegarLoop]: Abstraction has 121212 states and 570380 transitions. [2021-07-13 21:01:21,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-07-13 21:01:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 121212 states and 570380 transitions. [2021-07-13 21:01:21,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 21:01:21,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 21:01:21,664 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 21:01:21,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-13 21:01:21,865 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 21:01:21,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 21:01:21,865 INFO L82 PathProgramCache]: Analyzing trace with hash -184507126, now seen corresponding path program 22 times [2021-07-13 21:01:21,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 21:01:21,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586625472] [2021-07-13 21:01:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 21:01:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 21:01:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 21:01:21,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 21:01:21,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586625472] [2021-07-13 21:01:21,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586625472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:01:21,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862275004] [2021-07-13 21:01:21,887 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 [2021-07-13 21:01:21,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 21:01:21,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 21:01:21,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 21:01:21,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 21:01:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 21:01:21,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862275004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:01:21,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 21:01:21,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 21:01:21,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131953673] [2021-07-13 21:01:21,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 21:01:21,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 21:01:21,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 21:01:21,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-13 21:01:21,966 INFO L87 Difference]: Start difference. First operand 121212 states and 570380 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-07-13 21:01:23,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 21:01:23,530 INFO L93 Difference]: Finished difference Result 142703 states and 667037 transitions. [2021-07-13 21:01:23,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 21:01:23,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 27 [2021-07-13 21:01:23,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 21:01:24,561 INFO L225 Difference]: With dead ends: 142703 [2021-07-13 21:01:24,561 INFO L226 Difference]: Without dead ends: 142461 [2021-07-13 21:01:24,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-07-13 21:01:24,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142461 states. [2021-07-13 21:01:27,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142461 to 121815. [2021-07-13 21:01:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121815 states, 121814 states have (on average 4.707701906184839) internal successors, (573464), 121814 states have internal predecessors, (573464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:01:28,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121815 states to 121815 states and 573464 transitions. [2021-07-13 21:01:28,798 INFO L78 Accepts]: Start accepts. Automaton has 121815 states and 573464 transitions. Word has length 27 [2021-07-13 21:01:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 21:01:28,798 INFO L482 AbstractCegarLoop]: Abstraction has 121815 states and 573464 transitions. [2021-07-13 21:01:28,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-07-13 21:01:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 121815 states and 573464 transitions. [2021-07-13 21:01:29,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 21:01:29,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 21:01:29,522 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 21:01:29,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-13 21:01:29,732 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 21:01:29,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 21:01:29,732 INFO L82 PathProgramCache]: Analyzing trace with hash 625965006, now seen corresponding path program 9 times [2021-07-13 21:01:29,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 21:01:29,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343308660] [2021-07-13 21:01:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 21:01:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 21:01:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 21:01:29,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 21:01:29,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343308660] [2021-07-13 21:01:29,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343308660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:01:29,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250226416] [2021-07-13 21:01:29,777 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 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 [2021-07-13 21:01:29,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 21:01:29,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 21:01:29,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 21:01:29,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 21:01:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 21:01:29,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250226416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:01:29,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 21:01:29,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 21:01:29,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132381992] [2021-07-13 21:01:29,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 21:01:29,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 21:01:29,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 21:01:29,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 21:01:29,851 INFO L87 Difference]: Start difference. First operand 121815 states and 573464 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-07-13 21:01:31,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 21:01:31,434 INFO L93 Difference]: Finished difference Result 123705 states and 580618 transitions. [2021-07-13 21:01:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 21:01:31,457 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 27 [2021-07-13 21:01:31,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 21:01:32,469 INFO L225 Difference]: With dead ends: 123705 [2021-07-13 21:01:32,469 INFO L226 Difference]: Without dead ends: 123623 [2021-07-13 21:01:32,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 21:01:32,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123623 states. [2021-07-13 21:01:35,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123623 to 121965. [2021-07-13 21:01:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121965 states, 121964 states have (on average 4.707438260470303) internal successors, (574138), 121964 states have internal predecessors, (574138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 21:01:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121965 states to 121965 states and 574138 transitions. [2021-07-13 21:01:36,556 INFO L78 Accepts]: Start accepts. Automaton has 121965 states and 574138 transitions. Word has length 27 [2021-07-13 21:01:36,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 21:01:36,556 INFO L482 AbstractCegarLoop]: Abstraction has 121965 states and 574138 transitions. [2021-07-13 21:01:36,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-07-13 21:01:36,557 INFO L276 IsEmpty]: Start isEmpty. Operand 121965 states and 574138 transitions. [2021-07-13 21:01:37,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 21:01:37,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 21:01:37,306 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 21:01:37,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 21:01:37,521 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 21:01:37,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 21:01:37,521 INFO L82 PathProgramCache]: Analyzing trace with hash 871441812, now seen corresponding path program 10 times [2021-07-13 21:01:37,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 21:01:37,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525946680] [2021-07-13 21:01:37,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 21:01:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 21:01:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 21:01:37,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 21:01:37,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525946680] [2021-07-13 21:01:37,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525946680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:01:37,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537552701] [2021-07-13 21:01:37,580 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 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 [2021-07-13 21:01:37,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 21:01:37,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 21:01:37,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 21:01:37,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 21:01:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 21:01:37,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537552701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 21:01:37,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 21:01:37,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 21:01:37,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385271531] [2021-07-13 21:01:37,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 21:01:37,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 21:01:37,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 21:01:37,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 21:01:37,645 INFO L87 Difference]: Start difference. First operand 121965 states and 574138 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) Received shutdown request... [2021-07-13 21:01:39,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 21:01:39,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-13 21:01:39,218 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 21:01:39,221 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 21:01:39,222 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 21:01:39,223 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 09:01:39 BasicIcfg [2021-07-13 21:01:39,223 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 21:01:39,223 INFO L168 Benchmark]: Toolchain (without parser) took 610374.33 ms. Allocated memory was 185.6 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 165.5 MB in the beginning and 6.0 GB in the end (delta: -5.8 GB). Peak memory consumption was 2.0 GB. Max. memory is 8.0 GB. [2021-07-13 21:01:39,223 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 185.6 MB. Free memory is still 166.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 21:01:39,223 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.32 ms. Allocated memory is still 185.6 MB. Free memory was 165.4 MB in the beginning and 163.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 21:01:39,223 INFO L168 Benchmark]: Boogie Preprocessor took 10.92 ms. Allocated memory is still 185.6 MB. Free memory was 163.9 MB in the beginning and 162.9 MB in the end (delta: 964.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 21:01:39,223 INFO L168 Benchmark]: RCFGBuilder took 250.16 ms. Allocated memory is still 185.6 MB. Free memory was 162.9 MB in the beginning and 149.2 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-07-13 21:01:39,224 INFO L168 Benchmark]: TraceAbstraction took 610088.86 ms. Allocated memory was 185.6 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 148.7 MB in the beginning and 6.0 GB in the end (delta: -5.9 GB). Peak memory consumption was 2.0 GB. Max. memory is 8.0 GB. [2021-07-13 21:01:39,224 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 0.09 ms. Allocated memory is still 185.6 MB. Free memory is still 166.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 17.32 ms. Allocated memory is still 185.6 MB. Free memory was 165.4 MB in the beginning and 163.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 10.92 ms. Allocated memory is still 185.6 MB. Free memory was 163.9 MB in the beginning and 162.9 MB in the end (delta: 964.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 250.16 ms. Allocated memory is still 185.6 MB. Free memory was 162.9 MB in the beginning and 149.2 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 610088.86 ms. Allocated memory was 185.6 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 148.7 MB in the beginning and 6.0 GB in the end (delta: -5.9 GB). Peak memory consumption was 2.0 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (121965states) and FLOYD_HOARE automaton (currently 9 states, 9 states before enhancement),while ReachableStatesComputation was computing reachable states (122342 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 50 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 609983.0ms, OverallIterations: 111, TraceHistogramMax: 2, EmptinessCheckTime: 34002.9ms, AutomataDifference: 197625.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 58.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5622 SDtfs, 11596 SDslu, 19715 SDs, 0 SdLazy, 21203 SolverSat, 3539 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11322.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3514 GetRequests, 2188 SyntacticMatches, 217 SemanticMatches, 1109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3859 ImplicationChecksByTransitivity, 8454.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=181308occurred in iteration=69, InterpolantAutomatonStates: 1198, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 340202.3ms AutomataMinimizationTime, 110 MinimizatonAttempts, 1389032 StatesRemovedByMinimization, 110 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 320.2ms SsaConstructionTime, 1085.6ms SatisfiabilityAnalysisTime, 12161.5ms InterpolantComputationTime, 5262 NumberOfCodeBlocks, 5257 NumberOfCodeBlocksAsserted, 306 NumberOfCheckSat, 5048 ConstructedInterpolants, 0 QuantifiedInterpolants, 22667 SizeOfPredicates, 113 NumberOfNonLiveVariables, 7220 ConjunctsInSsa, 1020 ConjunctsInUnsatCore, 214 InterpolantComputations, 10 PerfectInterpolantSequences, 194/788 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