/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:26:52,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:26:52,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:26:53,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:26:53,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:26:53,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:26:53,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:26:53,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:26:53,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:26:53,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:26:53,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:26:53,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-11-06 22:26:53,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:26:53,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:26:53,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:26:53,061 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:26:53,100 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:26:53,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:26:53,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:26:53,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:26:53,102 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:26:53,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:26:53,103 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:26:53,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:26:53,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:26:53,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:26:53,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:26:53,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:26:53,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:26:53,105 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:26:53,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:26:53,105 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:26:53,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:26:53,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:26:53,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:26:53,106 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:26:53,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:26:53,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:26:53,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:26:53,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:26:53,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:26:53,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:26:53,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:26:53,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:26:53,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:26:53,109 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:26:53,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:26:53,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:26:53,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:26:53,506 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:26:53,507 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:26:53,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-11-06 22:26:53,593 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e189d9b89/2e23eadbfbd143068e4a4360d5ab1436/FLAG4715c7402 [2020-11-06 22:26:54,179 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:26:54,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_8.c [2020-11-06 22:26:54,188 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e189d9b89/2e23eadbfbd143068e4a4360d5ab1436/FLAG4715c7402 [2020-11-06 22:26:54,541 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e189d9b89/2e23eadbfbd143068e4a4360d5ab1436 [2020-11-06 22:26:54,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:26:54,554 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:26:54,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:26:54,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:26:54,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:26:54,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:54" (1/1) ... [2020-11-06 22:26:54,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f1f0c14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:54, skipping insertion in model container [2020-11-06 22:26:54,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:54" (1/1) ... [2020-11-06 22:26:54,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:26:54,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:26:54,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:26:54,817 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:26:54,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:26:54,861 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:26:54,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:54 WrapperNode [2020-11-06 22:26:54,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:26:54,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:26:54,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:26:54,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:26:54,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:54" (1/1) ... [2020-11-06 22:26:54,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:54" (1/1) ... [2020-11-06 22:26:54,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:54" (1/1) ... [2020-11-06 22:26:54,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:54" (1/1) ... [2020-11-06 22:26:54,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:54" (1/1) ... [2020-11-06 22:26:54,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:54" (1/1) ... [2020-11-06 22:26:54,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:54" (1/1) ... [2020-11-06 22:26:54,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:26:54,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:26:54,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:26:54,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:26:54,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:54" (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 [2020-11-06 22:26:54,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:26:54,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:26:54,983 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:26:54,983 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:26:54,983 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:26:54,983 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:26:54,984 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:26:54,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:26:54,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:26:54,984 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:26:54,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:26:54,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:26:54,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:26:54,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:26:54,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:26:54,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:26:55,559 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:26:55,561 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:26:55,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:55 BoogieIcfgContainer [2020-11-06 22:26:55,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:26:55,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:26:55,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:26:55,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:26:55,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:26:54" (1/3) ... [2020-11-06 22:26:55,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d3a1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:55, skipping insertion in model container [2020-11-06 22:26:55,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:54" (2/3) ... [2020-11-06 22:26:55,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d3a1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:55, skipping insertion in model container [2020-11-06 22:26:55,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:55" (3/3) ... [2020-11-06 22:26:55,573 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-11-06 22:26:55,590 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:26:55,594 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:26:55,608 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:26:55,654 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:26:55,654 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:26:55,654 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:26:55,654 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:26:55,654 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:26:55,655 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:26:55,655 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:26:55,655 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:26:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-11-06 22:26:55,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-06 22:26:55,688 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:55,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:26:55,689 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:55,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:55,699 INFO L82 PathProgramCache]: Analyzing trace with hash -2103640679, now seen corresponding path program 1 times [2020-11-06 22:26:55,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:55,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681851555] [2020-11-06 22:26:55,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:56,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:56,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681851555] [2020-11-06 22:26:56,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:56,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:56,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13152302] [2020-11-06 22:26:56,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:56,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:56,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:56,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:56,111 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 4 states. [2020-11-06 22:26:56,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:56,356 INFO L93 Difference]: Finished difference Result 80 states and 133 transitions. [2020-11-06 22:26:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:56,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-06 22:26:56,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:56,369 INFO L225 Difference]: With dead ends: 80 [2020-11-06 22:26:56,370 INFO L226 Difference]: Without dead ends: 61 [2020-11-06 22:26:56,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:56,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-06 22:26:56,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2020-11-06 22:26:56,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-06 22:26:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 75 transitions. [2020-11-06 22:26:56,420 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 75 transitions. Word has length 20 [2020-11-06 22:26:56,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:56,420 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 75 transitions. [2020-11-06 22:26:56,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:56,421 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 75 transitions. [2020-11-06 22:26:56,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-06 22:26:56,422 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:56,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:26:56,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:26:56,422 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:56,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:56,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1845475241, now seen corresponding path program 1 times [2020-11-06 22:26:56,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:56,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075751906] [2020-11-06 22:26:56,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:56,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:56,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:56,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075751906] [2020-11-06 22:26:56,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:56,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:56,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657065504] [2020-11-06 22:26:56,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:56,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:56,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:56,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:56,515 INFO L87 Difference]: Start difference. First operand 44 states and 75 transitions. Second operand 4 states. [2020-11-06 22:26:56,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:56,668 INFO L93 Difference]: Finished difference Result 99 states and 175 transitions. [2020-11-06 22:26:56,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:56,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-06 22:26:56,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:56,671 INFO L225 Difference]: With dead ends: 99 [2020-11-06 22:26:56,671 INFO L226 Difference]: Without dead ends: 61 [2020-11-06 22:26:56,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:56,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-06 22:26:56,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-11-06 22:26:56,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-06 22:26:56,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 103 transitions. [2020-11-06 22:26:56,685 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 103 transitions. Word has length 20 [2020-11-06 22:26:56,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:56,686 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 103 transitions. [2020-11-06 22:26:56,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:56,686 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 103 transitions. [2020-11-06 22:26:56,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:26:56,688 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:56,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:26:56,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:26:56,689 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:56,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:56,691 INFO L82 PathProgramCache]: Analyzing trace with hash -781723127, now seen corresponding path program 1 times [2020-11-06 22:26:56,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:56,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500118565] [2020-11-06 22:26:56,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:56,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:56,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500118565] [2020-11-06 22:26:56,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:56,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:56,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674792499] [2020-11-06 22:26:56,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:56,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:56,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:56,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:56,814 INFO L87 Difference]: Start difference. First operand 60 states and 103 transitions. Second operand 4 states. [2020-11-06 22:26:56,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:56,957 INFO L93 Difference]: Finished difference Result 92 states and 156 transitions. [2020-11-06 22:26:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:56,958 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-06 22:26:56,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:56,959 INFO L225 Difference]: With dead ends: 92 [2020-11-06 22:26:56,959 INFO L226 Difference]: Without dead ends: 64 [2020-11-06 22:26:56,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:56,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-06 22:26:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-11-06 22:26:56,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-06 22:26:56,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 105 transitions. [2020-11-06 22:26:56,970 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 105 transitions. Word has length 21 [2020-11-06 22:26:56,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:56,971 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 105 transitions. [2020-11-06 22:26:56,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:56,971 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 105 transitions. [2020-11-06 22:26:56,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:26:56,972 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:56,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:26:56,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:26:56,972 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:56,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:56,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1368529141, now seen corresponding path program 1 times [2020-11-06 22:26:56,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:56,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673744253] [2020-11-06 22:26:56,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:57,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:57,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673744253] [2020-11-06 22:26:57,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:57,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:57,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142131708] [2020-11-06 22:26:57,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:57,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:57,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:57,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:57,038 INFO L87 Difference]: Start difference. First operand 63 states and 105 transitions. Second operand 4 states. [2020-11-06 22:26:57,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:57,172 INFO L93 Difference]: Finished difference Result 167 states and 290 transitions. [2020-11-06 22:26:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:57,173 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-06 22:26:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:57,174 INFO L225 Difference]: With dead ends: 167 [2020-11-06 22:26:57,175 INFO L226 Difference]: Without dead ends: 113 [2020-11-06 22:26:57,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:57,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-06 22:26:57,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-11-06 22:26:57,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-06 22:26:57,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 190 transitions. [2020-11-06 22:26:57,189 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 190 transitions. Word has length 21 [2020-11-06 22:26:57,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:57,189 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 190 transitions. [2020-11-06 22:26:57,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:57,189 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 190 transitions. [2020-11-06 22:26:57,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:26:57,191 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:57,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:26:57,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 22:26:57,191 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:57,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:57,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1626694579, now seen corresponding path program 1 times [2020-11-06 22:26:57,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:57,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015605558] [2020-11-06 22:26:57,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:57,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:57,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015605558] [2020-11-06 22:26:57,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:57,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:57,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105300911] [2020-11-06 22:26:57,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:57,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:57,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:57,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:57,257 INFO L87 Difference]: Start difference. First operand 112 states and 190 transitions. Second operand 4 states. [2020-11-06 22:26:57,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:57,400 INFO L93 Difference]: Finished difference Result 144 states and 245 transitions. [2020-11-06 22:26:57,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:57,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-06 22:26:57,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:57,402 INFO L225 Difference]: With dead ends: 144 [2020-11-06 22:26:57,402 INFO L226 Difference]: Without dead ends: 141 [2020-11-06 22:26:57,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:57,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-11-06 22:26:57,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 112. [2020-11-06 22:26:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-06 22:26:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 188 transitions. [2020-11-06 22:26:57,415 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 188 transitions. Word has length 21 [2020-11-06 22:26:57,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:57,416 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 188 transitions. [2020-11-06 22:26:57,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:57,416 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 188 transitions. [2020-11-06 22:26:57,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:26:57,417 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:57,417 INFO L422 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] [2020-11-06 22:26:57,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 22:26:57,418 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:57,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:57,418 INFO L82 PathProgramCache]: Analyzing trace with hash 531908642, now seen corresponding path program 1 times [2020-11-06 22:26:57,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:57,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029877457] [2020-11-06 22:26:57,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:57,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:57,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029877457] [2020-11-06 22:26:57,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:57,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:57,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58967452] [2020-11-06 22:26:57,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:57,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:57,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:57,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:57,498 INFO L87 Difference]: Start difference. First operand 112 states and 188 transitions. Second operand 4 states. [2020-11-06 22:26:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:57,646 INFO L93 Difference]: Finished difference Result 204 states and 349 transitions. [2020-11-06 22:26:57,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:57,646 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-06 22:26:57,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:57,648 INFO L225 Difference]: With dead ends: 204 [2020-11-06 22:26:57,648 INFO L226 Difference]: Without dead ends: 201 [2020-11-06 22:26:57,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:57,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-11-06 22:26:57,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 152. [2020-11-06 22:26:57,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-06 22:26:57,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 254 transitions. [2020-11-06 22:26:57,661 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 254 transitions. Word has length 22 [2020-11-06 22:26:57,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:57,661 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 254 transitions. [2020-11-06 22:26:57,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:57,662 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 254 transitions. [2020-11-06 22:26:57,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:26:57,663 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:57,663 INFO L422 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] [2020-11-06 22:26:57,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 22:26:57,664 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:57,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:57,664 INFO L82 PathProgramCache]: Analyzing trace with hash 790074080, now seen corresponding path program 1 times [2020-11-06 22:26:57,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:57,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170059737] [2020-11-06 22:26:57,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:57,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:57,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170059737] [2020-11-06 22:26:57,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:57,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:57,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967759291] [2020-11-06 22:26:57,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:57,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:57,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:57,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:57,725 INFO L87 Difference]: Start difference. First operand 152 states and 254 transitions. Second operand 4 states. [2020-11-06 22:26:57,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:57,849 INFO L93 Difference]: Finished difference Result 352 states and 597 transitions. [2020-11-06 22:26:57,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:57,849 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-06 22:26:57,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:57,851 INFO L225 Difference]: With dead ends: 352 [2020-11-06 22:26:57,851 INFO L226 Difference]: Without dead ends: 209 [2020-11-06 22:26:57,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:57,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-11-06 22:26:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2020-11-06 22:26:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-11-06 22:26:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 344 transitions. [2020-11-06 22:26:57,866 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 344 transitions. Word has length 22 [2020-11-06 22:26:57,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:57,866 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 344 transitions. [2020-11-06 22:26:57,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:57,866 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 344 transitions. [2020-11-06 22:26:57,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:26:57,871 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:57,871 INFO L422 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] [2020-11-06 22:26:57,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 22:26:57,871 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:57,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:57,872 INFO L82 PathProgramCache]: Analyzing trace with hash -684051658, now seen corresponding path program 1 times [2020-11-06 22:26:57,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:57,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734714670] [2020-11-06 22:26:57,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:57,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:57,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734714670] [2020-11-06 22:26:57,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:57,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:57,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091346573] [2020-11-06 22:26:57,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:57,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:57,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:57,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:57,960 INFO L87 Difference]: Start difference. First operand 208 states and 344 transitions. Second operand 4 states. [2020-11-06 22:26:58,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:58,099 INFO L93 Difference]: Finished difference Result 314 states and 519 transitions. [2020-11-06 22:26:58,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:58,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-06 22:26:58,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:58,101 INFO L225 Difference]: With dead ends: 314 [2020-11-06 22:26:58,101 INFO L226 Difference]: Without dead ends: 215 [2020-11-06 22:26:58,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:58,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-11-06 22:26:58,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2020-11-06 22:26:58,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-11-06 22:26:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 348 transitions. [2020-11-06 22:26:58,134 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 348 transitions. Word has length 23 [2020-11-06 22:26:58,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:58,134 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 348 transitions. [2020-11-06 22:26:58,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 348 transitions. [2020-11-06 22:26:58,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:26:58,137 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:58,137 INFO L422 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] [2020-11-06 22:26:58,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 22:26:58,137 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:58,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:58,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1270857672, now seen corresponding path program 1 times [2020-11-06 22:26:58,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:58,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164685926] [2020-11-06 22:26:58,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:58,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:58,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164685926] [2020-11-06 22:26:58,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:58,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:58,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089949170] [2020-11-06 22:26:58,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:58,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:58,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:58,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:58,239 INFO L87 Difference]: Start difference. First operand 214 states and 348 transitions. Second operand 4 states. [2020-11-06 22:26:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:58,399 INFO L93 Difference]: Finished difference Result 382 states and 631 transitions. [2020-11-06 22:26:58,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:58,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-06 22:26:58,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:58,403 INFO L225 Difference]: With dead ends: 382 [2020-11-06 22:26:58,403 INFO L226 Difference]: Without dead ends: 379 [2020-11-06 22:26:58,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:58,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-11-06 22:26:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 298. [2020-11-06 22:26:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-11-06 22:26:58,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 476 transitions. [2020-11-06 22:26:58,417 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 476 transitions. Word has length 23 [2020-11-06 22:26:58,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:58,418 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 476 transitions. [2020-11-06 22:26:58,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:58,418 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 476 transitions. [2020-11-06 22:26:58,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:26:58,419 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:58,419 INFO L422 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] [2020-11-06 22:26:58,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 22:26:58,420 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:58,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:58,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1012692234, now seen corresponding path program 1 times [2020-11-06 22:26:58,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:58,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291030669] [2020-11-06 22:26:58,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:58,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:58,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291030669] [2020-11-06 22:26:58,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:58,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:58,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351896420] [2020-11-06 22:26:58,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:58,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:58,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:58,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:58,484 INFO L87 Difference]: Start difference. First operand 298 states and 476 transitions. Second operand 4 states. [2020-11-06 22:26:58,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:58,691 INFO L93 Difference]: Finished difference Result 686 states and 1103 transitions. [2020-11-06 22:26:58,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:58,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-06 22:26:58,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:58,694 INFO L225 Difference]: With dead ends: 686 [2020-11-06 22:26:58,694 INFO L226 Difference]: Without dead ends: 403 [2020-11-06 22:26:58,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:58,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-11-06 22:26:58,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 402. [2020-11-06 22:26:58,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-11-06 22:26:58,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 632 transitions. [2020-11-06 22:26:58,716 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 632 transitions. Word has length 23 [2020-11-06 22:26:58,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:58,716 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 632 transitions. [2020-11-06 22:26:58,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:58,716 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 632 transitions. [2020-11-06 22:26:58,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-06 22:26:58,718 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:58,718 INFO L422 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] [2020-11-06 22:26:58,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 22:26:58,718 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:58,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:58,719 INFO L82 PathProgramCache]: Analyzing trace with hash -735221973, now seen corresponding path program 1 times [2020-11-06 22:26:58,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:58,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824315611] [2020-11-06 22:26:58,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:58,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:58,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824315611] [2020-11-06 22:26:58,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:58,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:58,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976551602] [2020-11-06 22:26:58,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:58,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:58,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:58,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:58,777 INFO L87 Difference]: Start difference. First operand 402 states and 632 transitions. Second operand 4 states. [2020-11-06 22:26:58,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:58,964 INFO L93 Difference]: Finished difference Result 602 states and 943 transitions. [2020-11-06 22:26:58,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:58,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-06 22:26:58,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:58,967 INFO L225 Difference]: With dead ends: 602 [2020-11-06 22:26:58,967 INFO L226 Difference]: Without dead ends: 411 [2020-11-06 22:26:58,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:58,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-11-06 22:26:58,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 410. [2020-11-06 22:26:58,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-11-06 22:26:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 632 transitions. [2020-11-06 22:26:58,997 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 632 transitions. Word has length 24 [2020-11-06 22:26:58,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:58,997 INFO L481 AbstractCegarLoop]: Abstraction has 410 states and 632 transitions. [2020-11-06 22:26:58,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:58,997 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 632 transitions. [2020-11-06 22:26:59,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-06 22:26:59,002 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:59,002 INFO L422 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] [2020-11-06 22:26:59,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 22:26:59,002 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:59,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:59,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1322027987, now seen corresponding path program 1 times [2020-11-06 22:26:59,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:59,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717358209] [2020-11-06 22:26:59,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:59,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:59,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717358209] [2020-11-06 22:26:59,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:59,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:59,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148600151] [2020-11-06 22:26:59,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:59,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:59,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:59,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:59,118 INFO L87 Difference]: Start difference. First operand 410 states and 632 transitions. Second operand 4 states. [2020-11-06 22:26:59,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:59,304 INFO L93 Difference]: Finished difference Result 718 states and 1123 transitions. [2020-11-06 22:26:59,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:59,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-06 22:26:59,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:59,311 INFO L225 Difference]: With dead ends: 718 [2020-11-06 22:26:59,311 INFO L226 Difference]: Without dead ends: 715 [2020-11-06 22:26:59,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:59,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2020-11-06 22:26:59,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 586. [2020-11-06 22:26:59,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-11-06 22:26:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 880 transitions. [2020-11-06 22:26:59,341 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 880 transitions. Word has length 24 [2020-11-06 22:26:59,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:59,343 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 880 transitions. [2020-11-06 22:26:59,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:59,343 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 880 transitions. [2020-11-06 22:26:59,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-06 22:26:59,345 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:59,345 INFO L422 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] [2020-11-06 22:26:59,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 22:26:59,346 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:59,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:59,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1063862549, now seen corresponding path program 1 times [2020-11-06 22:26:59,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:59,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569554558] [2020-11-06 22:26:59,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:59,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:59,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569554558] [2020-11-06 22:26:59,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:59,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:59,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870967254] [2020-11-06 22:26:59,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:59,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:59,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:59,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:59,427 INFO L87 Difference]: Start difference. First operand 586 states and 880 transitions. Second operand 4 states. [2020-11-06 22:26:59,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:59,605 INFO L93 Difference]: Finished difference Result 1342 states and 2019 transitions. [2020-11-06 22:26:59,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:59,605 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-06 22:26:59,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:59,610 INFO L225 Difference]: With dead ends: 1342 [2020-11-06 22:26:59,610 INFO L226 Difference]: Without dead ends: 779 [2020-11-06 22:26:59,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:59,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-11-06 22:26:59,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 778. [2020-11-06 22:26:59,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2020-11-06 22:26:59,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1144 transitions. [2020-11-06 22:26:59,648 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1144 transitions. Word has length 24 [2020-11-06 22:26:59,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:59,648 INFO L481 AbstractCegarLoop]: Abstraction has 778 states and 1144 transitions. [2020-11-06 22:26:59,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:59,648 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1144 transitions. [2020-11-06 22:26:59,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-06 22:26:59,650 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:59,650 INFO L422 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] [2020-11-06 22:26:59,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-06 22:26:59,650 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:59,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:59,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1973476129, now seen corresponding path program 1 times [2020-11-06 22:26:59,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:59,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623819939] [2020-11-06 22:26:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:59,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:59,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623819939] [2020-11-06 22:26:59,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:59,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:59,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469798991] [2020-11-06 22:26:59,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:59,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:59,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:59,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:59,709 INFO L87 Difference]: Start difference. First operand 778 states and 1144 transitions. Second operand 4 states. [2020-11-06 22:26:59,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:59,864 INFO L93 Difference]: Finished difference Result 1166 states and 1707 transitions. [2020-11-06 22:26:59,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:59,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-06 22:26:59,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:59,868 INFO L225 Difference]: With dead ends: 1166 [2020-11-06 22:26:59,868 INFO L226 Difference]: Without dead ends: 795 [2020-11-06 22:26:59,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:59,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2020-11-06 22:26:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 794. [2020-11-06 22:26:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-11-06 22:26:59,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1144 transitions. [2020-11-06 22:26:59,919 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1144 transitions. Word has length 25 [2020-11-06 22:26:59,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:59,920 INFO L481 AbstractCegarLoop]: Abstraction has 794 states and 1144 transitions. [2020-11-06 22:26:59,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:59,920 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1144 transitions. [2020-11-06 22:26:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-06 22:26:59,921 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:59,921 INFO L422 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] [2020-11-06 22:26:59,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-06 22:26:59,922 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:59,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:59,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1386670115, now seen corresponding path program 1 times [2020-11-06 22:26:59,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:59,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797115846] [2020-11-06 22:26:59,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:59,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:59,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797115846] [2020-11-06 22:26:59,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:59,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:59,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707977291] [2020-11-06 22:26:59,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:59,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:59,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:59,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:59,975 INFO L87 Difference]: Start difference. First operand 794 states and 1144 transitions. Second operand 4 states. [2020-11-06 22:27:00,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:00,133 INFO L93 Difference]: Finished difference Result 1358 states and 1979 transitions. [2020-11-06 22:27:00,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:27:00,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-06 22:27:00,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:00,140 INFO L225 Difference]: With dead ends: 1358 [2020-11-06 22:27:00,140 INFO L226 Difference]: Without dead ends: 1355 [2020-11-06 22:27:00,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:27:00,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2020-11-06 22:27:00,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1162. [2020-11-06 22:27:00,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2020-11-06 22:27:00,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1624 transitions. [2020-11-06 22:27:00,185 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1624 transitions. Word has length 25 [2020-11-06 22:27:00,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:00,185 INFO L481 AbstractCegarLoop]: Abstraction has 1162 states and 1624 transitions. [2020-11-06 22:27:00,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:27:00,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1624 transitions. [2020-11-06 22:27:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-06 22:27:00,187 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:00,187 INFO L422 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] [2020-11-06 22:27:00,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-06 22:27:00,188 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:00,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:00,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1644835553, now seen corresponding path program 1 times [2020-11-06 22:27:00,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:00,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536239742] [2020-11-06 22:27:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:00,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:00,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536239742] [2020-11-06 22:27:00,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:00,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:27:00,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966414042] [2020-11-06 22:27:00,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:27:00,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:00,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:27:00,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:27:00,244 INFO L87 Difference]: Start difference. First operand 1162 states and 1624 transitions. Second operand 4 states. [2020-11-06 22:27:00,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:00,414 INFO L93 Difference]: Finished difference Result 2638 states and 3675 transitions. [2020-11-06 22:27:00,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:27:00,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-06 22:27:00,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:00,422 INFO L225 Difference]: With dead ends: 2638 [2020-11-06 22:27:00,422 INFO L226 Difference]: Without dead ends: 1515 [2020-11-06 22:27:00,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:27:00,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2020-11-06 22:27:00,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1514. [2020-11-06 22:27:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2020-11-06 22:27:00,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 2056 transitions. [2020-11-06 22:27:00,507 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 2056 transitions. Word has length 25 [2020-11-06 22:27:00,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:00,508 INFO L481 AbstractCegarLoop]: Abstraction has 1514 states and 2056 transitions. [2020-11-06 22:27:00,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:27:00,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 2056 transitions. [2020-11-06 22:27:00,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-06 22:27:00,511 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:00,511 INFO L422 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, 1] [2020-11-06 22:27:00,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-06 22:27:00,511 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:00,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:00,512 INFO L82 PathProgramCache]: Analyzing trace with hash 43781942, now seen corresponding path program 1 times [2020-11-06 22:27:00,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:00,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555687076] [2020-11-06 22:27:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:00,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:00,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555687076] [2020-11-06 22:27:00,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:00,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:27:00,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765930487] [2020-11-06 22:27:00,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:27:00,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:00,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:27:00,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:27:00,569 INFO L87 Difference]: Start difference. First operand 1514 states and 2056 transitions. Second operand 4 states. [2020-11-06 22:27:00,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:00,741 INFO L93 Difference]: Finished difference Result 2270 states and 3067 transitions. [2020-11-06 22:27:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:27:00,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-06 22:27:00,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:00,749 INFO L225 Difference]: With dead ends: 2270 [2020-11-06 22:27:00,749 INFO L226 Difference]: Without dead ends: 1547 [2020-11-06 22:27:00,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:27:00,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2020-11-06 22:27:00,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1546. [2020-11-06 22:27:00,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2020-11-06 22:27:00,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2056 transitions. [2020-11-06 22:27:00,814 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2056 transitions. Word has length 26 [2020-11-06 22:27:00,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:00,814 INFO L481 AbstractCegarLoop]: Abstraction has 1546 states and 2056 transitions. [2020-11-06 22:27:00,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:27:00,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2056 transitions. [2020-11-06 22:27:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-06 22:27:00,817 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:00,817 INFO L422 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, 1] [2020-11-06 22:27:00,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-06 22:27:00,817 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:00,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:00,818 INFO L82 PathProgramCache]: Analyzing trace with hash -543024072, now seen corresponding path program 1 times [2020-11-06 22:27:00,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:00,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641982488] [2020-11-06 22:27:00,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:00,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:00,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641982488] [2020-11-06 22:27:00,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:00,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:27:00,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923462698] [2020-11-06 22:27:00,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:27:00,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:00,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:27:00,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:27:00,868 INFO L87 Difference]: Start difference. First operand 1546 states and 2056 transitions. Second operand 4 states. [2020-11-06 22:27:01,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:01,053 INFO L93 Difference]: Finished difference Result 2574 states and 3435 transitions. [2020-11-06 22:27:01,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:27:01,053 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-06 22:27:01,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:01,065 INFO L225 Difference]: With dead ends: 2574 [2020-11-06 22:27:01,065 INFO L226 Difference]: Without dead ends: 2571 [2020-11-06 22:27:01,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:27:01,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2020-11-06 22:27:01,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2314. [2020-11-06 22:27:01,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2314 states. [2020-11-06 22:27:01,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 2984 transitions. [2020-11-06 22:27:01,166 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 2984 transitions. Word has length 26 [2020-11-06 22:27:01,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:01,166 INFO L481 AbstractCegarLoop]: Abstraction has 2314 states and 2984 transitions. [2020-11-06 22:27:01,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:27:01,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 2984 transitions. [2020-11-06 22:27:01,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-06 22:27:01,170 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:01,171 INFO L422 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, 1] [2020-11-06 22:27:01,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-06 22:27:01,171 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:01,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:01,171 INFO L82 PathProgramCache]: Analyzing trace with hash -284858634, now seen corresponding path program 1 times [2020-11-06 22:27:01,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:01,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832043015] [2020-11-06 22:27:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:01,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:01,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832043015] [2020-11-06 22:27:01,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:01,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:27:01,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432658874] [2020-11-06 22:27:01,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:27:01,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:01,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:27:01,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:27:01,226 INFO L87 Difference]: Start difference. First operand 2314 states and 2984 transitions. Second operand 4 states. [2020-11-06 22:27:01,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:01,429 INFO L93 Difference]: Finished difference Result 5198 states and 6635 transitions. [2020-11-06 22:27:01,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:27:01,430 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-06 22:27:01,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:01,443 INFO L225 Difference]: With dead ends: 5198 [2020-11-06 22:27:01,444 INFO L226 Difference]: Without dead ends: 2955 [2020-11-06 22:27:01,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:27:01,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2020-11-06 22:27:01,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2954. [2020-11-06 22:27:01,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2954 states. [2020-11-06 22:27:01,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 3656 transitions. [2020-11-06 22:27:01,570 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 3656 transitions. Word has length 26 [2020-11-06 22:27:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:01,570 INFO L481 AbstractCegarLoop]: Abstraction has 2954 states and 3656 transitions. [2020-11-06 22:27:01,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:27:01,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 3656 transitions. [2020-11-06 22:27:01,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:27:01,575 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:01,575 INFO L422 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, 1, 1] [2020-11-06 22:27:01,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-06 22:27:01,576 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:01,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:01,576 INFO L82 PathProgramCache]: Analyzing trace with hash 352814860, now seen corresponding path program 1 times [2020-11-06 22:27:01,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:01,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195999472] [2020-11-06 22:27:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:01,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:01,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195999472] [2020-11-06 22:27:01,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:01,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:27:01,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018179335] [2020-11-06 22:27:01,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:27:01,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:01,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:27:01,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:27:01,654 INFO L87 Difference]: Start difference. First operand 2954 states and 3656 transitions. Second operand 4 states. [2020-11-06 22:27:01,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:01,856 INFO L93 Difference]: Finished difference Result 4430 states and 5451 transitions. [2020-11-06 22:27:01,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:27:01,856 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-06 22:27:01,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:01,870 INFO L225 Difference]: With dead ends: 4430 [2020-11-06 22:27:01,870 INFO L226 Difference]: Without dead ends: 3019 [2020-11-06 22:27:01,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:27:01,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2020-11-06 22:27:01,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3018. [2020-11-06 22:27:01,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3018 states. [2020-11-06 22:27:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3018 states to 3018 states and 3656 transitions. [2020-11-06 22:27:01,994 INFO L78 Accepts]: Start accepts. Automaton has 3018 states and 3656 transitions. Word has length 27 [2020-11-06 22:27:01,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:01,994 INFO L481 AbstractCegarLoop]: Abstraction has 3018 states and 3656 transitions. [2020-11-06 22:27:01,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:27:01,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3018 states and 3656 transitions. [2020-11-06 22:27:01,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:27:01,998 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:01,998 INFO L422 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, 1, 1] [2020-11-06 22:27:01,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-06 22:27:01,999 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:01,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:01,999 INFO L82 PathProgramCache]: Analyzing trace with hash -233991154, now seen corresponding path program 1 times [2020-11-06 22:27:01,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:02,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161070194] [2020-11-06 22:27:02,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:02,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:02,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161070194] [2020-11-06 22:27:02,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:02,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:27:02,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836334422] [2020-11-06 22:27:02,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:27:02,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:02,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:27:02,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:27:02,056 INFO L87 Difference]: Start difference. First operand 3018 states and 3656 transitions. Second operand 4 states. [2020-11-06 22:27:02,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:02,318 INFO L93 Difference]: Finished difference Result 4877 states and 5834 transitions. [2020-11-06 22:27:02,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:27:02,319 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-06 22:27:02,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:02,338 INFO L225 Difference]: With dead ends: 4877 [2020-11-06 22:27:02,339 INFO L226 Difference]: Without dead ends: 4874 [2020-11-06 22:27:02,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:27:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4874 states. [2020-11-06 22:27:02,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4874 to 4618. [2020-11-06 22:27:02,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4618 states. [2020-11-06 22:27:02,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4618 states to 4618 states and 5448 transitions. [2020-11-06 22:27:02,502 INFO L78 Accepts]: Start accepts. Automaton has 4618 states and 5448 transitions. Word has length 27 [2020-11-06 22:27:02,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:02,503 INFO L481 AbstractCegarLoop]: Abstraction has 4618 states and 5448 transitions. [2020-11-06 22:27:02,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:27:02,503 INFO L276 IsEmpty]: Start isEmpty. Operand 4618 states and 5448 transitions. [2020-11-06 22:27:02,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:27:02,511 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:02,511 INFO L422 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, 1, 1] [2020-11-06 22:27:02,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-06 22:27:02,511 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:02,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:02,512 INFO L82 PathProgramCache]: Analyzing trace with hash 24174284, now seen corresponding path program 1 times [2020-11-06 22:27:02,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:02,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195172123] [2020-11-06 22:27:02,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:02,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:02,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:02,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195172123] [2020-11-06 22:27:02,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:02,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:27:02,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195779154] [2020-11-06 22:27:02,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:27:02,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:02,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:27:02,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:27:02,575 INFO L87 Difference]: Start difference. First operand 4618 states and 5448 transitions. Second operand 4 states. [2020-11-06 22:27:02,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:02,875 INFO L93 Difference]: Finished difference Result 10250 states and 11848 transitions. [2020-11-06 22:27:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:27:02,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-06 22:27:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:02,876 INFO L225 Difference]: With dead ends: 10250 [2020-11-06 22:27:02,876 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:27:02,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:27:02,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:27:02,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:27:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:27:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:27:02,895 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-11-06 22:27:02,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:02,895 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:27:02,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:27:02,895 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:27:02,896 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:27:02,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-06 22:27:02,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:27:08,631 WARN L194 SmtUtils]: Spent 5.70 s on a formula simplification. DAG size of input: 1093 DAG size of output: 32 [2020-11-06 22:27:08,692 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-11-06 22:27:08,692 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-06 22:27:08,692 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-11-06 22:27:08,693 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-06 22:27:08,693 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:27:08,693 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-06 22:27:08,693 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:27:08,693 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:27:08,693 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:27:08,693 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:27:08,693 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:27:08,694 INFO L266 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-11-06 22:27:08,694 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 6 137) no Hoare annotation was computed. [2020-11-06 22:27:08,694 INFO L266 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-11-06 22:27:08,694 INFO L266 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-11-06 22:27:08,694 INFO L266 CegarLoopResult]: For program point L102-1(lines 35 132) no Hoare annotation was computed. [2020-11-06 22:27:08,694 INFO L269 CegarLoopResult]: At program point L127-1(lines 35 132) the Hoare annotation is: true [2020-11-06 22:27:08,694 INFO L266 CegarLoopResult]: For program point L86-1(lines 35 132) no Hoare annotation was computed. [2020-11-06 22:27:08,696 INFO L266 CegarLoopResult]: For program point L78-1(lines 35 132) no Hoare annotation was computed. [2020-11-06 22:27:08,696 INFO L266 CegarLoopResult]: For program point L103(line 103) no Hoare annotation was computed. [2020-11-06 22:27:08,696 INFO L266 CegarLoopResult]: For program point L37(lines 37 39) no Hoare annotation was computed. [2020-11-06 22:27:08,696 INFO L266 CegarLoopResult]: For program point L70-1(lines 35 132) no Hoare annotation was computed. [2020-11-06 22:27:08,696 INFO L266 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-11-06 22:27:08,697 INFO L262 CegarLoopResult]: At program point L128-1(lines 7 137) the Hoare annotation is: false [2020-11-06 22:27:08,697 INFO L266 CegarLoopResult]: For program point L62-1(lines 35 132) no Hoare annotation was computed. [2020-11-06 22:27:08,697 INFO L266 CegarLoopResult]: For program point L112-1(lines 35 132) no Hoare annotation was computed. [2020-11-06 22:27:08,697 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 6 137) no Hoare annotation was computed. [2020-11-06 22:27:08,697 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 6 137) the Hoare annotation is: true [2020-11-06 22:27:08,697 INFO L266 CegarLoopResult]: For program point L113(line 113) no Hoare annotation was computed. [2020-11-06 22:27:08,697 INFO L266 CegarLoopResult]: For program point L97-1(lines 35 132) no Hoare annotation was computed. [2020-11-06 22:27:08,697 INFO L266 CegarLoopResult]: For program point L122-1(lines 35 132) no Hoare annotation was computed. [2020-11-06 22:27:08,698 INFO L266 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-11-06 22:27:08,698 INFO L266 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-11-06 22:27:08,698 INFO L266 CegarLoopResult]: For program point L82-1(lines 35 132) no Hoare annotation was computed. [2020-11-06 22:27:08,698 INFO L266 CegarLoopResult]: For program point L107-1(lines 35 132) no Hoare annotation was computed. [2020-11-06 22:27:08,698 INFO L266 CegarLoopResult]: For program point L74-1(lines 35 132) no Hoare annotation was computed. [2020-11-06 22:27:08,698 INFO L266 CegarLoopResult]: For program point L66-1(lines 35 132) no Hoare annotation was computed. [2020-11-06 22:27:08,698 INFO L266 CegarLoopResult]: For program point L58(lines 58 60) no Hoare annotation was computed. [2020-11-06 22:27:08,698 INFO L266 CegarLoopResult]: For program point L58-2(lines 35 132) no Hoare annotation was computed. [2020-11-06 22:27:08,698 INFO L266 CegarLoopResult]: For program point L108(line 108) no Hoare annotation was computed. [2020-11-06 22:27:08,699 INFO L269 CegarLoopResult]: At program point L133(lines 7 137) the Hoare annotation is: true [2020-11-06 22:27:08,699 INFO L266 CegarLoopResult]: For program point L92-1(lines 35 132) no Hoare annotation was computed. [2020-11-06 22:27:08,699 INFO L266 CegarLoopResult]: For program point L117-1(lines 35 132) no Hoare annotation was computed. [2020-11-06 22:27:08,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:27:08 BoogieIcfgContainer [2020-11-06 22:27:08,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:27:08,724 INFO L168 Benchmark]: Toolchain (without parser) took 14168.90 ms. Allocated memory was 169.9 MB in the beginning and 509.6 MB in the end (delta: 339.7 MB). Free memory was 146.6 MB in the beginning and 328.6 MB in the end (delta: -182.0 MB). Peak memory consumption was 300.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:08,724 INFO L168 Benchmark]: CDTParser took 1.34 ms. Allocated memory is still 125.8 MB. Free memory was 102.0 MB in the beginning and 101.9 MB in the end (delta: 63.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:27:08,725 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.20 ms. Allocated memory is still 169.9 MB. Free memory was 145.8 MB in the beginning and 135.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:08,725 INFO L168 Benchmark]: Boogie Preprocessor took 40.14 ms. Allocated memory is still 169.9 MB. Free memory was 135.9 MB in the beginning and 134.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:08,726 INFO L168 Benchmark]: RCFGBuilder took 659.65 ms. Allocated memory is still 169.9 MB. Free memory was 134.2 MB in the beginning and 146.4 MB in the end (delta: -12.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:08,728 INFO L168 Benchmark]: TraceAbstraction took 13148.19 ms. Allocated memory was 169.9 MB in the beginning and 509.6 MB in the end (delta: 339.7 MB). Free memory was 146.0 MB in the beginning and 328.6 MB in the end (delta: -182.5 MB). Peak memory consumption was 300.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:08,734 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.34 ms. Allocated memory is still 125.8 MB. Free memory was 102.0 MB in the beginning and 101.9 MB in the end (delta: 63.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 306.20 ms. Allocated memory is still 169.9 MB. Free memory was 145.8 MB in the beginning and 135.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.14 ms. Allocated memory is still 169.9 MB. Free memory was 135.9 MB in the beginning and 134.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 659.65 ms. Allocated memory is still 169.9 MB. Free memory was 134.2 MB in the beginning and 146.4 MB in the end (delta: -12.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13148.19 ms. Allocated memory was 169.9 MB in the beginning and 509.6 MB in the end (delta: 339.7 MB). Free memory was 146.0 MB in the beginning and 328.6 MB in the end (delta: -182.5 MB). Peak memory consumption was 300.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.2s, OverallIterations: 22, TraceHistogramMax: 1, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1563 SDtfs, 2212 SDslu, 171 SDs, 0 SdLazy, 1125 SolverSat, 79 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4618occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 22 MinimizatonAttempts, 1024 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 29 PreInvPairs, 288 NumberOfFragments, 38 HoareAnnotationTreeSize, 29 FomulaSimplifications, 3426278 FormulaSimplificationTreeSizeReduction, 5.7s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 522 NumberOfCodeBlocks, 522 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 500 ConstructedInterpolants, 0 QuantifiedInterpolants, 35954 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 22 InterpolantComputations, 22 PerfectInterpolantSequences, 0/0 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 proved your program to be correct! Received shutdown request...