/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_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:23:42,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:23:42,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:23:42,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 18:23:42,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:23:42,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:23:42,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:23:42,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:23:42,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:23:42,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:23:42,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:23:42,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:23:42,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:23:42,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:23:42,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:23:42,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:23:42,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:23:42,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:23:42,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:23:42,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:23:42,966 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 [2020-10-23 18:23:43,026 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:23:43,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:23:43,031 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:23:43,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:23:43,032 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:23:43,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:23:43,033 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:23:43,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:23:43,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:23:43,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:23:43,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:23:43,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:23:43,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:23:43,036 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:23:43,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:23:43,037 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:23:43,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:23:43,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:23:43,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:23:43,038 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:23:43,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:23:43,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:23:43,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:23:43,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:23:43,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:23:43,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:23:43,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:23:43,041 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:23:43,041 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:23:43,041 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:23:43,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:23:43,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:23:43,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:23:43,523 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:23:43,524 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:23:43,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-10-23 18:23:43,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4556e2d2/99556542bb8146b1afd2283c62af2b79/FLAGe3a35f0ba [2020-10-23 18:23:44,149 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:23:44,150 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_5.c [2020-10-23 18:23:44,160 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4556e2d2/99556542bb8146b1afd2283c62af2b79/FLAGe3a35f0ba [2020-10-23 18:23:44,517 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4556e2d2/99556542bb8146b1afd2283c62af2b79 [2020-10-23 18:23:44,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:23:44,527 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:23:44,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:23:44,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:23:44,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:23:44,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:23:44" (1/1) ... [2020-10-23 18:23:44,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e3daac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:44, skipping insertion in model container [2020-10-23 18:23:44,542 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:23:44" (1/1) ... [2020-10-23 18:23:44,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:23:44,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:23:44,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:23:44,754 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:23:44,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:23:44,799 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:23:44,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:44 WrapperNode [2020-10-23 18:23:44,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:23:44,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:23:44,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:23:44,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:23:44,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:44" (1/1) ... [2020-10-23 18:23:44,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:44" (1/1) ... [2020-10-23 18:23:44,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:44" (1/1) ... [2020-10-23 18:23:44,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:44" (1/1) ... [2020-10-23 18:23:44,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:44" (1/1) ... [2020-10-23 18:23:44,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:44" (1/1) ... [2020-10-23 18:23:44,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:44" (1/1) ... [2020-10-23 18:23:44,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:23:44,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:23:44,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:23:44,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:23:44,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:44" (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 [2020-10-23 18:23:44,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:23:44,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:23:44,920 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:23:44,920 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:23:44,921 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:23:44,921 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:23:44,921 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:23:44,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:23:44,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:23:44,921 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:23:44,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:23:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:23:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:23:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:23:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:23:44,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:23:45,472 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:23:45,472 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:23:45,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:23:45 BoogieIcfgContainer [2020-10-23 18:23:45,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:23:45,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:23:45,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:23:45,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:23:45,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:23:44" (1/3) ... [2020-10-23 18:23:45,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e29316d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:23:45, skipping insertion in model container [2020-10-23 18:23:45,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:44" (2/3) ... [2020-10-23 18:23:45,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e29316d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:23:45, skipping insertion in model container [2020-10-23 18:23:45,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:23:45" (3/3) ... [2020-10-23 18:23:45,499 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-10-23 18:23:45,512 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:23:45,518 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:23:45,532 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:23:45,578 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:23:45,578 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:23:45,579 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:23:45,579 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:23:45,579 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:23:45,579 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:23:45,579 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:23:45,580 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:23:45,605 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-23 18:23:45,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-23 18:23:45,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:45,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:45,616 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:45,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:45,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1452995030, now seen corresponding path program 1 times [2020-10-23 18:23:45,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:45,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761459437] [2020-10-23 18:23:45,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:46,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:46,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761459437] [2020-10-23 18:23:46,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:46,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:46,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941979710] [2020-10-23 18:23:46,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:46,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:46,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:46,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:46,062 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-10-23 18:23:46,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:46,256 INFO L93 Difference]: Finished difference Result 62 states and 97 transitions. [2020-10-23 18:23:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:46,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-23 18:23:46,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:46,270 INFO L225 Difference]: With dead ends: 62 [2020-10-23 18:23:46,270 INFO L226 Difference]: Without dead ends: 43 [2020-10-23 18:23:46,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:23:46,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-23 18:23:46,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2020-10-23 18:23:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:23:46,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 51 transitions. [2020-10-23 18:23:46,344 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 51 transitions. Word has length 17 [2020-10-23 18:23:46,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:46,344 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 51 transitions. [2020-10-23 18:23:46,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:46,345 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 51 transitions. [2020-10-23 18:23:46,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-23 18:23:46,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:46,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:46,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:23:46,348 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:46,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:46,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2133053400, now seen corresponding path program 1 times [2020-10-23 18:23:46,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:46,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820329354] [2020-10-23 18:23:46,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:46,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:46,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820329354] [2020-10-23 18:23:46,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:46,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:46,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407210232] [2020-10-23 18:23:46,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:46,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:46,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:46,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:46,515 INFO L87 Difference]: Start difference. First operand 32 states and 51 transitions. Second operand 4 states. [2020-10-23 18:23:46,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:46,668 INFO L93 Difference]: Finished difference Result 69 states and 115 transitions. [2020-10-23 18:23:46,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:46,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-23 18:23:46,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:46,670 INFO L225 Difference]: With dead ends: 69 [2020-10-23 18:23:46,671 INFO L226 Difference]: Without dead ends: 43 [2020-10-23 18:23:46,672 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 [2020-10-23 18:23:46,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-23 18:23:46,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-23 18:23:46,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-23 18:23:46,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 67 transitions. [2020-10-23 18:23:46,685 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 67 transitions. Word has length 17 [2020-10-23 18:23:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:46,686 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 67 transitions. [2020-10-23 18:23:46,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:46,686 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 67 transitions. [2020-10-23 18:23:46,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 18:23:46,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:46,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:46,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:23:46,688 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:46,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:46,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2099831584, now seen corresponding path program 1 times [2020-10-23 18:23:46,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:46,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685846016] [2020-10-23 18:23:46,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:46,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:46,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685846016] [2020-10-23 18:23:46,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:46,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:46,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908672665] [2020-10-23 18:23:46,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:46,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:46,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:46,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:46,772 INFO L87 Difference]: Start difference. First operand 42 states and 67 transitions. Second operand 4 states. [2020-10-23 18:23:46,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:46,973 INFO L93 Difference]: Finished difference Result 65 states and 102 transitions. [2020-10-23 18:23:46,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:46,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-23 18:23:46,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:46,975 INFO L225 Difference]: With dead ends: 65 [2020-10-23 18:23:46,975 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 18:23:46,976 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 [2020-10-23 18:23:46,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 18:23:46,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-23 18:23:46,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-23 18:23:46,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 69 transitions. [2020-10-23 18:23:46,989 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 69 transitions. Word has length 18 [2020-10-23 18:23:46,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:46,990 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 69 transitions. [2020-10-23 18:23:46,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:46,990 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 69 transitions. [2020-10-23 18:23:46,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 18:23:46,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:46,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:46,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:23:46,994 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:46,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:46,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1706804574, now seen corresponding path program 1 times [2020-10-23 18:23:46,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:46,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774540528] [2020-10-23 18:23:46,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:47,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:47,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774540528] [2020-10-23 18:23:47,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:47,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:47,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888639320] [2020-10-23 18:23:47,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:47,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:47,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:47,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:47,101 INFO L87 Difference]: Start difference. First operand 45 states and 69 transitions. Second operand 4 states. [2020-10-23 18:23:47,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:47,289 INFO L93 Difference]: Finished difference Result 113 states and 182 transitions. [2020-10-23 18:23:47,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:47,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-23 18:23:47,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:47,296 INFO L225 Difference]: With dead ends: 113 [2020-10-23 18:23:47,296 INFO L226 Difference]: Without dead ends: 77 [2020-10-23 18:23:47,297 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 [2020-10-23 18:23:47,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-23 18:23:47,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-23 18:23:47,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-23 18:23:47,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 118 transitions. [2020-10-23 18:23:47,309 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 118 transitions. Word has length 18 [2020-10-23 18:23:47,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:47,310 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 118 transitions. [2020-10-23 18:23:47,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:47,311 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 118 transitions. [2020-10-23 18:23:47,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 18:23:47,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:47,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:47,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:23:47,313 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:47,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1026746204, now seen corresponding path program 1 times [2020-10-23 18:23:47,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:47,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361133346] [2020-10-23 18:23:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:47,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:47,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361133346] [2020-10-23 18:23:47,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:47,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:47,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994175834] [2020-10-23 18:23:47,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:47,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:47,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:47,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:47,441 INFO L87 Difference]: Start difference. First operand 76 states and 118 transitions. Second operand 4 states. [2020-10-23 18:23:47,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:47,550 INFO L93 Difference]: Finished difference Result 96 states and 149 transitions. [2020-10-23 18:23:47,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:47,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-23 18:23:47,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:47,552 INFO L225 Difference]: With dead ends: 96 [2020-10-23 18:23:47,553 INFO L226 Difference]: Without dead ends: 93 [2020-10-23 18:23:47,553 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 [2020-10-23 18:23:47,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-23 18:23:47,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2020-10-23 18:23:47,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-23 18:23:47,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 116 transitions. [2020-10-23 18:23:47,568 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 116 transitions. Word has length 18 [2020-10-23 18:23:47,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:47,568 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 116 transitions. [2020-10-23 18:23:47,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:47,569 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 116 transitions. [2020-10-23 18:23:47,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:23:47,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:47,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:47,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 18:23:47,570 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:47,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:47,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1378003427, now seen corresponding path program 1 times [2020-10-23 18:23:47,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:47,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490683252] [2020-10-23 18:23:47,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:47,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:47,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490683252] [2020-10-23 18:23:47,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:47,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:47,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288263585] [2020-10-23 18:23:47,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:47,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:47,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:47,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:47,655 INFO L87 Difference]: Start difference. First operand 76 states and 116 transitions. Second operand 4 states. [2020-10-23 18:23:47,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:47,802 INFO L93 Difference]: Finished difference Result 132 states and 205 transitions. [2020-10-23 18:23:47,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:47,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-23 18:23:47,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:47,805 INFO L225 Difference]: With dead ends: 132 [2020-10-23 18:23:47,805 INFO L226 Difference]: Without dead ends: 129 [2020-10-23 18:23:47,806 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 [2020-10-23 18:23:47,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-23 18:23:47,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 104. [2020-10-23 18:23:47,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-23 18:23:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 158 transitions. [2020-10-23 18:23:47,822 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 158 transitions. Word has length 19 [2020-10-23 18:23:47,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:47,822 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 158 transitions. [2020-10-23 18:23:47,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:47,823 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 158 transitions. [2020-10-23 18:23:47,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:23:47,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:47,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:47,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:23:47,825 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:47,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:47,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2058061797, now seen corresponding path program 1 times [2020-10-23 18:23:47,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:47,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318212645] [2020-10-23 18:23:47,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:47,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:47,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318212645] [2020-10-23 18:23:47,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:47,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:47,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518936585] [2020-10-23 18:23:47,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:47,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:47,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:47,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:47,913 INFO L87 Difference]: Start difference. First operand 104 states and 158 transitions. Second operand 4 states. [2020-10-23 18:23:48,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:48,048 INFO L93 Difference]: Finished difference Result 232 states and 357 transitions. [2020-10-23 18:23:48,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:48,049 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-23 18:23:48,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:48,051 INFO L225 Difference]: With dead ends: 232 [2020-10-23 18:23:48,051 INFO L226 Difference]: Without dead ends: 137 [2020-10-23 18:23:48,052 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 [2020-10-23 18:23:48,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-23 18:23:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-23 18:23:48,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-23 18:23:48,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 200 transitions. [2020-10-23 18:23:48,079 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 200 transitions. Word has length 19 [2020-10-23 18:23:48,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:48,079 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 200 transitions. [2020-10-23 18:23:48,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:48,079 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 200 transitions. [2020-10-23 18:23:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 18:23:48,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:48,081 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] [2020-10-23 18:23:48,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 18:23:48,082 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:48,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:48,082 INFO L82 PathProgramCache]: Analyzing trace with hash -224886967, now seen corresponding path program 1 times [2020-10-23 18:23:48,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:48,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664348005] [2020-10-23 18:23:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:48,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:48,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664348005] [2020-10-23 18:23:48,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:48,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:48,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402925451] [2020-10-23 18:23:48,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:48,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:48,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:48,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:48,185 INFO L87 Difference]: Start difference. First operand 136 states and 200 transitions. Second operand 4 states. [2020-10-23 18:23:48,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:48,304 INFO L93 Difference]: Finished difference Result 206 states and 303 transitions. [2020-10-23 18:23:48,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:48,305 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-23 18:23:48,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:48,306 INFO L225 Difference]: With dead ends: 206 [2020-10-23 18:23:48,307 INFO L226 Difference]: Without dead ends: 143 [2020-10-23 18:23:48,308 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 [2020-10-23 18:23:48,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-23 18:23:48,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-23 18:23:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-23 18:23:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 204 transitions. [2020-10-23 18:23:48,324 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 204 transitions. Word has length 20 [2020-10-23 18:23:48,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:48,324 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 204 transitions. [2020-10-23 18:23:48,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:48,325 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 204 transitions. [2020-10-23 18:23:48,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 18:23:48,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:48,326 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] [2020-10-23 18:23:48,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 18:23:48,327 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:48,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:48,330 INFO L82 PathProgramCache]: Analyzing trace with hash -617913977, now seen corresponding path program 1 times [2020-10-23 18:23:48,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:48,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889623233] [2020-10-23 18:23:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:48,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:48,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:48,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889623233] [2020-10-23 18:23:48,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:48,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:48,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60997250] [2020-10-23 18:23:48,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:48,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:48,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:48,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:48,392 INFO L87 Difference]: Start difference. First operand 142 states and 204 transitions. Second operand 4 states. [2020-10-23 18:23:48,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:48,509 INFO L93 Difference]: Finished difference Result 238 states and 343 transitions. [2020-10-23 18:23:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:48,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-23 18:23:48,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:48,512 INFO L225 Difference]: With dead ends: 238 [2020-10-23 18:23:48,512 INFO L226 Difference]: Without dead ends: 235 [2020-10-23 18:23:48,513 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 [2020-10-23 18:23:48,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-23 18:23:48,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 202. [2020-10-23 18:23:48,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-23 18:23:48,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 284 transitions. [2020-10-23 18:23:48,536 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 284 transitions. Word has length 20 [2020-10-23 18:23:48,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:48,537 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 284 transitions. [2020-10-23 18:23:48,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:48,539 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 284 transitions. [2020-10-23 18:23:48,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 18:23:48,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:48,542 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] [2020-10-23 18:23:48,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 18:23:48,543 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:48,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:48,547 INFO L82 PathProgramCache]: Analyzing trace with hash 62144393, now seen corresponding path program 1 times [2020-10-23 18:23:48,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:48,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684412620] [2020-10-23 18:23:48,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:48,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:48,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684412620] [2020-10-23 18:23:48,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:48,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:48,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813858860] [2020-10-23 18:23:48,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:48,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:48,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:48,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:48,639 INFO L87 Difference]: Start difference. First operand 202 states and 284 transitions. Second operand 4 states. [2020-10-23 18:23:48,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:48,793 INFO L93 Difference]: Finished difference Result 446 states and 623 transitions. [2020-10-23 18:23:48,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:48,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-23 18:23:48,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:48,796 INFO L225 Difference]: With dead ends: 446 [2020-10-23 18:23:48,797 INFO L226 Difference]: Without dead ends: 259 [2020-10-23 18:23:48,801 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 [2020-10-23 18:23:48,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-23 18:23:48,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2020-10-23 18:23:48,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-23 18:23:48,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 344 transitions. [2020-10-23 18:23:48,821 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 344 transitions. Word has length 20 [2020-10-23 18:23:48,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:48,822 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 344 transitions. [2020-10-23 18:23:48,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:48,822 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 344 transitions. [2020-10-23 18:23:48,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:23:48,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:48,824 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] [2020-10-23 18:23:48,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 18:23:48,824 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:48,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:48,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1968773776, now seen corresponding path program 1 times [2020-10-23 18:23:48,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:48,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671833831] [2020-10-23 18:23:48,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:48,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:48,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671833831] [2020-10-23 18:23:48,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:48,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:48,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072782843] [2020-10-23 18:23:48,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:48,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:48,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:48,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:48,879 INFO L87 Difference]: Start difference. First operand 258 states and 344 transitions. Second operand 4 states. [2020-10-23 18:23:49,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:49,012 INFO L93 Difference]: Finished difference Result 386 states and 511 transitions. [2020-10-23 18:23:49,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:49,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-23 18:23:49,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:49,015 INFO L225 Difference]: With dead ends: 386 [2020-10-23 18:23:49,015 INFO L226 Difference]: Without dead ends: 267 [2020-10-23 18:23:49,016 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 [2020-10-23 18:23:49,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-23 18:23:49,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2020-10-23 18:23:49,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-23 18:23:49,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 344 transitions. [2020-10-23 18:23:49,031 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 344 transitions. Word has length 21 [2020-10-23 18:23:49,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:49,032 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 344 transitions. [2020-10-23 18:23:49,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:49,032 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 344 transitions. [2020-10-23 18:23:49,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:23:49,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:49,033 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] [2020-10-23 18:23:49,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 18:23:49,034 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:49,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:49,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1933166510, now seen corresponding path program 1 times [2020-10-23 18:23:49,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:49,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169601581] [2020-10-23 18:23:49,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:49,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:49,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169601581] [2020-10-23 18:23:49,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:49,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:49,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355123349] [2020-10-23 18:23:49,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:49,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:49,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:49,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:49,103 INFO L87 Difference]: Start difference. First operand 266 states and 344 transitions. Second operand 4 states. [2020-10-23 18:23:49,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:49,234 INFO L93 Difference]: Finished difference Result 429 states and 546 transitions. [2020-10-23 18:23:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:49,234 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-23 18:23:49,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:49,239 INFO L225 Difference]: With dead ends: 429 [2020-10-23 18:23:49,239 INFO L226 Difference]: Without dead ends: 426 [2020-10-23 18:23:49,241 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 [2020-10-23 18:23:49,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-23 18:23:49,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 394. [2020-10-23 18:23:49,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-23 18:23:49,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 496 transitions. [2020-10-23 18:23:49,270 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 496 transitions. Word has length 21 [2020-10-23 18:23:49,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:49,270 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 496 transitions. [2020-10-23 18:23:49,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:49,270 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 496 transitions. [2020-10-23 18:23:49,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:23:49,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:49,272 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] [2020-10-23 18:23:49,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 18:23:49,279 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:49,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:49,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1681742416, now seen corresponding path program 1 times [2020-10-23 18:23:49,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:49,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963754759] [2020-10-23 18:23:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:49,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:49,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:49,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963754759] [2020-10-23 18:23:49,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:49,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:49,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690417718] [2020-10-23 18:23:49,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:49,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:49,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:49,341 INFO L87 Difference]: Start difference. First operand 394 states and 496 transitions. Second operand 4 states. [2020-10-23 18:23:49,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:49,459 INFO L93 Difference]: Finished difference Result 858 states and 1056 transitions. [2020-10-23 18:23:49,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:49,460 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-23 18:23:49,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:49,460 INFO L225 Difference]: With dead ends: 858 [2020-10-23 18:23:49,460 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:23:49,463 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 [2020-10-23 18:23:49,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:23:49,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:23:49,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:23:49,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:23:49,464 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-10-23 18:23:49,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:49,464 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:23:49,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:49,464 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:23:49,464 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:23:49,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 18:23:49,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:23:49,876 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 32 [2020-10-23 18:23:49,926 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-23 18:23:49,927 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 18:23:49,927 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-23 18:23:49,927 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-23 18:23:49,927 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:23:49,927 INFO L270 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|)) [2020-10-23 18:23:49,928 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:23:49,928 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:23:49,928 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:23:49,928 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:23:49,928 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:23:49,928 INFO L274 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-10-23 18:23:49,928 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 6 95) no Hoare annotation was computed. [2020-10-23 18:23:49,928 INFO L277 CegarLoopResult]: At program point L85-1(lines 26 90) the Hoare annotation is: true [2020-10-23 18:23:49,928 INFO L274 CegarLoopResult]: For program point L81(line 81) no Hoare annotation was computed. [2020-10-23 18:23:49,929 INFO L274 CegarLoopResult]: For program point L65-1(lines 26 90) no Hoare annotation was computed. [2020-10-23 18:23:49,929 INFO L274 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-10-23 18:23:49,929 INFO L274 CegarLoopResult]: For program point L86(line 86) no Hoare annotation was computed. [2020-10-23 18:23:49,929 INFO L270 CegarLoopResult]: At program point L86-1(lines 7 95) the Hoare annotation is: false [2020-10-23 18:23:49,930 INFO L274 CegarLoopResult]: For program point L70-1(lines 26 90) no Hoare annotation was computed. [2020-10-23 18:23:49,930 INFO L274 CegarLoopResult]: For program point L66(line 66) no Hoare annotation was computed. [2020-10-23 18:23:49,931 INFO L277 CegarLoopResult]: At program point L91(lines 7 95) the Hoare annotation is: true [2020-10-23 18:23:49,931 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 6 95) no Hoare annotation was computed. [2020-10-23 18:23:49,931 INFO L274 CegarLoopResult]: For program point L75-1(lines 26 90) no Hoare annotation was computed. [2020-10-23 18:23:49,931 INFO L274 CegarLoopResult]: For program point L71(line 71) no Hoare annotation was computed. [2020-10-23 18:23:49,931 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 6 95) the Hoare annotation is: true [2020-10-23 18:23:49,931 INFO L274 CegarLoopResult]: For program point L59-1(lines 26 90) no Hoare annotation was computed. [2020-10-23 18:23:49,931 INFO L274 CegarLoopResult]: For program point L55-1(lines 26 90) no Hoare annotation was computed. [2020-10-23 18:23:49,931 INFO L274 CegarLoopResult]: For program point L51-1(lines 26 90) no Hoare annotation was computed. [2020-10-23 18:23:49,931 INFO L274 CegarLoopResult]: For program point L80-1(lines 26 90) no Hoare annotation was computed. [2020-10-23 18:23:49,932 INFO L274 CegarLoopResult]: For program point L47-1(lines 26 90) no Hoare annotation was computed. [2020-10-23 18:23:49,932 INFO L274 CegarLoopResult]: For program point L76(line 76) no Hoare annotation was computed. [2020-10-23 18:23:49,932 INFO L274 CegarLoopResult]: For program point L43(lines 43 45) no Hoare annotation was computed. [2020-10-23 18:23:49,933 INFO L274 CegarLoopResult]: For program point L43-2(lines 26 90) no Hoare annotation was computed. [2020-10-23 18:23:49,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:23:49 BoogieIcfgContainer [2020-10-23 18:23:49,946 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:23:49,955 INFO L168 Benchmark]: Toolchain (without parser) took 5425.74 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 126.6 MB in the beginning and 88.4 MB in the end (delta: 38.2 MB). Peak memory consumption was 97.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:23:49,956 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:23:49,957 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.53 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 116.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:23:49,958 INFO L168 Benchmark]: Boogie Preprocessor took 39.36 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 114.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:23:49,961 INFO L168 Benchmark]: RCFGBuilder took 644.97 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 134.0 MB in the end (delta: -19.1 MB). Peak memory consumption was 19.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:23:49,965 INFO L168 Benchmark]: TraceAbstraction took 4457.49 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 133.7 MB in the beginning and 88.4 MB in the end (delta: 45.4 MB). Peak memory consumption was 103.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:23:49,968 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 269.53 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 116.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.36 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 114.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 644.97 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 134.0 MB in the end (delta: -19.1 MB). Peak memory consumption was 19.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4457.49 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 133.7 MB in the beginning and 88.4 MB in the end (delta: 45.4 MB). Peak memory consumption was 103.6 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: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.8s, OverallIterations: 13, TraceHistogramMax: 1, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 627 SDtfs, 817 SDslu, 102 SDs, 0 SdLazy, 453 SolverSat, 46 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=394occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 125 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 20 PreInvPairs, 55 NumberOfFragments, 38 HoareAnnotationTreeSize, 20 FomulaSimplifications, 52502 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 249 NumberOfCodeBlocks, 249 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 236 ConstructedInterpolants, 0 QuantifiedInterpolants, 14210 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 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...