/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/recursive-simple/sum_20x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:18:53,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:18:53,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:18:53,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:18:53,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:18:53,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:18:53,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:18:53,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:18:53,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:18:53,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:18:53,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:18:53,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:18:53,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:18:53,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:18:53,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:18:53,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:18:53,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:18:53,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:18:53,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:18:53,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:18:53,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:18:53,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:18:53,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:18:53,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:18:53,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:18:53,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:18:53,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:18:53,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:18:53,887 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 18:18:53,914 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:18:53,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:18:53,916 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:18:53,916 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:18:53,917 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:18:53,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:18:53,917 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:18:53,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:18:53,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:18:53,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:18:53,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:18:53,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:18:53,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:18:53,919 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:18:53,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:18:53,919 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:18:53,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:18:53,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:18:53,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:18:53,920 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:18:53,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:18:53,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:18:53,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:18:53,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:18:53,922 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:18:53,922 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:18:53,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:18:53,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:18:53,923 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:18:53,923 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:18:54,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:18:54,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:18:54,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:18:54,316 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:18:54,316 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:18:54,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_20x0-1.c [2020-10-23 18:18:54,409 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c97f567b/c3a14460a42c4f7580d01c3c2d2a7099/FLAG0f5b9e048 [2020-10-23 18:18:54,986 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:18:54,987 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_20x0-1.c [2020-10-23 18:18:54,993 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c97f567b/c3a14460a42c4f7580d01c3c2d2a7099/FLAG0f5b9e048 [2020-10-23 18:18:55,375 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c97f567b/c3a14460a42c4f7580d01c3c2d2a7099 [2020-10-23 18:18:55,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:18:55,388 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:18:55,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:18:55,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:18:55,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:18:55,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:18:55" (1/1) ... [2020-10-23 18:18:55,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33672ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:55, skipping insertion in model container [2020-10-23 18:18:55,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:18:55" (1/1) ... [2020-10-23 18:18:55,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:18:55,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:18:55,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:18:55,579 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:18:55,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:18:55,611 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:18:55,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:55 WrapperNode [2020-10-23 18:18:55,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:18:55,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:18:55,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:18:55,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:18:55,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:55" (1/1) ... [2020-10-23 18:18:55,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:55" (1/1) ... [2020-10-23 18:18:55,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:55" (1/1) ... [2020-10-23 18:18:55,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:55" (1/1) ... [2020-10-23 18:18:55,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:55" (1/1) ... [2020-10-23 18:18:55,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:55" (1/1) ... [2020-10-23 18:18:55,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:55" (1/1) ... [2020-10-23 18:18:55,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:18:55,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:18:55,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:18:55,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:18:55,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:55" (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 18:18:55,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:18:55,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:18:55,724 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:18:55,724 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-10-23 18:18:55,724 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:18:55,725 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:18:55,725 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:18:55,725 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:18:55,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:18:55,725 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-10-23 18:18:55,725 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:18:55,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:18:55,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:18:55,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:18:55,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:18:55,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:18:55,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:18:55,966 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:18:55,967 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:18:55,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:18:55 BoogieIcfgContainer [2020-10-23 18:18:55,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:18:55,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:18:55,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:18:55,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:18:55,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:18:55" (1/3) ... [2020-10-23 18:18:55,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46545262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:18:55, skipping insertion in model container [2020-10-23 18:18:55,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:55" (2/3) ... [2020-10-23 18:18:55,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46545262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:18:55, skipping insertion in model container [2020-10-23 18:18:55,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:18:55" (3/3) ... [2020-10-23 18:18:55,981 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_20x0-1.c [2020-10-23 18:18:56,008 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:18:56,018 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:18:56,046 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:18:56,106 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:18:56,107 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:18:56,107 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:18:56,113 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:18:56,113 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:18:56,114 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:18:56,114 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:18:56,114 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:18:56,131 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-23 18:18:56,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:18:56,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:56,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:56,138 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:56,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:56,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2012080153, now seen corresponding path program 1 times [2020-10-23 18:18:56,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:56,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987990380] [2020-10-23 18:18:56,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:56,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:56,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:56,508 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 18:18:56,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987990380] [2020-10-23 18:18:56,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:18:56,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:18:56,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361527445] [2020-10-23 18:18:56,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:18:56,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:56,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:18:56,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:18:56,540 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-23 18:18:56,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:56,783 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-23 18:18:56,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:18:56,785 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:18:56,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:56,794 INFO L225 Difference]: With dead ends: 36 [2020-10-23 18:18:56,794 INFO L226 Difference]: Without dead ends: 20 [2020-10-23 18:18:56,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:18:56,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-23 18:18:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-23 18:18:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-23 18:18:56,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-23 18:18:56,844 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-23 18:18:56,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:56,845 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-23 18:18:56,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:18:56,845 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-23 18:18:56,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:18:56,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:56,847 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:56,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:18:56,848 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:56,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:56,849 INFO L82 PathProgramCache]: Analyzing trace with hash -292229313, now seen corresponding path program 1 times [2020-10-23 18:18:56,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:56,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460361844] [2020-10-23 18:18:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:56,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:56,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:56,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:18:57,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460361844] [2020-10-23 18:18:57,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630343282] [2020-10-23 18:18:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:57,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:18:57,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:18:57,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:57,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-10-23 18:18:57,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991214139] [2020-10-23 18:18:57,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:18:57,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:57,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:18:57,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:18:57,275 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-10-23 18:18:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:57,529 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-23 18:18:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:18:57,529 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-23 18:18:57,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:57,531 INFO L225 Difference]: With dead ends: 28 [2020-10-23 18:18:57,531 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 18:18:57,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:18:57,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 18:18:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-23 18:18:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-23 18:18:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-23 18:18:57,542 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-10-23 18:18:57,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:57,542 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-23 18:18:57,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:18:57,543 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-23 18:18:57,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:18:57,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:57,544 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:57,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:18:57,758 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:57,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1887732007, now seen corresponding path program 2 times [2020-10-23 18:18:57,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:57,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308761024] [2020-10-23 18:18:57,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:57,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:57,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:57,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:58,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:18:58,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308761024] [2020-10-23 18:18:58,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367831596] [2020-10-23 18:18:58,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:58,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:18:58,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:58,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-23 18:18:58,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:18:58,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:58,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2020-10-23 18:18:58,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153911855] [2020-10-23 18:18:58,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 18:18:58,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:58,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 18:18:58,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:18:58,340 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 16 states. [2020-10-23 18:18:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:58,778 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-23 18:18:58,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:18:58,778 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-10-23 18:18:58,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:58,780 INFO L225 Difference]: With dead ends: 31 [2020-10-23 18:18:58,780 INFO L226 Difference]: Without dead ends: 26 [2020-10-23 18:18:58,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:18:58,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-23 18:18:58,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-23 18:18:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 18:18:58,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-23 18:18:58,801 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-10-23 18:18:58,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:58,802 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-23 18:18:58,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 18:18:58,802 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-23 18:18:58,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:18:58,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:58,803 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:59,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:59,019 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:59,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:59,021 INFO L82 PathProgramCache]: Analyzing trace with hash 779050623, now seen corresponding path program 3 times [2020-10-23 18:18:59,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:59,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136492422] [2020-10-23 18:18:59,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:59,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:59,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:59,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:59,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:59,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:18:59,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136492422] [2020-10-23 18:18:59,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322461921] [2020-10-23 18:18:59,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:59,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-23 18:18:59,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:59,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:18:59,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:18:59,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:59,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-10-23 18:18:59,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362681199] [2020-10-23 18:18:59,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 18:18:59,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:59,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 18:18:59,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:18:59,331 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 10 states. [2020-10-23 18:18:59,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:59,643 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-23 18:18:59,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:18:59,644 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-23 18:18:59,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:59,645 INFO L225 Difference]: With dead ends: 34 [2020-10-23 18:18:59,645 INFO L226 Difference]: Without dead ends: 29 [2020-10-23 18:18:59,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:18:59,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-23 18:18:59,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-23 18:18:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 18:18:59,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-23 18:18:59,654 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 33 [2020-10-23 18:18:59,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:59,654 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-23 18:18:59,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 18:18:59,654 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-23 18:18:59,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:18:59,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:59,656 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:59,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:59,871 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:59,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:59,872 INFO L82 PathProgramCache]: Analyzing trace with hash -184104345, now seen corresponding path program 4 times [2020-10-23 18:18:59,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:59,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913442652] [2020-10-23 18:18:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:59,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:59,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:00,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:00,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:00,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:00,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-23 18:19:00,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913442652] [2020-10-23 18:19:00,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677233496] [2020-10-23 18:19:00,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:00,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:19:00,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:00,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:19:00,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-23 18:19:00,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:00,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-10-23 18:19:00,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485392396] [2020-10-23 18:19:00,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:19:00,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:00,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:19:00,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:19:00,314 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2020-10-23 18:19:00,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:00,665 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-23 18:19:00,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:19:00,666 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-23 18:19:00,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:00,667 INFO L225 Difference]: With dead ends: 37 [2020-10-23 18:19:00,667 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 18:19:00,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:19:00,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 18:19:00,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 18:19:00,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:19:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-23 18:19:00,676 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-10-23 18:19:00,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:00,676 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-23 18:19:00,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:19:00,677 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-23 18:19:00,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 18:19:00,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:00,678 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:00,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:00,889 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:00,890 INFO L82 PathProgramCache]: Analyzing trace with hash -6214209, now seen corresponding path program 5 times [2020-10-23 18:19:00,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:00,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214452503] [2020-10-23 18:19:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:00,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:00,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:00,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:01,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:01,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:01,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:01,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:01,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:19:01,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214452503] [2020-10-23 18:19:01,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809854681] [2020-10-23 18:19:01,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:01,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-23 18:19:01,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:01,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-23 18:19:01,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:19:01,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:01,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-10-23 18:19:01,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066933319] [2020-10-23 18:19:01,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:19:01,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:01,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:19:01,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:19:01,350 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 12 states. [2020-10-23 18:19:01,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:01,812 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-23 18:19:01,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:19:01,813 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-23 18:19:01,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:01,815 INFO L225 Difference]: With dead ends: 40 [2020-10-23 18:19:01,815 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 18:19:01,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:19:01,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 18:19:01,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-23 18:19:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 18:19:01,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-23 18:19:01,824 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2020-10-23 18:19:01,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:01,825 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-23 18:19:01,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:19:01,825 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-23 18:19:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-23 18:19:01,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:01,827 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:02,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 18:19:02,042 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:02,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:02,043 INFO L82 PathProgramCache]: Analyzing trace with hash -2097613913, now seen corresponding path program 6 times [2020-10-23 18:19:02,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:02,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305483218] [2020-10-23 18:19:02,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:02,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:02,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:02,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:02,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:02,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:02,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:02,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:02,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-23 18:19:02,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305483218] [2020-10-23 18:19:02,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778413830] [2020-10-23 18:19:02,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:02,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-23 18:19:02,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:02,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-23 18:19:02,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-23 18:19:02,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:02,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-10-23 18:19:02,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936130338] [2020-10-23 18:19:02,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:19:02,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:02,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:19:02,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:19:02,483 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-10-23 18:19:02,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:02,976 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-10-23 18:19:02,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:19:02,977 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-23 18:19:02,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:02,979 INFO L225 Difference]: With dead ends: 43 [2020-10-23 18:19:02,979 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 18:19:02,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:19:02,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 18:19:02,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-23 18:19:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:19:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-23 18:19:02,988 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 51 [2020-10-23 18:19:02,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:02,988 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-23 18:19:02,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:19:02,988 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-23 18:19:02,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-23 18:19:02,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:02,990 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:03,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:03,195 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:03,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:03,196 INFO L82 PathProgramCache]: Analyzing trace with hash -437625601, now seen corresponding path program 7 times [2020-10-23 18:19:03,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:03,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459143160] [2020-10-23 18:19:03,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:03,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:03,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:03,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:03,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:03,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:03,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:03,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:03,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:03,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:03,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-23 18:19:03,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459143160] [2020-10-23 18:19:03,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672782045] [2020-10-23 18:19:03,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:03,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-23 18:19:03,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-23 18:19:03,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:03,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-10-23 18:19:03,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801684455] [2020-10-23 18:19:03,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:19:03,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:03,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:19:03,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:19:03,656 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2020-10-23 18:19:04,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:04,194 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-23 18:19:04,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:19:04,197 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-23 18:19:04,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:04,198 INFO L225 Difference]: With dead ends: 46 [2020-10-23 18:19:04,198 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 18:19:04,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:19:04,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 18:19:04,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-23 18:19:04,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 18:19:04,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-23 18:19:04,210 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 57 [2020-10-23 18:19:04,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:04,211 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-23 18:19:04,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:19:04,211 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-23 18:19:04,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-23 18:19:04,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:04,216 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:04,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:04,418 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:04,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:04,419 INFO L82 PathProgramCache]: Analyzing trace with hash 331021543, now seen corresponding path program 8 times [2020-10-23 18:19:04,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:04,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565213779] [2020-10-23 18:19:04,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:04,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:04,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:04,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:04,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:04,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:04,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:04,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:04,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:04,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:04,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-23 18:19:04,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565213779] [2020-10-23 18:19:04,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82790740] [2020-10-23 18:19:04,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:04,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:19:04,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:04,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-23 18:19:04,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-23 18:19:04,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:04,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2020-10-23 18:19:04,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171183158] [2020-10-23 18:19:04,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:19:04,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:04,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:19:04,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:19:04,950 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2020-10-23 18:19:05,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:05,542 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-23 18:19:05,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:19:05,543 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-10-23 18:19:05,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:05,544 INFO L225 Difference]: With dead ends: 49 [2020-10-23 18:19:05,544 INFO L226 Difference]: Without dead ends: 44 [2020-10-23 18:19:05,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-23 18:19:05,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-23 18:19:05,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-23 18:19:05,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:19:05,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-23 18:19:05,553 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 63 [2020-10-23 18:19:05,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:05,553 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-23 18:19:05,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:19:05,554 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-23 18:19:05,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-23 18:19:05,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:05,555 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:05,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-23 18:19:05,760 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:05,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:05,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1458901953, now seen corresponding path program 9 times [2020-10-23 18:19:05,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:05,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584767566] [2020-10-23 18:19:05,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:05,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:05,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:05,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:05,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:05,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:05,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:05,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:06,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:06,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:06,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:06,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-23 18:19:06,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584767566] [2020-10-23 18:19:06,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002297623] [2020-10-23 18:19:06,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:06,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-23 18:19:06,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:06,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 44 conjunts are in the unsatisfiable core [2020-10-23 18:19:06,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-23 18:19:06,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:06,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 37 [2020-10-23 18:19:06,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987232368] [2020-10-23 18:19:06,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-23 18:19:06,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:06,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-23 18:19:06,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2020-10-23 18:19:06,916 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 37 states. [2020-10-23 18:19:08,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:08,503 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-10-23 18:19:08,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-23 18:19:08,504 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 69 [2020-10-23 18:19:08,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:08,506 INFO L225 Difference]: With dead ends: 52 [2020-10-23 18:19:08,506 INFO L226 Difference]: Without dead ends: 47 [2020-10-23 18:19:08,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=603, Invalid=2703, Unknown=0, NotChecked=0, Total=3306 [2020-10-23 18:19:08,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-23 18:19:08,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-23 18:19:08,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 18:19:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-23 18:19:08,522 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 69 [2020-10-23 18:19:08,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:08,522 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-23 18:19:08,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-23 18:19:08,523 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-23 18:19:08,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-23 18:19:08,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:08,525 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:08,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:08,727 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:08,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:08,727 INFO L82 PathProgramCache]: Analyzing trace with hash 749528615, now seen corresponding path program 10 times [2020-10-23 18:19:08,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:08,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315482450] [2020-10-23 18:19:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:08,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:08,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:08,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:08,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:08,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:08,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:08,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:09,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:09,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:09,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:09,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:09,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-23 18:19:09,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315482450] [2020-10-23 18:19:09,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464386098] [2020-10-23 18:19:09,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:09,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:19:09,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:09,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-23 18:19:09,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-23 18:19:09,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:09,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2020-10-23 18:19:09,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023674053] [2020-10-23 18:19:09,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 18:19:09,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:09,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 18:19:09,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:19:09,329 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 17 states. [2020-10-23 18:19:09,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:09,991 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-10-23 18:19:09,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:19:09,991 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2020-10-23 18:19:09,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:09,993 INFO L225 Difference]: With dead ends: 55 [2020-10-23 18:19:09,993 INFO L226 Difference]: Without dead ends: 50 [2020-10-23 18:19:09,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-23 18:19:09,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-23 18:19:10,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-23 18:19:10,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-23 18:19:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-23 18:19:10,003 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 75 [2020-10-23 18:19:10,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:10,003 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-23 18:19:10,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 18:19:10,004 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-23 18:19:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-23 18:19:10,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:10,005 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:10,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:10,219 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:10,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:10,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1422056319, now seen corresponding path program 11 times [2020-10-23 18:19:10,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:10,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657666670] [2020-10-23 18:19:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-23 18:19:10,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657666670] [2020-10-23 18:19:10,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553111493] [2020-10-23 18:19:10,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:10,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-23 18:19:10,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:10,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-23 18:19:10,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-23 18:19:10,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:10,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2020-10-23 18:19:10,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91871165] [2020-10-23 18:19:10,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 18:19:10,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:10,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 18:19:10,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:19:10,924 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 18 states. [2020-10-23 18:19:11,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:11,683 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-10-23 18:19:11,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 18:19:11,683 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-10-23 18:19:11,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:11,685 INFO L225 Difference]: With dead ends: 58 [2020-10-23 18:19:11,685 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 18:19:11,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2020-10-23 18:19:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 18:19:11,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-23 18:19:11,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 18:19:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-23 18:19:11,694 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 81 [2020-10-23 18:19:11,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:11,695 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-23 18:19:11,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 18:19:11,695 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-23 18:19:11,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-23 18:19:11,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:11,697 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:11,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-23 18:19:11,910 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:11,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:11,911 INFO L82 PathProgramCache]: Analyzing trace with hash -550588569, now seen corresponding path program 12 times [2020-10-23 18:19:11,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:11,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444695722] [2020-10-23 18:19:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:11,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:11,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-23 18:19:12,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444695722] [2020-10-23 18:19:12,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472472294] [2020-10-23 18:19:12,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:12,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-23 18:19:12,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:12,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-23 18:19:12,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-23 18:19:12,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:12,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2020-10-23 18:19:12,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935128089] [2020-10-23 18:19:12,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:19:12,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:12,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:19:12,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:19:12,600 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 19 states. [2020-10-23 18:19:13,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:13,385 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-23 18:19:13,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 18:19:13,385 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2020-10-23 18:19:13,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:13,387 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:19:13,387 INFO L226 Difference]: Without dead ends: 56 [2020-10-23 18:19:13,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=370, Invalid=752, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 18:19:13,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-23 18:19:13,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-23 18:19:13,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-23 18:19:13,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-23 18:19:13,397 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 87 [2020-10-23 18:19:13,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:13,397 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-23 18:19:13,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:19:13,397 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-23 18:19:13,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-23 18:19:13,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:13,399 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:13,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-23 18:19:13,613 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:13,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:13,614 INFO L82 PathProgramCache]: Analyzing trace with hash 953297599, now seen corresponding path program 13 times [2020-10-23 18:19:13,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:13,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957105451] [2020-10-23 18:19:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:13,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:13,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:13,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:13,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:13,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:13,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:13,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:13,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:13,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:13,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-23 18:19:14,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957105451] [2020-10-23 18:19:14,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728403928] [2020-10-23 18:19:14,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-23 18:19:14,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-23 18:19:14,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:14,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2020-10-23 18:19:14,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067619365] [2020-10-23 18:19:14,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 18:19:14,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:14,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 18:19:14,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:19:14,401 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 20 states. [2020-10-23 18:19:15,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:15,223 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-10-23 18:19:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 18:19:15,224 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-10-23 18:19:15,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:15,225 INFO L225 Difference]: With dead ends: 64 [2020-10-23 18:19:15,225 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 18:19:15,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=418, Invalid=842, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 18:19:15,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 18:19:15,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-23 18:19:15,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 18:19:15,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-23 18:19:15,233 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 93 [2020-10-23 18:19:15,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:15,234 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-23 18:19:15,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 18:19:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-23 18:19:15,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-23 18:19:15,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:15,235 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:15,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-23 18:19:15,450 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:15,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:15,450 INFO L82 PathProgramCache]: Analyzing trace with hash -929015641, now seen corresponding path program 14 times [2020-10-23 18:19:15,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:15,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752585913] [2020-10-23 18:19:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:15,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:15,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:15,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:15,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:15,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:15,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:15,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:15,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:15,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:15,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:15,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:15,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:15,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:15,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:15,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:16,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-23 18:19:16,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752585913] [2020-10-23 18:19:16,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478850300] [2020-10-23 18:19:16,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:16,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:19:16,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:16,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-23 18:19:16,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-23 18:19:16,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:16,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2020-10-23 18:19:16,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540997147] [2020-10-23 18:19:16,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 18:19:16,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:16,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 18:19:16,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-10-23 18:19:16,262 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 21 states. [2020-10-23 18:19:17,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:17,170 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-10-23 18:19:17,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 18:19:17,171 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 99 [2020-10-23 18:19:17,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:17,172 INFO L225 Difference]: With dead ends: 67 [2020-10-23 18:19:17,172 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 18:19:17,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2020-10-23 18:19:17,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 18:19:17,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-23 18:19:17,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-23 18:19:17,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-23 18:19:17,183 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 99 [2020-10-23 18:19:17,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:17,183 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-23 18:19:17,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 18:19:17,183 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-23 18:19:17,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-23 18:19:17,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:17,185 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:17,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:17,399 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:17,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:17,400 INFO L82 PathProgramCache]: Analyzing trace with hash -386344449, now seen corresponding path program 15 times [2020-10-23 18:19:17,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:17,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936905091] [2020-10-23 18:19:17,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:17,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:17,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:17,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:17,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:17,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:17,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:17,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:17,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:17,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:17,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:17,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:17,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:17,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:17,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:17,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:17,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:17,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:17,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-23 18:19:18,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936905091] [2020-10-23 18:19:18,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302223972] [2020-10-23 18:19:18,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:18,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-23 18:19:18,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:18,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-23 18:19:18,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-23 18:19:18,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:18,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2020-10-23 18:19:18,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679170117] [2020-10-23 18:19:18,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 18:19:18,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:18,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 18:19:18,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:19:18,252 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 22 states. [2020-10-23 18:19:19,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:19,214 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-10-23 18:19:19,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 18:19:19,214 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 105 [2020-10-23 18:19:19,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:19,216 INFO L225 Difference]: With dead ends: 70 [2020-10-23 18:19:19,216 INFO L226 Difference]: Without dead ends: 65 [2020-10-23 18:19:19,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=523, Invalid=1037, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 18:19:19,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-23 18:19:19,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-23 18:19:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 18:19:19,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-23 18:19:19,225 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 105 [2020-10-23 18:19:19,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:19,225 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-23 18:19:19,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 18:19:19,226 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-23 18:19:19,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-23 18:19:19,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:19,227 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:19,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-23 18:19:19,442 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:19,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:19,443 INFO L82 PathProgramCache]: Analyzing trace with hash 308404711, now seen corresponding path program 16 times [2020-10-23 18:19:19,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:19,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474910074] [2020-10-23 18:19:19,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:19,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:19,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:19,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:19,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:19,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:19,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:19,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:19,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:19,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:19,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:19,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:19,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:19,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:19,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:19,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:19,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-23 18:19:20,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474910074] [2020-10-23 18:19:20,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901938729] [2020-10-23 18:19:20,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:20,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:19:20,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:20,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-23 18:19:20,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-23 18:19:20,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:20,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2020-10-23 18:19:20,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151715688] [2020-10-23 18:19:20,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 18:19:20,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:20,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 18:19:20,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:19:20,321 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 23 states. [2020-10-23 18:19:21,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:21,330 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-10-23 18:19:21,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 18:19:21,331 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2020-10-23 18:19:21,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:21,332 INFO L225 Difference]: With dead ends: 73 [2020-10-23 18:19:21,332 INFO L226 Difference]: Without dead ends: 68 [2020-10-23 18:19:21,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=580, Invalid=1142, Unknown=0, NotChecked=0, Total=1722 [2020-10-23 18:19:21,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-23 18:19:21,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-23 18:19:21,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-23 18:19:21,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-23 18:19:21,344 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 111 [2020-10-23 18:19:21,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:21,345 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-23 18:19:21,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 18:19:21,345 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-23 18:19:21,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-23 18:19:21,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:21,346 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:21,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-23 18:19:21,562 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:21,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:21,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1022814527, now seen corresponding path program 17 times [2020-10-23 18:19:21,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:21,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667617521] [2020-10-23 18:19:21,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:21,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:21,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:21,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:21,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:21,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:21,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:21,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:21,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:21,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-23 18:19:22,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667617521] [2020-10-23 18:19:22,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899296547] [2020-10-23 18:19:22,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:22,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-10-23 18:19:22,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:22,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-23 18:19:22,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-23 18:19:22,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:22,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2020-10-23 18:19:22,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053245951] [2020-10-23 18:19:22,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 18:19:22,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:22,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 18:19:22,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:19:22,801 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 24 states. [2020-10-23 18:19:23,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:23,907 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-10-23 18:19:23,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-23 18:19:23,907 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2020-10-23 18:19:23,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:23,909 INFO L225 Difference]: With dead ends: 76 [2020-10-23 18:19:23,909 INFO L226 Difference]: Without dead ends: 71 [2020-10-23 18:19:23,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=640, Invalid=1252, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 18:19:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-23 18:19:23,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-23 18:19:23,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-23 18:19:23,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-23 18:19:23,917 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 117 [2020-10-23 18:19:23,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:23,917 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-23 18:19:23,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 18:19:23,918 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-23 18:19:23,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-23 18:19:23,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:23,919 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:24,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-23 18:19:24,133 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:24,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:24,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1909672743, now seen corresponding path program 18 times [2020-10-23 18:19:24,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:24,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494969141] [2020-10-23 18:19:24,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:25,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:25,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-23 18:19:25,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494969141] [2020-10-23 18:19:25,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717620966] [2020-10-23 18:19:25,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:25,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-10-23 18:19:25,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:25,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 80 conjunts are in the unsatisfiable core [2020-10-23 18:19:25,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-23 18:19:27,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:27,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43] total 64 [2020-10-23 18:19:27,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002974966] [2020-10-23 18:19:27,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-23 18:19:27,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:27,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-23 18:19:27,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=3410, Unknown=0, NotChecked=0, Total=4032 [2020-10-23 18:19:27,331 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 64 states. [2020-10-23 18:19:30,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:30,881 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-10-23 18:19:30,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-23 18:19:30,881 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 123 [2020-10-23 18:19:30,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:30,883 INFO L225 Difference]: With dead ends: 79 [2020-10-23 18:19:30,883 INFO L226 Difference]: Without dead ends: 74 [2020-10-23 18:19:30,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2218 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1899, Invalid=8607, Unknown=0, NotChecked=0, Total=10506 [2020-10-23 18:19:30,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-23 18:19:30,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-23 18:19:30,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-23 18:19:30,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-23 18:19:30,893 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 123 [2020-10-23 18:19:30,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:30,893 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-23 18:19:30,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-23 18:19:30,893 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-23 18:19:30,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-23 18:19:30,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:30,894 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:31,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:31,111 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:31,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:31,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1351374975, now seen corresponding path program 19 times [2020-10-23 18:19:31,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:31,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787202142] [2020-10-23 18:19:31,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-23 18:19:32,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787202142] [2020-10-23 18:19:32,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458357760] [2020-10-23 18:19:32,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:32,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-23 18:19:32,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-23 18:19:32,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:32,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2020-10-23 18:19:32,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364003704] [2020-10-23 18:19:32,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-23 18:19:32,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:32,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-23 18:19:32,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2020-10-23 18:19:32,350 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 26 states. [2020-10-23 18:19:33,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:33,565 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-10-23 18:19:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 18:19:33,566 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 129 [2020-10-23 18:19:33,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:33,567 INFO L225 Difference]: With dead ends: 82 [2020-10-23 18:19:33,567 INFO L226 Difference]: Without dead ends: 77 [2020-10-23 18:19:33,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=769, Invalid=1487, Unknown=0, NotChecked=0, Total=2256 [2020-10-23 18:19:33,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-23 18:19:33,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-23 18:19:33,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-23 18:19:33,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-23 18:19:33,575 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 129 [2020-10-23 18:19:33,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:33,575 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-23 18:19:33,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-23 18:19:33,575 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-23 18:19:33,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-23 18:19:33,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:33,577 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:33,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:33,791 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:33,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:33,792 INFO L82 PathProgramCache]: Analyzing trace with hash 676631655, now seen corresponding path program 20 times [2020-10-23 18:19:33,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:33,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3943551] [2020-10-23 18:19:33,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:19:33,832 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:19:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:19:33,889 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:19:33,935 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:19:33,936 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:19:33,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-23 18:19:34,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:19:34 BoogieIcfgContainer [2020-10-23 18:19:34,028 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:19:34,030 INFO L168 Benchmark]: Toolchain (without parser) took 38646.68 ms. Allocated memory was 165.7 MB in the beginning and 531.6 MB in the end (delta: 366.0 MB). Free memory was 140.6 MB in the beginning and 424.3 MB in the end (delta: -283.7 MB). Peak memory consumption was 83.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:19:34,030 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 165.7 MB. Free memory is still 137.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:19:34,031 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.50 ms. Allocated memory is still 165.7 MB. Free memory was 140.0 MB in the beginning and 131.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:19:34,031 INFO L168 Benchmark]: Boogie Preprocessor took 31.58 ms. Allocated memory is still 165.7 MB. Free memory was 131.0 MB in the beginning and 129.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:19:34,032 INFO L168 Benchmark]: RCFGBuilder took 323.76 ms. Allocated memory is still 165.7 MB. Free memory was 129.5 MB in the beginning and 117.3 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:19:34,032 INFO L168 Benchmark]: TraceAbstraction took 38057.45 ms. Allocated memory was 165.7 MB in the beginning and 531.6 MB in the end (delta: 366.0 MB). Free memory was 116.9 MB in the beginning and 424.3 MB in the end (delta: -307.4 MB). Peak memory consumption was 59.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:19:34,034 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 165.7 MB. Free memory is still 137.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 220.50 ms. Allocated memory is still 165.7 MB. Free memory was 140.0 MB in the beginning and 131.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.58 ms. Allocated memory is still 165.7 MB. Free memory was 131.0 MB in the beginning and 129.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 323.76 ms. Allocated memory is still 165.7 MB. Free memory was 129.5 MB in the beginning and 117.3 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 38057.45 ms. Allocated memory was 165.7 MB in the beginning and 531.6 MB in the end (delta: 366.0 MB). Free memory was 116.9 MB in the beginning and 424.3 MB in the end (delta: -307.4 MB). Peak memory consumption was 59.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int a = 20; [L15] int b = 0; VAL [a=20, b=0] [L16] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=20] [L6] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=20, m=0, n=20] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19] [L6] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=19, m=1, n=19] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18] [L6] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=18, m=2, n=18] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=17, m=3, n=17] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=16, m=4, n=16] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15] [L6] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=15, m=5, n=15] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14] [L6] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=14, m=6, n=14] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13] [L6] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=13, m=7, n=13] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12] [L6] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=12, m=8, n=12] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11] [L6] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=11, m=9, n=11] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10] [L6] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=10, m=10, n=10] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9] [L6] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=9, m=11, n=9] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8] [L6] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=8, m=12, n=8] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7] [L6] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=7, m=13, n=7] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6] [L6] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=6, m=14, n=6] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5] [L6] COND FALSE !(n <= 0) VAL [\old(m)=15, \old(n)=5, m=15, n=5] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4] [L6] COND FALSE !(n <= 0) VAL [\old(m)=16, \old(n)=4, m=16, n=4] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3] [L6] COND FALSE !(n <= 0) VAL [\old(m)=17, \old(n)=3, m=17, n=3] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=18, \old(n)=2, m=18, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=19, \old(n)=1, m=19, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=20, \old(n)=0, \result=20, m=20, n=0] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1, m=19, n=1, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2, m=18, n=2, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3, m=17, n=3, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4, m=16, n=4, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5, m=15, n=5, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6, m=14, n=6, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7, m=13, n=7, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8, m=12, n=8, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9, m=11, n=9, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10, m=10, n=10, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11, m=9, n=11, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12, m=8, n=12, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13, m=7, n=13, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14, m=6, n=14, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15, m=5, n=15, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16, m=4, n=16, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17, m=3, n=17, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18, m=2, n=18, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19, m=1, n=19, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=20, m=0, n=20, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) VAL [a=20, b=0, sum(a, b)=20] [L16] int result = sum(a, b); [L17] COND TRUE result == a + b VAL [a=20, b=0, result=20] [L18] CALL reach_error() [L3] __assert_fail("0", "sum_20x0-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 37.8s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 17.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 260 SDtfs, 1286 SDslu, 706 SDs, 0 SdLazy, 2136 SolverSat, 872 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2415 GetRequests, 1780 SyntacticMatches, 0 SemanticMatches, 635 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5640 ImplicationChecksByTransitivity, 19.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 13.6s InterpolantComputationTime, 3000 NumberOfCodeBlocks, 3000 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2826 ConstructedInterpolants, 0 QuantifiedInterpolants, 684748 SizeOfPredicates, 237 NumberOfNonLiveVariables, 5377 ConjunctsInSsa, 526 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 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 incorrect! Received shutdown request...