/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:06:48,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:06:48,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:06:48,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:06:48,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:06:48,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:06:48,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:06:48,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:06:48,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:06:48,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:06:48,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:06:48,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:06:48,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:06:48,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:06:48,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:06:48,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:06:48,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:06:48,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:06:48,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:06:48,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:06:48,426 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 [2021-05-02 14:06:48,447 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:06:48,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:06:48,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:06:48,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:06:48,449 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:06:48,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:06:48,450 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:06:48,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:06:48,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:06:48,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:06:48,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:06:48,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:06:48,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:06:48,451 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:06:48,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:06:48,451 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:06:48,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:06:48,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:06:48,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:06:48,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:06:48,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:06:48,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:06:48,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:06:48,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:06:48,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:06:48,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:06:48,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:06:48,453 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:06:48,453 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:06:48,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:06:48,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:06:48,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:06:48,775 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:06:48,777 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:06:48,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound10.c [2021-05-02 14:06:48,844 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/785c47945/ce508caf96ca41ab992f7d84076ab034/FLAG8489d0d21 [2021-05-02 14:06:49,330 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:06:49,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound10.c [2021-05-02 14:06:49,338 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/785c47945/ce508caf96ca41ab992f7d84076ab034/FLAG8489d0d21 [2021-05-02 14:06:49,714 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/785c47945/ce508caf96ca41ab992f7d84076ab034 [2021-05-02 14:06:49,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:06:49,724 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:06:49,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:06:49,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:06:49,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:06:49,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:06:49" (1/1) ... [2021-05-02 14:06:49,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71fe8753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:49, skipping insertion in model container [2021-05-02 14:06:49,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:06:49" (1/1) ... [2021-05-02 14:06:49,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:06:49,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:06:49,869 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound10.c[576,589] [2021-05-02 14:06:49,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:06:49,894 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:06:49,904 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound10.c[576,589] [2021-05-02 14:06:49,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:06:49,930 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:06:49,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:49 WrapperNode [2021-05-02 14:06:49,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:06:49,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:06:49,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:06:49,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:06:49,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:49" (1/1) ... [2021-05-02 14:06:49,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:49" (1/1) ... [2021-05-02 14:06:49,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:49" (1/1) ... [2021-05-02 14:06:49,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:49" (1/1) ... [2021-05-02 14:06:49,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:49" (1/1) ... [2021-05-02 14:06:50,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:49" (1/1) ... [2021-05-02 14:06:50,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:49" (1/1) ... [2021-05-02 14:06:50,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:06:50,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:06:50,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:06:50,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:06:50,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:06:50,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:06:50,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:06:50,083 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:06:50,083 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:06:50,083 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:06:50,083 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:06:50,084 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:06:50,084 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:06:50,085 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:06:50,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:06:50,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:06:50,085 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:06:50,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:06:50,086 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:06:50,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:06:50,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:06:50,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:06:50,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:06:50,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:06:50,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:06:50,416 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:06:50,417 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:06:50,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:06:50 BoogieIcfgContainer [2021-05-02 14:06:50,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:06:50,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:06:50,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:06:50,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:06:50,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:06:49" (1/3) ... [2021-05-02 14:06:50,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d81d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:06:50, skipping insertion in model container [2021-05-02 14:06:50,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:49" (2/3) ... [2021-05-02 14:06:50,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d81d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:06:50, skipping insertion in model container [2021-05-02 14:06:50,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:06:50" (3/3) ... [2021-05-02 14:06:50,430 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound10.c [2021-05-02 14:06:50,434 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:06:50,437 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:06:50,449 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:06:50,467 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:06:50,467 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:06:50,467 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:06:50,467 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:06:50,467 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:06:50,467 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:06:50,467 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:06:50,467 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:06:50,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 14:06:50,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 14:06:50,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:50,487 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:50,487 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:50,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:50,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1588022502, now seen corresponding path program 1 times [2021-05-02 14:06:50,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:50,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139823915] [2021-05-02 14:06:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:50,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:06:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:50,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:06:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:06:50,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:50,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139823915] [2021-05-02 14:06:50,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139823915] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:06:50,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:06:50,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:06:50,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591944449] [2021-05-02 14:06:50,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:06:50,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:50,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:06:50,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:06:50,810 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:06:51,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:51,003 INFO L93 Difference]: Finished difference Result 68 states and 101 transitions. [2021-05-02 14:06:51,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:06:51,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 14:06:51,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:51,011 INFO L225 Difference]: With dead ends: 68 [2021-05-02 14:06:51,011 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 14:06:51,014 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:06:51,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 14:06:51,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 14:06:51,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:06:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-05-02 14:06:51,068 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2021-05-02 14:06:51,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:51,069 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-05-02 14:06:51,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:06:51,069 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-05-02 14:06:51,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 14:06:51,070 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:51,070 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:51,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:06:51,071 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:51,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:51,072 INFO L82 PathProgramCache]: Analyzing trace with hash 766070672, now seen corresponding path program 1 times [2021-05-02 14:06:51,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:51,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735885984] [2021-05-02 14:06:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:51,110 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:51,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724357870] [2021-05-02 14:06:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:51,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:06:51,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:51,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:51,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:51,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:51,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:51,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:06:51,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:51,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735885984] [2021-05-02 14:06:51,297 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:51,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724357870] [2021-05-02 14:06:51,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724357870] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:06:51,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:06:51,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 14:06:51,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059743795] [2021-05-02 14:06:51,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 14:06:51,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:51,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 14:06:51,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:06:51,300 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:06:51,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:51,316 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-02 14:06:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 14:06:51,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 14:06:51,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:51,318 INFO L225 Difference]: With dead ends: 42 [2021-05-02 14:06:51,318 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:06:51,319 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:06:51,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:06:51,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 14:06:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:06:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 14:06:51,327 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2021-05-02 14:06:51,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:51,327 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 14:06:51,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:06:51,328 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 14:06:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 14:06:51,328 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:51,328 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:51,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:06:51,537 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:51,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:51,537 INFO L82 PathProgramCache]: Analyzing trace with hash 767560222, now seen corresponding path program 1 times [2021-05-02 14:06:51,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:51,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971860347] [2021-05-02 14:06:51,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:51,548 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:51,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200923233] [2021-05-02 14:06:51,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:51,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:06:51,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:51,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:51,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:06:51,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:51,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971860347] [2021-05-02 14:06:51,734 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:51,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200923233] [2021-05-02 14:06:51,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200923233] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:06:51,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:06:51,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 14:06:51,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839399890] [2021-05-02 14:06:51,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:06:51,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:51,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:06:51,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:06:51,736 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:06:51,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:51,920 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-02 14:06:51,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:06:51,921 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 14:06:51,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:51,922 INFO L225 Difference]: With dead ends: 45 [2021-05-02 14:06:51,922 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 14:06:51,922 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:06:51,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 14:06:51,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 14:06:51,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 14:06:51,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-02 14:06:51,947 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2021-05-02 14:06:51,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:51,947 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-02 14:06:51,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:06:51,948 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-02 14:06:51,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 14:06:51,948 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:51,949 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:52,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:52,173 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:52,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:52,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1016228092, now seen corresponding path program 1 times [2021-05-02 14:06:52,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:52,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110724767] [2021-05-02 14:06:52,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:52,190 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:52,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781621716] [2021-05-02 14:06:52,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:52,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:06:52,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:52,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:06:52,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:52,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110724767] [2021-05-02 14:06:52,352 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:52,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781621716] [2021-05-02 14:06:52,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781621716] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:06:52,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:06:52,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 14:06:52,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948261737] [2021-05-02 14:06:52,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:06:52,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:52,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:06:52,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:06:52,354 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:06:52,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:52,475 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-05-02 14:06:52,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:06:52,476 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 14:06:52,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:52,478 INFO L225 Difference]: With dead ends: 58 [2021-05-02 14:06:52,479 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 14:06:52,480 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:06:52,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 14:06:52,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 14:06:52,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 14:06:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-05-02 14:06:52,497 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2021-05-02 14:06:52,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:52,497 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-05-02 14:06:52,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:06:52,498 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-05-02 14:06:52,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 14:06:52,498 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:52,499 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:52,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:52,723 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:52,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:52,723 INFO L82 PathProgramCache]: Analyzing trace with hash 2019703110, now seen corresponding path program 1 times [2021-05-02 14:06:52,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:52,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159408272] [2021-05-02 14:06:52,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:52,736 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:52,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558998737] [2021-05-02 14:06:52,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:52,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:06:52,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:52,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:06:52,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:52,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159408272] [2021-05-02 14:06:52,938 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:52,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558998737] [2021-05-02 14:06:52,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558998737] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:06:52,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:06:52,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 14:06:52,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704590322] [2021-05-02 14:06:52,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:06:52,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:52,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:06:52,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:06:52,946 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:06:53,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:53,078 INFO L93 Difference]: Finished difference Result 83 states and 113 transitions. [2021-05-02 14:06:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:06:53,079 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-05-02 14:06:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:53,082 INFO L225 Difference]: With dead ends: 83 [2021-05-02 14:06:53,083 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 14:06:53,083 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:06:53,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 14:06:53,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-05-02 14:06:53,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:06:53,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2021-05-02 14:06:53,121 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2021-05-02 14:06:53,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:53,121 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2021-05-02 14:06:53,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:06:53,122 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2021-05-02 14:06:53,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 14:06:53,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:53,123 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:53,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:53,329 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:53,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:53,330 INFO L82 PathProgramCache]: Analyzing trace with hash 202176206, now seen corresponding path program 1 times [2021-05-02 14:06:53,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:53,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658191848] [2021-05-02 14:06:53,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:53,341 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:53,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003310707] [2021-05-02 14:06:53,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:53,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:06:53,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:53,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:06:53,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:53,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658191848] [2021-05-02 14:06:53,513 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:53,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003310707] [2021-05-02 14:06:53,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003310707] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:06:53,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:06:53,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:06:53,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578932624] [2021-05-02 14:06:53,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:06:53,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:53,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:06:53,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:06:53,515 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:06:53,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:53,558 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2021-05-02 14:06:53,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:06:53,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 14:06:53,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:53,561 INFO L225 Difference]: With dead ends: 113 [2021-05-02 14:06:53,561 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 14:06:53,562 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:06:53,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 14:06:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 14:06:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:06:53,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2021-05-02 14:06:53,573 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2021-05-02 14:06:53,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:53,573 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2021-05-02 14:06:53,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:06:53,573 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2021-05-02 14:06:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 14:06:53,574 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:53,574 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:53,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:06:53,781 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:53,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:53,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1813008070, now seen corresponding path program 1 times [2021-05-02 14:06:53,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:53,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108368443] [2021-05-02 14:06:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:53,792 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:53,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415743304] [2021-05-02 14:06:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:53,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 14:06:53,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:53,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:06:53,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:53,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108368443] [2021-05-02 14:06:53,949 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:53,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415743304] [2021-05-02 14:06:53,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415743304] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:06:53,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:06:53,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 14:06:53,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304432039] [2021-05-02 14:06:53,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:06:53,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:53,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:06:53,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:06:53,951 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:06:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:54,027 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2021-05-02 14:06:54,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:06:54,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 14:06:54,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:54,028 INFO L225 Difference]: With dead ends: 84 [2021-05-02 14:06:54,029 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 14:06:54,029 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:06:54,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 14:06:54,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-02 14:06:54,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:06:54,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-05-02 14:06:54,039 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2021-05-02 14:06:54,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:54,039 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-05-02 14:06:54,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:06:54,040 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-05-02 14:06:54,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 14:06:54,040 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:54,041 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:54,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:54,261 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:54,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:54,261 INFO L82 PathProgramCache]: Analyzing trace with hash -683043127, now seen corresponding path program 1 times [2021-05-02 14:06:54,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:54,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917625422] [2021-05-02 14:06:54,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:54,271 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:54,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184283146] [2021-05-02 14:06:54,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:54,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:06:54,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:54,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:54,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:54,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:54,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:54,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:54,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:54,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:54,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:54,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:54,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:54,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:54,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:06:54,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:54,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917625422] [2021-05-02 14:06:54,506 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:54,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184283146] [2021-05-02 14:06:54,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184283146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:54,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:54,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:06:54,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267270816] [2021-05-02 14:06:54,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:06:54,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:54,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:06:54,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:06:54,508 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:06:54,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:54,661 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2021-05-02 14:06:54,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:06:54,662 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2021-05-02 14:06:54,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:54,664 INFO L225 Difference]: With dead ends: 88 [2021-05-02 14:06:54,664 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 14:06:54,666 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:06:54,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 14:06:54,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-02 14:06:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:06:54,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-05-02 14:06:54,685 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2021-05-02 14:06:54,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:54,685 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-05-02 14:06:54,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:06:54,685 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-05-02 14:06:54,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 14:06:54,689 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:54,689 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:54,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:54,909 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:54,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:54,909 INFO L82 PathProgramCache]: Analyzing trace with hash -589126939, now seen corresponding path program 1 times [2021-05-02 14:06:54,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:54,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986614779] [2021-05-02 14:06:54,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:54,917 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:54,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989880891] [2021-05-02 14:06:54,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:54,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:06:54,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:54,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:54,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:54,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:06:55,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:55,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986614779] [2021-05-02 14:06:55,110 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:55,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989880891] [2021-05-02 14:06:55,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989880891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:55,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:55,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:06:55,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016893058] [2021-05-02 14:06:55,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:06:55,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:55,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:06:55,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:06:55,115 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:06:55,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:55,174 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2021-05-02 14:06:55,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:06:55,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-05-02 14:06:55,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:55,178 INFO L225 Difference]: With dead ends: 115 [2021-05-02 14:06:55,178 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 14:06:55,178 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:06:55,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 14:06:55,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2021-05-02 14:06:55,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.161764705882353) internal successors, (79), 71 states have internal predecessors, (79), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 14:06:55,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2021-05-02 14:06:55,202 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 50 [2021-05-02 14:06:55,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:55,202 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2021-05-02 14:06:55,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:06:55,202 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2021-05-02 14:06:55,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 14:06:55,208 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:55,208 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:55,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:06:55,432 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:55,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:55,433 INFO L82 PathProgramCache]: Analyzing trace with hash -484699953, now seen corresponding path program 1 times [2021-05-02 14:06:55,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:55,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405589258] [2021-05-02 14:06:55,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:55,444 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:55,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956658801] [2021-05-02 14:06:55,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:55,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 14:06:55,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:55,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 14:06:55,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:55,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405589258] [2021-05-02 14:06:55,738 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:55,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956658801] [2021-05-02 14:06:55,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956658801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:55,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:55,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:06:55,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466500652] [2021-05-02 14:06:55,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:06:55,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:55,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:06:55,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:06:55,739 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:06:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:55,933 INFO L93 Difference]: Finished difference Result 159 states and 194 transitions. [2021-05-02 14:06:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:06:55,933 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2021-05-02 14:06:55,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:55,937 INFO L225 Difference]: With dead ends: 159 [2021-05-02 14:06:55,937 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 14:06:55,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:06:55,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 14:06:55,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-02 14:06:55,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 68 states have internal predecessors, (75), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 14:06:55,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2021-05-02 14:06:55,955 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 55 [2021-05-02 14:06:55,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:55,955 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2021-05-02 14:06:55,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:06:55,956 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2021-05-02 14:06:55,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 14:06:55,958 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:55,958 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:56,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:56,182 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:56,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:56,183 INFO L82 PathProgramCache]: Analyzing trace with hash 765609565, now seen corresponding path program 1 times [2021-05-02 14:06:56,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:56,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034948743] [2021-05-02 14:06:56,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:56,194 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:56,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272379136] [2021-05-02 14:06:56,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:56,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:06:56,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:56,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:06:56,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:56,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034948743] [2021-05-02 14:06:56,360 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:56,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272379136] [2021-05-02 14:06:56,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272379136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:56,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:56,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:06:56,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621090653] [2021-05-02 14:06:56,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:06:56,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:56,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:06:56,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:06:56,361 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:06:56,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:56,418 INFO L93 Difference]: Finished difference Result 149 states and 181 transitions. [2021-05-02 14:06:56,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:06:56,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 58 [2021-05-02 14:06:56,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:56,421 INFO L225 Difference]: With dead ends: 149 [2021-05-02 14:06:56,421 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 14:06:56,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:06:56,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 14:06:56,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-02 14:06:56,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 70 states have internal predecessors, (78), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 14:06:56,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-05-02 14:06:56,430 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 58 [2021-05-02 14:06:56,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:56,430 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-05-02 14:06:56,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:06:56,431 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-05-02 14:06:56,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 14:06:56,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:56,431 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:56,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:56,650 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:56,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:56,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1361251212, now seen corresponding path program 1 times [2021-05-02 14:06:56,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:56,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218641651] [2021-05-02 14:06:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:56,661 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:56,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410604239] [2021-05-02 14:06:56,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:56,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:06:56,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:56,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 14:06:56,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:56,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218641651] [2021-05-02 14:06:56,861 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:56,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410604239] [2021-05-02 14:06:56,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410604239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:56,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:56,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:06:56,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739709631] [2021-05-02 14:06:56,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:06:56,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:56,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:06:56,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:06:56,863 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:06:56,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:56,930 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2021-05-02 14:06:56,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:06:56,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 74 [2021-05-02 14:06:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:56,932 INFO L225 Difference]: With dead ends: 135 [2021-05-02 14:06:56,932 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 14:06:56,933 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:06:56,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 14:06:56,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-05-02 14:06:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 84 states have internal predecessors, (92), 28 states have call successors, (28), 17 states have call predecessors, (28), 16 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 14:06:56,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2021-05-02 14:06:56,943 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 74 [2021-05-02 14:06:56,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:56,943 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2021-05-02 14:06:56,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:06:56,943 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2021-05-02 14:06:56,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 14:06:56,944 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:56,944 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:57,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:06:57,159 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:57,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:57,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1777426592, now seen corresponding path program 1 times [2021-05-02 14:06:57,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:57,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260808568] [2021-05-02 14:06:57,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:57,167 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:57,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79508685] [2021-05-02 14:06:57,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:57,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 14:06:57,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:57,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-05-02 14:06:57,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:57,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260808568] [2021-05-02 14:06:57,795 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:57,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79508685] [2021-05-02 14:06:57,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79508685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:57,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:57,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 14:06:57,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599432420] [2021-05-02 14:06:57,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 14:06:57,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:57,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 14:06:57,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:06:57,797 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 14:06:58,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:58,160 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2021-05-02 14:06:58,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:06:58,161 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 79 [2021-05-02 14:06:58,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:58,162 INFO L225 Difference]: With dead ends: 158 [2021-05-02 14:06:58,162 INFO L226 Difference]: Without dead ends: 155 [2021-05-02 14:06:58,162 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:06:58,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-02 14:06:58,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-05-02 14:06:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 98 states have internal predecessors, (110), 37 states have call successors, (37), 19 states have call predecessors, (37), 18 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 14:06:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 182 transitions. [2021-05-02 14:06:58,176 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 182 transitions. Word has length 79 [2021-05-02 14:06:58,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:58,177 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 182 transitions. [2021-05-02 14:06:58,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 14:06:58,177 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 182 transitions. [2021-05-02 14:06:58,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 14:06:58,178 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:58,178 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:58,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:06:58,393 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:58,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:58,393 INFO L82 PathProgramCache]: Analyzing trace with hash -554329876, now seen corresponding path program 2 times [2021-05-02 14:06:58,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:58,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117039274] [2021-05-02 14:06:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:58,401 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:58,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539202036] [2021-05-02 14:06:58,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:58,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:06:58,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:06:58,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:06:58,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:58,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:58,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:58,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:58,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:58,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:58,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:58,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:58,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:58,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:58,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:58,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:58,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:58,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:58,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 22 proven. 140 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 14:06:58,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:58,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117039274] [2021-05-02 14:06:58,612 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:58,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539202036] [2021-05-02 14:06:58,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539202036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:58,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:58,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:06:58,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166950751] [2021-05-02 14:06:58,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:06:58,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:58,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:06:58,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:06:58,614 INFO L87 Difference]: Start difference. First operand 151 states and 182 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:06:58,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:58,728 INFO L93 Difference]: Finished difference Result 197 states and 242 transitions. [2021-05-02 14:06:58,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:06:58,729 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 82 [2021-05-02 14:06:58,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:58,730 INFO L225 Difference]: With dead ends: 197 [2021-05-02 14:06:58,730 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 14:06:58,732 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:06:58,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 14:06:58,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-05-02 14:06:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.153061224489796) internal successors, (113), 100 states have internal predecessors, (113), 37 states have call successors, (37), 19 states have call predecessors, (37), 18 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 14:06:58,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2021-05-02 14:06:58,748 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 82 [2021-05-02 14:06:58,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:58,750 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2021-05-02 14:06:58,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:06:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2021-05-02 14:06:58,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 14:06:58,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:58,753 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:58,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:06:58,978 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:58,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:58,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1891783602, now seen corresponding path program 1 times [2021-05-02 14:06:58,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:58,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518732721] [2021-05-02 14:06:58,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:58,994 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:58,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652319209] [2021-05-02 14:06:58,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:59,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 14:06:59,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:59,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 27 proven. 191 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-02 14:06:59,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:59,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518732721] [2021-05-02 14:06:59,229 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:59,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652319209] [2021-05-02 14:06:59,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652319209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:59,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:59,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:06:59,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695120797] [2021-05-02 14:06:59,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:06:59,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:59,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:06:59,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:06:59,231 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 14:06:59,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:59,347 INFO L93 Difference]: Finished difference Result 223 states and 269 transitions. [2021-05-02 14:06:59,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:06:59,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 90 [2021-05-02 14:06:59,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:59,350 INFO L225 Difference]: With dead ends: 223 [2021-05-02 14:06:59,350 INFO L226 Difference]: Without dead ends: 180 [2021-05-02 14:06:59,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:06:59,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-02 14:06:59,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2021-05-02 14:06:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 114 states have (on average 1.131578947368421) internal successors, (129), 116 states have internal predecessors, (129), 41 states have call successors, (41), 23 states have call predecessors, (41), 22 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 14:06:59,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 209 transitions. [2021-05-02 14:06:59,370 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 209 transitions. Word has length 90 [2021-05-02 14:06:59,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:59,371 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 209 transitions. [2021-05-02 14:06:59,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 14:06:59,372 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 209 transitions. [2021-05-02 14:06:59,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 14:06:59,373 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:59,374 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:59,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:59,593 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:59,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:59,594 INFO L82 PathProgramCache]: Analyzing trace with hash -768653053, now seen corresponding path program 2 times [2021-05-02 14:06:59,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:59,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019131641] [2021-05-02 14:06:59,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:59,606 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:59,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115436032] [2021-05-02 14:06:59,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:59,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:06:59,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:06:59,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 14:06:59,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:59,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 26 proven. 270 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 14:06:59,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:59,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019131641] [2021-05-02 14:06:59,825 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:59,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115436032] [2021-05-02 14:06:59,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115436032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:59,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:59,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:06:59,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731181679] [2021-05-02 14:06:59,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:06:59,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:59,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:06:59,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:06:59,826 INFO L87 Difference]: Start difference. First operand 178 states and 209 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:06:59,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:59,963 INFO L93 Difference]: Finished difference Result 188 states and 219 transitions. [2021-05-02 14:06:59,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:06:59,964 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 98 [2021-05-02 14:06:59,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:59,965 INFO L225 Difference]: With dead ends: 188 [2021-05-02 14:06:59,965 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 14:06:59,965 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:06:59,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 14:06:59,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-05-02 14:06:59,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 119 states have internal predecessors, (132), 41 states have call successors, (41), 23 states have call predecessors, (41), 22 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 14:06:59,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 212 transitions. [2021-05-02 14:06:59,978 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 212 transitions. Word has length 98 [2021-05-02 14:06:59,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:59,979 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 212 transitions. [2021-05-02 14:06:59,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:06:59,979 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 212 transitions. [2021-05-02 14:06:59,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 14:06:59,980 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:59,980 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:07:00,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 14:07:00,193 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:00,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:00,193 INFO L82 PathProgramCache]: Analyzing trace with hash -721908367, now seen corresponding path program 2 times [2021-05-02 14:07:00,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:00,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455943573] [2021-05-02 14:07:00,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:00,200 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:00,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434486962] [2021-05-02 14:07:00,201 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:00,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:07:00,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:00,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:07:00,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:00,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:00,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:00,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:00,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:00,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:00,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:00,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:00,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:00,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:00,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:00,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:00,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 51 proven. 40 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 14:07:00,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:00,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455943573] [2021-05-02 14:07:00,561 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:00,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434486962] [2021-05-02 14:07:00,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434486962] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:00,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:00,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:07:00,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201801214] [2021-05-02 14:07:00,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:07:00,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:00,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:07:00,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:07:00,563 INFO L87 Difference]: Start difference. First operand 181 states and 212 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 14:07:00,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:00,985 INFO L93 Difference]: Finished difference Result 216 states and 258 transitions. [2021-05-02 14:07:00,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:07:00,986 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 103 [2021-05-02 14:07:00,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:00,987 INFO L225 Difference]: With dead ends: 216 [2021-05-02 14:07:00,987 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 14:07:00,988 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:07:00,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 14:07:01,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2021-05-02 14:07:01,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 134 states have (on average 1.1417910447761195) internal successors, (153), 136 states have internal predecessors, (153), 50 states have call successors, (50), 26 states have call predecessors, (50), 25 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 14:07:01,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 251 transitions. [2021-05-02 14:07:01,004 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 251 transitions. Word has length 103 [2021-05-02 14:07:01,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:01,004 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 251 transitions. [2021-05-02 14:07:01,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 14:07:01,005 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 251 transitions. [2021-05-02 14:07:01,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 14:07:01,006 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:01,006 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:07:01,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 14:07:01,221 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:01,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:01,221 INFO L82 PathProgramCache]: Analyzing trace with hash 447330249, now seen corresponding path program 3 times [2021-05-02 14:07:01,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:01,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528916692] [2021-05-02 14:07:01,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:01,226 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:01,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121743946] [2021-05-02 14:07:01,226 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:01,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-02 14:07:01,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:01,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 14:07:01,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:01,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 86 proven. 36 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-05-02 14:07:01,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:01,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528916692] [2021-05-02 14:07:01,604 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:01,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121743946] [2021-05-02 14:07:01,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121743946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:01,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:01,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:07:01,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026452978] [2021-05-02 14:07:01,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:07:01,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:01,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:07:01,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:07:01,607 INFO L87 Difference]: Start difference. First operand 210 states and 251 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:07:08,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:08,068 INFO L93 Difference]: Finished difference Result 295 states and 356 transitions. [2021-05-02 14:07:08,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:07:08,068 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 106 [2021-05-02 14:07:08,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:08,070 INFO L225 Difference]: With dead ends: 295 [2021-05-02 14:07:08,070 INFO L226 Difference]: Without dead ends: 243 [2021-05-02 14:07:08,071 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:07:08,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-02 14:07:08,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 235. [2021-05-02 14:07:08,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.105263157894737) internal successors, (168), 155 states have internal predecessors, (168), 52 states have call successors, (52), 31 states have call predecessors, (52), 30 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 14:07:08,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 270 transitions. [2021-05-02 14:07:08,088 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 270 transitions. Word has length 106 [2021-05-02 14:07:08,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:08,088 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 270 transitions. [2021-05-02 14:07:08,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:07:08,088 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 270 transitions. [2021-05-02 14:07:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 14:07:08,089 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:08,090 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:07:08,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 14:07:08,314 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:08,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:08,314 INFO L82 PathProgramCache]: Analyzing trace with hash 436746049, now seen corresponding path program 2 times [2021-05-02 14:07:08,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:08,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160197472] [2021-05-02 14:07:08,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:08,322 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:08,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618306650] [2021-05-02 14:07:08,323 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:08,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:07:08,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:08,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 14:07:08,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:08,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 102 proven. 18 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-05-02 14:07:08,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:08,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160197472] [2021-05-02 14:07:08,631 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:08,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618306650] [2021-05-02 14:07:08,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618306650] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:08,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:08,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:07:08,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477256378] [2021-05-02 14:07:08,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:07:08,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:08,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:07:08,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:07:08,633 INFO L87 Difference]: Start difference. First operand 235 states and 270 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 14:07:08,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:08,793 INFO L93 Difference]: Finished difference Result 346 states and 416 transitions. [2021-05-02 14:07:08,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:07:08,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 114 [2021-05-02 14:07:08,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:08,796 INFO L225 Difference]: With dead ends: 346 [2021-05-02 14:07:08,796 INFO L226 Difference]: Without dead ends: 247 [2021-05-02 14:07:08,797 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:07:08,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-02 14:07:08,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 227. [2021-05-02 14:07:08,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 146 states have (on average 1.13013698630137) internal successors, (165), 150 states have internal predecessors, (165), 54 states have call successors, (54), 27 states have call predecessors, (54), 26 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-02 14:07:08,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 271 transitions. [2021-05-02 14:07:08,838 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 271 transitions. Word has length 114 [2021-05-02 14:07:08,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:08,838 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 271 transitions. [2021-05-02 14:07:08,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 14:07:08,838 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 271 transitions. [2021-05-02 14:07:08,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 14:07:08,839 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:08,839 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:07:09,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:09,062 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:09,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:09,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2077207105, now seen corresponding path program 3 times [2021-05-02 14:07:09,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:09,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045893685] [2021-05-02 14:07:09,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:09,071 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:09,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571693169] [2021-05-02 14:07:09,072 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:09,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:07:09,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:09,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 14:07:09,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:09,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:09,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:09,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:09,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 106 proven. 18 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-05-02 14:07:09,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:09,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045893685] [2021-05-02 14:07:09,350 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:09,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571693169] [2021-05-02 14:07:09,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571693169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:09,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:09,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:07:09,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403980667] [2021-05-02 14:07:09,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:07:09,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:09,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:07:09,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:07:09,352 INFO L87 Difference]: Start difference. First operand 227 states and 271 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:07:11,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:11,610 INFO L93 Difference]: Finished difference Result 238 states and 283 transitions. [2021-05-02 14:07:11,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:07:11,611 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 114 [2021-05-02 14:07:11,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:11,613 INFO L225 Difference]: With dead ends: 238 [2021-05-02 14:07:11,613 INFO L226 Difference]: Without dead ends: 227 [2021-05-02 14:07:11,613 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:07:11,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-02 14:07:11,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2021-05-02 14:07:11,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 143 states have (on average 1.118881118881119) internal successors, (160), 147 states have internal predecessors, (160), 54 states have call successors, (54), 28 states have call predecessors, (54), 27 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 14:07:11,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 265 transitions. [2021-05-02 14:07:11,630 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 265 transitions. Word has length 114 [2021-05-02 14:07:11,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:11,630 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 265 transitions. [2021-05-02 14:07:11,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:07:11,630 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 265 transitions. [2021-05-02 14:07:11,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 14:07:11,631 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:11,631 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:07:11,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:11,853 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:11,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:11,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1338024082, now seen corresponding path program 4 times [2021-05-02 14:07:11,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:11,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124911973] [2021-05-02 14:07:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:11,860 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:11,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9404406] [2021-05-02 14:07:11,860 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:11,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:07:11,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:11,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 14:07:11,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:11,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 45 proven. 81 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 14:07:12,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:12,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124911973] [2021-05-02 14:07:12,416 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:12,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9404406] [2021-05-02 14:07:12,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9404406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:12,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:12,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:07:12,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369055576] [2021-05-02 14:07:12,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:07:12,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:12,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:07:12,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:07:12,418 INFO L87 Difference]: Start difference. First operand 225 states and 265 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 14:07:12,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:12,951 INFO L93 Difference]: Finished difference Result 289 states and 347 transitions. [2021-05-02 14:07:12,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 14:07:12,952 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) Word has length 122 [2021-05-02 14:07:12,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:12,954 INFO L225 Difference]: With dead ends: 289 [2021-05-02 14:07:12,954 INFO L226 Difference]: Without dead ends: 282 [2021-05-02 14:07:12,954 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:07:12,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-02 14:07:12,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 277. [2021-05-02 14:07:12,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 174 states have (on average 1.132183908045977) internal successors, (197), 178 states have internal predecessors, (197), 70 states have call successors, (70), 33 states have call predecessors, (70), 32 states have return successors, (67), 65 states have call predecessors, (67), 67 states have call successors, (67) [2021-05-02 14:07:12,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 334 transitions. [2021-05-02 14:07:12,974 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 334 transitions. Word has length 122 [2021-05-02 14:07:12,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:12,974 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 334 transitions. [2021-05-02 14:07:12,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 14:07:12,974 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 334 transitions. [2021-05-02 14:07:12,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 14:07:12,975 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:12,975 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:07:13,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 14:07:13,191 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:13,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:13,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1198671626, now seen corresponding path program 3 times [2021-05-02 14:07:13,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:13,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451919082] [2021-05-02 14:07:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:13,197 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:13,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938663982] [2021-05-02 14:07:13,197 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:13,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 14:07:13,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:13,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:07:13,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:15,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 100 proven. 12 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2021-05-02 14:07:15,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:15,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451919082] [2021-05-02 14:07:15,511 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:15,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938663982] [2021-05-02 14:07:15,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938663982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:15,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:15,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:07:15,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700149162] [2021-05-02 14:07:15,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:07:15,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:15,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:07:15,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2021-05-02 14:07:15,512 INFO L87 Difference]: Start difference. First operand 277 states and 334 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 14:07:21,582 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 14:07:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:50,203 INFO L93 Difference]: Finished difference Result 311 states and 383 transitions. [2021-05-02 14:07:50,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:07:50,206 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 130 [2021-05-02 14:07:50,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:50,207 INFO L225 Difference]: With dead ends: 311 [2021-05-02 14:07:50,207 INFO L226 Difference]: Without dead ends: 304 [2021-05-02 14:07:50,207 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8145.7ms TimeCoverageRelationStatistics Valid=40, Invalid=114, Unknown=2, NotChecked=0, Total=156 [2021-05-02 14:07:50,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-02 14:07:50,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 234. [2021-05-02 14:07:50,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 149 states have (on average 1.1073825503355705) internal successors, (165), 154 states have internal predecessors, (165), 55 states have call successors, (55), 30 states have call predecessors, (55), 29 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-02 14:07:50,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 272 transitions. [2021-05-02 14:07:50,221 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 272 transitions. Word has length 130 [2021-05-02 14:07:50,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:50,221 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 272 transitions. [2021-05-02 14:07:50,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 14:07:50,222 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 272 transitions. [2021-05-02 14:07:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 14:07:50,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:50,225 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:07:50,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 14:07:50,441 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:50,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:50,441 INFO L82 PathProgramCache]: Analyzing trace with hash 518951120, now seen corresponding path program 4 times [2021-05-02 14:07:50,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:50,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362000383] [2021-05-02 14:07:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:50,447 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:50,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313350657] [2021-05-02 14:07:50,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:50,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:07:50,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:50,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 14:07:50,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:50,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:50,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:51,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:51,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:51,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:51,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:51,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:51,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 49 proven. 103 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-05-02 14:07:51,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:51,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362000383] [2021-05-02 14:07:51,165 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:51,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313350657] [2021-05-02 14:07:51,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313350657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:51,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:51,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 14:07:51,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455831619] [2021-05-02 14:07:51,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 14:07:51,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:51,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 14:07:51,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:07:51,167 INFO L87 Difference]: Start difference. First operand 234 states and 272 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 14:07:51,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:51,912 INFO L93 Difference]: Finished difference Result 377 states and 444 transitions. [2021-05-02 14:07:51,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:07:51,913 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) Word has length 138 [2021-05-02 14:07:51,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:51,914 INFO L225 Difference]: With dead ends: 377 [2021-05-02 14:07:51,915 INFO L226 Difference]: Without dead ends: 274 [2021-05-02 14:07:51,915 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 319.7ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-02 14:07:51,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-02 14:07:51,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2021-05-02 14:07:51,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 174 states have (on average 1.0977011494252873) internal successors, (191), 179 states have internal predecessors, (191), 61 states have call successors, (61), 35 states have call predecessors, (61), 34 states have return successors, (58), 55 states have call predecessors, (58), 58 states have call successors, (58) [2021-05-02 14:07:51,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 310 transitions. [2021-05-02 14:07:51,952 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 310 transitions. Word has length 138 [2021-05-02 14:07:51,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:51,952 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 310 transitions. [2021-05-02 14:07:51,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 14:07:51,952 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 310 transitions. [2021-05-02 14:07:51,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 14:07:51,954 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:51,954 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:07:52,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:52,169 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:52,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:52,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1738824718, now seen corresponding path program 5 times [2021-05-02 14:07:52,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:52,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700126746] [2021-05-02 14:07:52,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:52,176 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:52,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329346081] [2021-05-02 14:07:52,176 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:52,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-02 14:07:52,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:52,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 14:07:52,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:52,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 481 proven. 1 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-05-02 14:07:52,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:52,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700126746] [2021-05-02 14:07:52,459 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:52,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329346081] [2021-05-02 14:07:52,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329346081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:52,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:52,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:07:52,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818844214] [2021-05-02 14:07:52,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:07:52,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:52,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:07:52,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:07:52,461 INFO L87 Difference]: Start difference. First operand 270 states and 310 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 14:07:52,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:52,520 INFO L93 Difference]: Finished difference Result 373 states and 431 transitions. [2021-05-02 14:07:52,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:07:52,521 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 154 [2021-05-02 14:07:52,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:52,522 INFO L225 Difference]: With dead ends: 373 [2021-05-02 14:07:52,522 INFO L226 Difference]: Without dead ends: 195 [2021-05-02 14:07:52,523 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:07:52,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-02 14:07:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2021-05-02 14:07:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 124 states have (on average 1.0725806451612903) internal successors, (133), 129 states have internal predecessors, (133), 43 states have call successors, (43), 27 states have call predecessors, (43), 25 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 14:07:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 214 transitions. [2021-05-02 14:07:52,535 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 214 transitions. Word has length 154 [2021-05-02 14:07:52,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:52,536 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 214 transitions. [2021-05-02 14:07:52,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 14:07:52,536 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 214 transitions. [2021-05-02 14:07:52,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 14:07:52,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:52,537 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:07:52,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 14:07:52,752 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:52,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:52,752 INFO L82 PathProgramCache]: Analyzing trace with hash -208343713, now seen corresponding path program 6 times [2021-05-02 14:07:52,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:52,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662569740] [2021-05-02 14:07:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:52,759 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:52,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800299902] [2021-05-02 14:07:52,759 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:52,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 14:07:52,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:52,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:07:52,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:52,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:52,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 51 proven. 983 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-05-02 14:07:53,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:53,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662569740] [2021-05-02 14:07:53,119 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:53,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800299902] [2021-05-02 14:07:53,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800299902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:53,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:53,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:07:53,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536741970] [2021-05-02 14:07:53,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:07:53,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:53,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:07:53,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:07:53,122 INFO L87 Difference]: Start difference. First operand 193 states and 214 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 10 states have call successors, (27), 10 states have call predecessors, (27), 8 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-02 14:07:53,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:53,364 INFO L93 Difference]: Finished difference Result 308 states and 339 transitions. [2021-05-02 14:07:53,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 14:07:53,365 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 10 states have call successors, (27), 10 states have call predecessors, (27), 8 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) Word has length 162 [2021-05-02 14:07:53,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:53,366 INFO L225 Difference]: With dead ends: 308 [2021-05-02 14:07:53,366 INFO L226 Difference]: Without dead ends: 294 [2021-05-02 14:07:53,367 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:07:53,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-02 14:07:53,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 286. [2021-05-02 14:07:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 185 states have (on average 1.0648648648648649) internal successors, (197), 191 states have internal predecessors, (197), 62 states have call successors, (62), 40 states have call predecessors, (62), 38 states have return successors, (57), 54 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 14:07:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 316 transitions. [2021-05-02 14:07:53,390 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 316 transitions. Word has length 162 [2021-05-02 14:07:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:53,390 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 316 transitions. [2021-05-02 14:07:53,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 10 states have call successors, (27), 10 states have call predecessors, (27), 8 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-02 14:07:53,391 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 316 transitions. [2021-05-02 14:07:53,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-02 14:07:53,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:53,393 INFO L523 BasicCegarLoop]: trace histogram [27, 26, 26, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:07:53,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:53,613 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:53,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:53,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1040885898, now seen corresponding path program 5 times [2021-05-02 14:07:53,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:53,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563622141] [2021-05-02 14:07:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:53,629 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:53,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500961028] [2021-05-02 14:07:53,629 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:53,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-02 14:07:53,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:53,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:07:53,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:53,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:53,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:54,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:54,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 52 proven. 1284 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-05-02 14:07:54,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:54,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563622141] [2021-05-02 14:07:54,029 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:54,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500961028] [2021-05-02 14:07:54,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500961028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:54,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:54,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:07:54,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615599208] [2021-05-02 14:07:54,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:07:54,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:54,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:07:54,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:07:54,030 INFO L87 Difference]: Start difference. First operand 286 states and 316 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 11 states have call successors, (30), 11 states have call predecessors, (30), 9 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-02 14:07:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:54,307 INFO L93 Difference]: Finished difference Result 357 states and 397 transitions. [2021-05-02 14:07:54,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:07:54,308 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 11 states have call successors, (30), 11 states have call predecessors, (30), 9 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) Word has length 178 [2021-05-02 14:07:54,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:54,310 INFO L225 Difference]: With dead ends: 357 [2021-05-02 14:07:54,310 INFO L226 Difference]: Without dead ends: 350 [2021-05-02 14:07:54,310 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:07:54,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-02 14:07:54,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 339. [2021-05-02 14:07:54,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 218 states have (on average 1.0642201834862386) internal successors, (232), 226 states have internal predecessors, (232), 76 states have call successors, (76), 46 states have call predecessors, (76), 44 states have return successors, (71), 66 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 14:07:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 379 transitions. [2021-05-02 14:07:54,338 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 379 transitions. Word has length 178 [2021-05-02 14:07:54,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:54,339 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 379 transitions. [2021-05-02 14:07:54,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 11 states have call successors, (30), 11 states have call predecessors, (30), 9 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-02 14:07:54,339 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 379 transitions. [2021-05-02 14:07:54,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-05-02 14:07:54,341 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:54,341 INFO L523 BasicCegarLoop]: trace histogram [28, 27, 27, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:07:54,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 14:07:54,561 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:54,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:54,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2030603998, now seen corresponding path program 3 times [2021-05-02 14:07:54,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:54,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457349014] [2021-05-02 14:07:54,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:54,571 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:54,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070876944] [2021-05-02 14:07:54,571 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:54,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:07:54,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:54,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 14:07:54,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:54,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:54,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:54,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:54,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:54,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:54,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 243 proven. 94 refuted. 0 times theorem prover too weak. 1237 trivial. 0 not checked. [2021-05-02 14:07:54,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:54,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457349014] [2021-05-02 14:07:54,938 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:54,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070876944] [2021-05-02 14:07:54,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070876944] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:54,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:54,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:07:54,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044564908] [2021-05-02 14:07:54,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:07:54,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:54,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:07:54,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:07:54,941 INFO L87 Difference]: Start difference. First operand 339 states and 379 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-02 14:08:03,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:08:03,232 INFO L93 Difference]: Finished difference Result 348 states and 387 transitions. [2021-05-02 14:08:03,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:08:03,233 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) Word has length 183 [2021-05-02 14:08:03,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:08:03,235 INFO L225 Difference]: With dead ends: 348 [2021-05-02 14:08:03,235 INFO L226 Difference]: Without dead ends: 331 [2021-05-02 14:08:03,235 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:08:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-05-02 14:08:03,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 324. [2021-05-02 14:08:03,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 209 states have (on average 1.0478468899521531) internal successors, (219), 214 states have internal predecessors, (219), 71 states have call successors, (71), 45 states have call predecessors, (71), 43 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 14:08:03,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 359 transitions. [2021-05-02 14:08:03,260 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 359 transitions. Word has length 183 [2021-05-02 14:08:03,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:08:03,260 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 359 transitions. [2021-05-02 14:08:03,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-02 14:08:03,260 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 359 transitions. [2021-05-02 14:08:03,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-05-02 14:08:03,262 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:08:03,262 INFO L523 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:08:03,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 14:08:03,485 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:08:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:08:03,485 INFO L82 PathProgramCache]: Analyzing trace with hash -108799506, now seen corresponding path program 7 times [2021-05-02 14:08:03,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:08:03,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445624379] [2021-05-02 14:08:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:08:03,491 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:08:03,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950279087] [2021-05-02 14:08:03,492 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:08:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:08:03,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:08:03,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:08:03,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 59 proven. 1391 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-05-02 14:08:03,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:08:03,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445624379] [2021-05-02 14:08:03,908 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:08:03,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950279087] [2021-05-02 14:08:03,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950279087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:08:03,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:08:03,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:08:03,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187101309] [2021-05-02 14:08:03,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:08:03,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:08:03,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:08:03,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:08:03,910 INFO L87 Difference]: Start difference. First operand 324 states and 359 transitions. Second operand has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 11 states have call successors, (31), 11 states have call predecessors, (31), 9 states have return successors, (29), 9 states have call predecessors, (29), 10 states have call successors, (29) [2021-05-02 14:08:04,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:08:04,212 INFO L93 Difference]: Finished difference Result 346 states and 382 transitions. [2021-05-02 14:08:04,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:08:04,212 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 11 states have call successors, (31), 11 states have call predecessors, (31), 9 states have return successors, (29), 9 states have call predecessors, (29), 10 states have call successors, (29) Word has length 186 [2021-05-02 14:08:04,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:08:04,214 INFO L225 Difference]: With dead ends: 346 [2021-05-02 14:08:04,214 INFO L226 Difference]: Without dead ends: 338 [2021-05-02 14:08:04,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:08:04,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-02 14:08:04,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 330. [2021-05-02 14:08:04,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 215 states have (on average 1.0465116279069768) internal successors, (225), 218 states have internal predecessors, (225), 71 states have call successors, (71), 45 states have call predecessors, (71), 43 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 14:08:04,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 365 transitions. [2021-05-02 14:08:04,238 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 365 transitions. Word has length 186 [2021-05-02 14:08:04,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:08:04,238 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 365 transitions. [2021-05-02 14:08:04,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 11 states have call successors, (31), 11 states have call predecessors, (31), 9 states have return successors, (29), 9 states have call predecessors, (29), 10 states have call successors, (29) [2021-05-02 14:08:04,239 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 365 transitions. [2021-05-02 14:08:04,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-05-02 14:08:04,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:08:04,241 INFO L523 BasicCegarLoop]: trace histogram [31, 30, 30, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:08:04,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 14:08:04,457 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:08:04,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:08:04,457 INFO L82 PathProgramCache]: Analyzing trace with hash -747682299, now seen corresponding path program 6 times [2021-05-02 14:08:04,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:08:04,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188121959] [2021-05-02 14:08:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:08:04,463 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:08:04,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126823091] [2021-05-02 14:08:04,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:08:04,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-02 14:08:04,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:08:04,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 14:08:04,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:08:04,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:04,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:04,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:04,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:04,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:04,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:04,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:04,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 287 proven. 191 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2021-05-02 14:08:04,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:08:04,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188121959] [2021-05-02 14:08:04,972 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:08:04,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126823091] [2021-05-02 14:08:04,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126823091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:08:04,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:08:04,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:08:04,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875131504] [2021-05-02 14:08:04,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:08:04,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:08:04,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:08:04,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:08:04,973 INFO L87 Difference]: Start difference. First operand 330 states and 365 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-02 14:08:13,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:08:13,359 INFO L93 Difference]: Finished difference Result 355 states and 385 transitions. [2021-05-02 14:08:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:08:13,359 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) Word has length 202 [2021-05-02 14:08:13,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:08:13,361 INFO L225 Difference]: With dead ends: 355 [2021-05-02 14:08:13,361 INFO L226 Difference]: Without dead ends: 347 [2021-05-02 14:08:13,362 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:08:13,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-02 14:08:13,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 346. [2021-05-02 14:08:13,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 227 states have (on average 1.0352422907488987) internal successors, (235), 230 states have internal predecessors, (235), 71 states have call successors, (71), 49 states have call predecessors, (71), 47 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 14:08:13,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 375 transitions. [2021-05-02 14:08:13,386 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 375 transitions. Word has length 202 [2021-05-02 14:08:13,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:08:13,386 INFO L480 AbstractCegarLoop]: Abstraction has 346 states and 375 transitions. [2021-05-02 14:08:13,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-02 14:08:13,386 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 375 transitions. [2021-05-02 14:08:13,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 14:08:13,388 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:08:13,389 INFO L523 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:08:13,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 14:08:13,603 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:08:13,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:08:13,603 INFO L82 PathProgramCache]: Analyzing trace with hash -211170947, now seen corresponding path program 8 times [2021-05-02 14:08:13,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:08:13,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119717466] [2021-05-02 14:08:13,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:08:13,610 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:08:13,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211289131] [2021-05-02 14:08:13,611 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:08:13,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:08:13,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:08:13,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 14:08:13,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:08:13,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:13,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 214 proven. 146 refuted. 0 times theorem prover too weak. 1742 trivial. 0 not checked. [2021-05-02 14:08:14,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:08:14,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119717466] [2021-05-02 14:08:14,343 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:08:14,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211289131] [2021-05-02 14:08:14,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211289131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:08:14,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:08:14,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:08:14,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215790947] [2021-05-02 14:08:14,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:08:14,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:08:14,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:08:14,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:08:14,344 INFO L87 Difference]: Start difference. First operand 346 states and 375 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 10 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2021-05-02 14:08:14,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:08:14,992 INFO L93 Difference]: Finished difference Result 484 states and 555 transitions. [2021-05-02 14:08:14,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:08:14,993 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 10 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) Word has length 210 [2021-05-02 14:08:14,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:08:14,996 INFO L225 Difference]: With dead ends: 484 [2021-05-02 14:08:14,996 INFO L226 Difference]: Without dead ends: 424 [2021-05-02 14:08:14,997 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 297.1ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:08:14,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-05-02 14:08:15,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 390. [2021-05-02 14:08:15,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 250 states have (on average 1.056) internal successors, (264), 253 states have internal predecessors, (264), 92 states have call successors, (92), 49 states have call predecessors, (92), 47 states have return successors, (90), 87 states have call predecessors, (90), 90 states have call successors, (90) [2021-05-02 14:08:15,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 446 transitions. [2021-05-02 14:08:15,030 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 446 transitions. Word has length 210 [2021-05-02 14:08:15,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:08:15,030 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 446 transitions. [2021-05-02 14:08:15,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 10 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2021-05-02 14:08:15,031 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 446 transitions. [2021-05-02 14:08:15,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 14:08:15,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:08:15,033 INFO L523 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:08:15,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:08:15,249 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:08:15,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:08:15,249 INFO L82 PathProgramCache]: Analyzing trace with hash -614515587, now seen corresponding path program 9 times [2021-05-02 14:08:15,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:08:15,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029124280] [2021-05-02 14:08:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:08:15,255 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:08:15,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594301998] [2021-05-02 14:08:15,255 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:08:15,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 14:08:15,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:08:15,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 14:08:15,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:08:15,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:24,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:24,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:24,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:26,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 358 proven. 157 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2021-05-02 14:08:28,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:08:28,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029124280] [2021-05-02 14:08:28,825 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:08:28,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594301998] [2021-05-02 14:08:28,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594301998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:08:28,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:08:28,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:08:28,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511119184] [2021-05-02 14:08:28,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:08:28,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:08:28,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:08:28,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=121, Unknown=4, NotChecked=0, Total=156 [2021-05-02 14:08:28,826 INFO L87 Difference]: Start difference. First operand 390 states and 446 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 14:08:53,725 WARN L205 SmtUtils]: Spent 8.06 s on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-05-02 14:10:02,753 WARN L205 SmtUtils]: Spent 34.67 s on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-05-02 14:10:41,546 WARN L205 SmtUtils]: Spent 32.67 s on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-02 14:11:22,219 WARN L205 SmtUtils]: Spent 32.44 s on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-02 14:12:19,157 WARN L205 SmtUtils]: Spent 40.64 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-02 14:12:39,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:39,945 INFO L93 Difference]: Finished difference Result 524 states and 649 transitions. [2021-05-02 14:12:39,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:12:39,947 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 210 [2021-05-02 14:12:39,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:39,950 INFO L225 Difference]: With dead ends: 524 [2021-05-02 14:12:39,950 INFO L226 Difference]: Without dead ends: 516 [2021-05-02 14:12:39,951 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 194497.8ms TimeCoverageRelationStatistics Valid=117, Invalid=413, Unknown=22, NotChecked=0, Total=552 [2021-05-02 14:12:39,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-05-02 14:12:39,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 436. [2021-05-02 14:12:39,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 273 states have (on average 1.0622710622710623) internal successors, (290), 277 states have internal predecessors, (290), 113 states have call successors, (113), 51 states have call predecessors, (113), 49 states have return successors, (111), 107 states have call predecessors, (111), 111 states have call successors, (111) [2021-05-02 14:12:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 514 transitions. [2021-05-02 14:12:39,999 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 514 transitions. Word has length 210 [2021-05-02 14:12:39,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:39,999 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 514 transitions. [2021-05-02 14:12:39,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 14:12:39,999 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 514 transitions. [2021-05-02 14:12:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-05-02 14:12:40,001 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:40,001 INFO L523 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:12:40,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:12:40,217 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:40,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:40,217 INFO L82 PathProgramCache]: Analyzing trace with hash 418243538, now seen corresponding path program 10 times [2021-05-02 14:12:40,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:40,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730103905] [2021-05-02 14:12:40,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:40,228 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:12:40,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751887309] [2021-05-02 14:12:40,229 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:12:40,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:12:40,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:12:40,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 14:12:40,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:12:40,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:40,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:41,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:42,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:42,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:42,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:42,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:42,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:42,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2830 backedges. 83 proven. 332 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2021-05-02 14:12:42,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:42,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730103905] [2021-05-02 14:12:42,424 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:12:42,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751887309] [2021-05-02 14:12:42,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751887309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:12:42,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:12:42,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-02 14:12:42,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846252591] [2021-05-02 14:12:42,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 14:12:42,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:42,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 14:12:42,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-05-02 14:12:42,425 INFO L87 Difference]: Start difference. First operand 436 states and 514 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 23 states have internal predecessors, (62), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 14 states have call successors, (38) [2021-05-02 14:12:45,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:45,053 INFO L93 Difference]: Finished difference Result 560 states and 648 transitions. [2021-05-02 14:12:45,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 14:12:45,055 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 23 states have internal predecessors, (62), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 14 states have call successors, (38) Word has length 242 [2021-05-02 14:12:45,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:45,057 INFO L225 Difference]: With dead ends: 560 [2021-05-02 14:12:45,057 INFO L226 Difference]: Without dead ends: 394 [2021-05-02 14:12:45,058 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1328.0ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-05-02 14:12:45,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-02 14:12:45,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2021-05-02 14:12:45,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 247 states have (on average 1.0647773279352226) internal successors, (263), 250 states have internal predecessors, (263), 101 states have call successors, (101), 47 states have call predecessors, (101), 45 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-02 14:12:45,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 463 transitions. [2021-05-02 14:12:45,106 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 463 transitions. Word has length 242 [2021-05-02 14:12:45,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:45,107 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 463 transitions. [2021-05-02 14:12:45,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 23 states have internal predecessors, (62), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 14 states have call successors, (38) [2021-05-02 14:12:45,107 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 463 transitions. [2021-05-02 14:12:45,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-02 14:12:45,109 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:45,109 INFO L523 BasicCegarLoop]: trace histogram [41, 40, 40, 10, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:12:45,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 14:12:45,336 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:45,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:45,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1458326881, now seen corresponding path program 11 times [2021-05-02 14:12:45,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:45,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512936804] [2021-05-02 14:12:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:45,344 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:12:45,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869094471] [2021-05-02 14:12:45,345 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:12:45,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 14:12:45,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:12:45,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 14:12:45,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:12:45,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:45,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:46,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:46,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:46,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:46,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:46,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:46,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:46,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:46,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:46,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:46,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:46,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3500 backedges. 3280 proven. 8 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-05-02 14:12:46,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:46,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512936804] [2021-05-02 14:12:46,253 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:12:46,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869094471] [2021-05-02 14:12:46,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869094471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:12:46,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:12:46,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:12:46,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316792968] [2021-05-02 14:12:46,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:12:46,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:46,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:12:46,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:12:46,255 INFO L87 Difference]: Start difference. First operand 394 states and 463 transitions. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 14 states have internal predecessors, (95), 14 states have call successors, (44), 14 states have call predecessors, (44), 13 states have return successors, (42), 13 states have call predecessors, (42), 14 states have call successors, (42) [2021-05-02 14:12:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:47,047 INFO L93 Difference]: Finished difference Result 631 states and 742 transitions. [2021-05-02 14:12:47,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:12:47,062 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 14 states have internal predecessors, (95), 14 states have call successors, (44), 14 states have call predecessors, (44), 13 states have return successors, (42), 13 states have call predecessors, (42), 14 states have call successors, (42) Word has length 266 [2021-05-02 14:12:47,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:47,062 INFO L225 Difference]: With dead ends: 631 [2021-05-02 14:12:47,062 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 14:12:47,064 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 272.6ms TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:12:47,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 14:12:47,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 14:12:47,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 14:12:47,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 14:12:47,065 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 266 [2021-05-02 14:12:47,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:47,065 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 14:12:47,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 14 states have internal predecessors, (95), 14 states have call successors, (44), 14 states have call predecessors, (44), 13 states have return successors, (42), 13 states have call predecessors, (42), 14 states have call successors, (42) [2021-05-02 14:12:47,066 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 14:12:47,066 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 14:12:47,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 14:12:47,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 14:12:47,490 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 228 [2021-05-02 14:15:12,200 WARN L205 SmtUtils]: Spent 2.40 m on a formula simplification. DAG size of input: 233 DAG size of output: 146 [2021-05-02 14:17:37,684 WARN L205 SmtUtils]: Spent 2.42 m on a formula simplification. DAG size of input: 184 DAG size of output: 112 [2021-05-02 14:17:59,387 WARN L205 SmtUtils]: Spent 21.70 s on a formula simplification. DAG size of input: 138 DAG size of output: 37 [2021-05-02 14:19:14,906 WARN L205 SmtUtils]: Spent 1.26 m on a formula simplification. DAG size of input: 214 DAG size of output: 94