/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/egcd3-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:58:52,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:58:52,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:58:52,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:58:52,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:58:52,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:58:52,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:58:52,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:58:52,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:58:52,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:58:52,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:58:52,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:58:52,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:58:52,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:58:52,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:58:52,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:58:52,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:58:52,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:58:52,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:58:52,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:58:52,546 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 14:58:52,560 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:58:52,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:58:52,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:58:52,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:58:52,564 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:58:52,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:58:52,565 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:58:52,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:58:52,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:58:52,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:58:52,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:58:52,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:58:52,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:58:52,566 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:58:52,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:58:52,566 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:58:52,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:58:52,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:58:52,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:58:52,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:58:52,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:58:52,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:58:52,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:58:52,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:58:52,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:58:52,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:58:52,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:58:52,568 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:58:52,568 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:58:52,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:58:52,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:58:52,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:58:52,840 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:58:52,841 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:58:52,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2021-05-02 14:58:52,883 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/136d88aea/7e505f1dd647431e8a77aa7ed60bf785/FLAG9e45f578d [2021-05-02 14:58:53,199 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:58:53,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2021-05-02 14:58:53,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/136d88aea/7e505f1dd647431e8a77aa7ed60bf785/FLAG9e45f578d [2021-05-02 14:58:53,657 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/136d88aea/7e505f1dd647431e8a77aa7ed60bf785 [2021-05-02 14:58:53,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:58:53,660 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:58:53,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:58:53,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:58:53,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:58:53,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:58:53" (1/1) ... [2021-05-02 14:58:53,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73cf8707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:53, skipping insertion in model container [2021-05-02 14:58:53,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:58:53" (1/1) ... [2021-05-02 14:58:53,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:58:53,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:58:53,767 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/egcd3-ll_unwindbound10.c[490,503] [2021-05-02 14:58:53,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:58:53,785 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:58:53,792 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/egcd3-ll_unwindbound10.c[490,503] [2021-05-02 14:58:53,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:58:53,806 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:58:53,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:53 WrapperNode [2021-05-02 14:58:53,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:58:53,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:58:53,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:58:53,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:58:53,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:53" (1/1) ... [2021-05-02 14:58:53,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:53" (1/1) ... [2021-05-02 14:58:53,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:53" (1/1) ... [2021-05-02 14:58:53,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:53" (1/1) ... [2021-05-02 14:58:53,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:53" (1/1) ... [2021-05-02 14:58:53,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:53" (1/1) ... [2021-05-02 14:58:53,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:53" (1/1) ... [2021-05-02 14:58:53,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:58:53,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:58:53,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:58:53,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:58:53,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:53" (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 14:58:53,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:58:53,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:58:53,920 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:58:53,920 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:58:53,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:58:53,920 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:58:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:58:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:58:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:58:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:58:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:58:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:58:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:58:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:58:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:58:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:58:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:58:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:58:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:58:53,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:58:54,117 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:58:54,118 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 14:58:54,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:58:54 BoogieIcfgContainer [2021-05-02 14:58:54,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:58:54,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:58:54,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:58:54,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:58:54,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:58:53" (1/3) ... [2021-05-02 14:58:54,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60375e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:58:54, skipping insertion in model container [2021-05-02 14:58:54,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:53" (2/3) ... [2021-05-02 14:58:54,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60375e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:58:54, skipping insertion in model container [2021-05-02 14:58:54,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:58:54" (3/3) ... [2021-05-02 14:58:54,123 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound10.c [2021-05-02 14:58:54,126 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:58:54,128 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:58:54,138 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:58:54,151 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:58:54,151 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:58:54,151 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:58:54,152 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:58:54,152 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:58:54,152 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:58:54,152 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:58:54,152 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:58:54,172 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 14:58:54,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 14:58:54,175 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:54,175 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:58:54,175 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:54,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:54,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 1 times [2021-05-02 14:58:54,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:54,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683780464] [2021-05-02 14:58:54,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:54,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:58:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:54,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:58:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:54,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 14:58:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:58:54,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:54,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683780464] [2021-05-02 14:58:54,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683780464] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:58:54,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:58:54,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:58:54,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843646304] [2021-05-02 14:58:54,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:58:54,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:54,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:58:54,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:58:54,390 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:54,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:54,474 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2021-05-02 14:58:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:58:54,475 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 14:58:54,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:54,480 INFO L225 Difference]: With dead ends: 74 [2021-05-02 14:58:54,480 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 14:58:54,482 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:58:54,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 14:58:54,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 14:58:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:58:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-05-02 14:58:54,506 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2021-05-02 14:58:54,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:54,507 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-05-02 14:58:54,507 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:54,507 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-05-02 14:58:54,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 14:58:54,508 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:54,508 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:58:54,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:58:54,508 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:54,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:54,509 INFO L82 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 1 times [2021-05-02 14:58:54,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:54,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571948148] [2021-05-02 14:58:54,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:54,522 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:54,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70409052] [2021-05-02 14:58:54,522 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 14:58:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:54,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:58:54,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:54,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:54,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:54,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:54,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:54,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:54,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:58:54,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:54,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571948148] [2021-05-02 14:58:54,654 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:54,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70409052] [2021-05-02 14:58:54,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70409052] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:58:54,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:58:54,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 14:58:54,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745119906] [2021-05-02 14:58:54,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 14:58:54,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:54,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 14:58:54,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:58:54,656 INFO L87 Difference]: Start difference. First operand 35 states and 45 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:54,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:54,667 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-05-02 14:58:54,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 14:58:54,668 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 14:58:54,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:54,669 INFO L225 Difference]: With dead ends: 44 [2021-05-02 14:58:54,669 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 14:58:54,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:58:54,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 14:58:54,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 14:58:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:58:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-02 14:58:54,674 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2021-05-02 14:58:54,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:54,675 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-02 14:58:54,675 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-02 14:58:54,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 14:58:54,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:54,676 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:58:54,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:58:54,893 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:54,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:54,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 1 times [2021-05-02 14:58:54,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:54,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287885873] [2021-05-02 14:58:54,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:54,910 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:54,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320560765] [2021-05-02 14:58:54,911 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 14:58:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:54,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:58:54,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:55,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:58:55,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:55,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287885873] [2021-05-02 14:58:55,048 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:55,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320560765] [2021-05-02 14:58:55,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320560765] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:58:55,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:58:55,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 14:58:55,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049097417] [2021-05-02 14:58:55,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:58:55,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:55,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:58:55,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:58:55,050 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 14:58:55,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:55,129 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2021-05-02 14:58:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:58:55,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-02 14:58:55,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:55,133 INFO L225 Difference]: With dead ends: 57 [2021-05-02 14:58:55,134 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 14:58:55,134 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:58:55,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 14:58:55,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-05-02 14:58:55,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:58:55,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-05-02 14:58:55,150 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2021-05-02 14:58:55,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:55,151 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-05-02 14:58:55,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 14:58:55,151 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-05-02 14:58:55,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 14:58:55,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:55,152 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:58:55,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:55,371 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:55,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:55,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 1 times [2021-05-02 14:58:55,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:55,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502637724] [2021-05-02 14:58:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:55,381 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:55,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1450887272] [2021-05-02 14:58:55,381 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 14:58:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:55,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:58:55,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:55,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:58:55,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:55,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502637724] [2021-05-02 14:58:55,502 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:55,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450887272] [2021-05-02 14:58:55,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450887272] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:58:55,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:58:55,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:58:55,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013540793] [2021-05-02 14:58:55,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:58:55,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:55,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:58:55,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:58:55,503 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:55,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:55,522 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2021-05-02 14:58:55,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:58:55,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 14:58:55,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:55,523 INFO L225 Difference]: With dead ends: 62 [2021-05-02 14:58:55,523 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 14:58:55,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:58:55,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 14:58:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 14:58:55,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:58:55,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-02 14:58:55,527 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2021-05-02 14:58:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:55,528 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-02 14:58:55,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:55,528 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-02 14:58:55,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 14:58:55,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:55,529 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 14:58:55,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:55,751 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:55,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:55,752 INFO L82 PathProgramCache]: Analyzing trace with hash 795698770, now seen corresponding path program 1 times [2021-05-02 14:58:55,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:55,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702570747] [2021-05-02 14:58:55,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:55,766 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:55,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991999851] [2021-05-02 14:58:55,766 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 14:58:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:55,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:58:55,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:55,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:58:55,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:55,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702570747] [2021-05-02 14:58:55,893 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:55,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991999851] [2021-05-02 14:58:55,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991999851] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:58:55,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:58:55,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:58:55,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746989709] [2021-05-02 14:58:55,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:58:55,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:55,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:58:55,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:58:55,894 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 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 14:58:55,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:55,959 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2021-05-02 14:58:55,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:58:55,960 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 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 29 [2021-05-02 14:58:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:55,960 INFO L225 Difference]: With dead ends: 58 [2021-05-02 14:58:55,960 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 14:58:55,961 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:58:55,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 14:58:55,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 14:58:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:58:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2021-05-02 14:58:55,965 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2021-05-02 14:58:55,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:55,966 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2021-05-02 14:58:55,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 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 14:58:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2021-05-02 14:58:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 14:58:55,966 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:55,966 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:58:56,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:56,177 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:56,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:56,177 INFO L82 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 1 times [2021-05-02 14:58:56,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:56,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280387892] [2021-05-02 14:58:56,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:56,185 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:56,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294785461] [2021-05-02 14:58:56,185 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 14:58:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:56,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:58:56,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:56,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:56,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:56,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:56,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:56,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:56,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:56,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:56,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:56,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:56,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:56,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:58:56,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:56,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280387892] [2021-05-02 14:58:56,310 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:56,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294785461] [2021-05-02 14:58:56,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294785461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:56,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:56,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:58:56,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205042519] [2021-05-02 14:58:56,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:58:56,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:56,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:58:56,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:58:56,311 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:56,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:56,339 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2021-05-02 14:58:56,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:58:56,339 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-05-02 14:58:56,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:56,342 INFO L225 Difference]: With dead ends: 67 [2021-05-02 14:58:56,342 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 14:58:56,342 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:58:56,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 14:58:56,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 14:58:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:58:56,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2021-05-02 14:58:56,356 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2021-05-02 14:58:56,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:56,356 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-05-02 14:58:56,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2021-05-02 14:58:56,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 14:58:56,357 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:56,357 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 14:58:56,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:58:56,561 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:56,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:56,561 INFO L82 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 1 times [2021-05-02 14:58:56,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:56,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627351928] [2021-05-02 14:58:56,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:56,569 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:56,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648980570] [2021-05-02 14:58:56,569 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 14:58:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:56,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:58:56,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:56,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:56,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:56,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:56,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:56,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:58:56,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:56,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627351928] [2021-05-02 14:58:56,679 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:56,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648980570] [2021-05-02 14:58:56,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648980570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:56,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:56,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:58:56,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923586528] [2021-05-02 14:58:56,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:58:56,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:56,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:58:56,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:58:56,680 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:56,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:56,847 INFO L93 Difference]: Finished difference Result 138 states and 201 transitions. [2021-05-02 14:58:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:58:56,847 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-05-02 14:58:56,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:56,848 INFO L225 Difference]: With dead ends: 138 [2021-05-02 14:58:56,848 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 14:58:56,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:58:56,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 14:58:56,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2021-05-02 14:58:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:58:56,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2021-05-02 14:58:56,856 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2021-05-02 14:58:56,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:56,857 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2021-05-02 14:58:56,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:56,857 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2021-05-02 14:58:56,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 14:58:56,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:56,857 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:58:57,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:57,065 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:57,065 INFO L82 PathProgramCache]: Analyzing trace with hash 495607521, now seen corresponding path program 1 times [2021-05-02 14:58:57,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:57,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288968943] [2021-05-02 14:58:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:57,073 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:57,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935999566] [2021-05-02 14:58:57,073 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 14:58:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:57,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:58:57,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:57,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:58:57,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:57,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288968943] [2021-05-02 14:58:57,200 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:57,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935999566] [2021-05-02 14:58:57,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935999566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:57,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:57,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:58:57,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329624195] [2021-05-02 14:58:57,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:58:57,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:57,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:58:57,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:58:57,201 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:58:57,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:57,283 INFO L93 Difference]: Finished difference Result 95 states and 128 transitions. [2021-05-02 14:58:57,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:58:57,283 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 14:58:57,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:57,284 INFO L225 Difference]: With dead ends: 95 [2021-05-02 14:58:57,284 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 14:58:57,285 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:58:57,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 14:58:57,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-02 14:58:57,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 70 states have internal predecessors, (93), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:58:57,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2021-05-02 14:58:57,292 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 34 [2021-05-02 14:58:57,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:57,292 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2021-05-02 14:58:57,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:58:57,292 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2021-05-02 14:58:57,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 14:58:57,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:57,293 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 14:58:57,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:57,517 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:57,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:57,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 1 times [2021-05-02 14:58:57,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:57,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789596748] [2021-05-02 14:58:57,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:57,527 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:57,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814408950] [2021-05-02 14:58:57,527 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 14:58:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:57,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:58:57,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:57,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,657 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 14:58:57,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:57,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789596748] [2021-05-02 14:58:57,658 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:57,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814408950] [2021-05-02 14:58:57,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814408950] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:58:57,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:58:57,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 14:58:57,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123369086] [2021-05-02 14:58:57,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:58:57,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:57,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:58:57,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:58:57,659 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:57,681 INFO L93 Difference]: Finished difference Result 135 states and 184 transitions. [2021-05-02 14:58:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:58:57,681 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-05-02 14:58:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:57,682 INFO L225 Difference]: With dead ends: 135 [2021-05-02 14:58:57,682 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 14:58:57,683 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:58:57,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 14:58:57,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-02 14:58:57,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 72 states have internal predecessors, (95), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:58:57,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2021-05-02 14:58:57,688 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 35 [2021-05-02 14:58:57,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:57,688 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2021-05-02 14:58:57,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:57,688 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2021-05-02 14:58:57,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 14:58:57,689 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:57,689 INFO L523 BasicCegarLoop]: trace histogram [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, 1] [2021-05-02 14:58:57,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:58:57,901 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:57,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:57,902 INFO L82 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 1 times [2021-05-02 14:58:57,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:57,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879643115] [2021-05-02 14:58:57,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:57,909 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:57,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920599359] [2021-05-02 14:58:57,909 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 14:58:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:57,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:58:57,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:57,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:57,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:58:58,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:58,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879643115] [2021-05-02 14:58:58,033 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:58,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920599359] [2021-05-02 14:58:58,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920599359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:58,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:58,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:58:58,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589866851] [2021-05-02 14:58:58,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:58:58,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:58,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:58:58,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:58:58,034 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:58,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:58,073 INFO L93 Difference]: Finished difference Result 171 states and 233 transitions. [2021-05-02 14:58:58,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:58:58,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 14:58:58,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:58,075 INFO L225 Difference]: With dead ends: 171 [2021-05-02 14:58:58,075 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 14:58:58,076 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:58:58,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 14:58:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2021-05-02 14:58:58,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 14:58:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2021-05-02 14:58:58,083 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 36 [2021-05-02 14:58:58,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:58,083 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2021-05-02 14:58:58,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:58,083 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2021-05-02 14:58:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 14:58:58,084 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:58,084 INFO L523 BasicCegarLoop]: trace histogram [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 14:58:58,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:58,293 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:58,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:58,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 1 times [2021-05-02 14:58:58,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:58,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308767741] [2021-05-02 14:58:58,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:58,300 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:58,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645770991] [2021-05-02 14:58:58,300 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 14:58:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:58,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 14:58:58,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:58,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:58:58,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:58,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308767741] [2021-05-02 14:58:58,452 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:58,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645770991] [2021-05-02 14:58:58,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645770991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:58,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:58,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:58:58,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210645594] [2021-05-02 14:58:58,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:58:58,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:58,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:58:58,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:58:58,453 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:58,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:58,573 INFO L93 Difference]: Finished difference Result 154 states and 208 transitions. [2021-05-02 14:58:58,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:58:58,573 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 14:58:58,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:58,574 INFO L225 Difference]: With dead ends: 154 [2021-05-02 14:58:58,574 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 14:58:58,575 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:58:58,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 14:58:58,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2021-05-02 14:58:58,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 14:58:58,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2021-05-02 14:58:58,583 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2021-05-02 14:58:58,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:58,583 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2021-05-02 14:58:58,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:58,583 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2021-05-02 14:58:58,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 14:58:58,584 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:58,584 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 14:58:58,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:58,797 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:58,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:58,797 INFO L82 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 2 times [2021-05-02 14:58:58,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:58,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701213064] [2021-05-02 14:58:58,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:58,804 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:58,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820398948] [2021-05-02 14:58:58,804 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 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 14:58:58,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:58:58,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:58:58,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 14:58:58,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:58,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:58:58,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:58,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701213064] [2021-05-02 14:58:58,928 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:58,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820398948] [2021-05-02 14:58:58,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820398948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:58,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:58,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:58:58,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914495803] [2021-05-02 14:58:58,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:58:58,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:58,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:58:58,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:58:58,930 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:58,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:58,990 INFO L93 Difference]: Finished difference Result 189 states and 247 transitions. [2021-05-02 14:58:58,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:58:58,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-05-02 14:58:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:58,992 INFO L225 Difference]: With dead ends: 189 [2021-05-02 14:58:58,992 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 14:58:58,992 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:58:58,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 14:58:59,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2021-05-02 14:58:59,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.31496062992126) internal successors, (167), 129 states have internal predecessors, (167), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 14:58:59,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 231 transitions. [2021-05-02 14:58:59,001 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 231 transitions. Word has length 37 [2021-05-02 14:58:59,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:59,001 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 231 transitions. [2021-05-02 14:58:59,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:59,001 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 231 transitions. [2021-05-02 14:58:59,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 14:58:59,002 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:59,002 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-05-02 14:58:59,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:58:59,218 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:59,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:59,218 INFO L82 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 1 times [2021-05-02 14:58:59,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:59,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435875780] [2021-05-02 14:58:59,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:59,224 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:59,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705397543] [2021-05-02 14:58:59,224 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 14:58:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:59,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:58:59,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:59,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 14:58:59,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:59,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435875780] [2021-05-02 14:58:59,338 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:59,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705397543] [2021-05-02 14:58:59,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705397543] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:58:59,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:58:59,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:58:59,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756130997] [2021-05-02 14:58:59,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:58:59,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:59,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:58:59,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:58:59,340 INFO L87 Difference]: Start difference. First operand 173 states and 231 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:58:59,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:59,460 INFO L93 Difference]: Finished difference Result 195 states and 258 transitions. [2021-05-02 14:58:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:58:59,460 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 14:58:59,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:59,462 INFO L225 Difference]: With dead ends: 195 [2021-05-02 14:58:59,462 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 14:58:59,462 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:58:59,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 14:58:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-02 14:58:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 139 states have (on average 1.3021582733812949) internal successors, (181), 141 states have internal predecessors, (181), 37 states have call successors, (37), 16 states have call predecessors, (37), 15 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 14:58:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 253 transitions. [2021-05-02 14:58:59,471 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 253 transitions. Word has length 39 [2021-05-02 14:58:59,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:59,472 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 253 transitions. [2021-05-02 14:58:59,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:58:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 253 transitions. [2021-05-02 14:58:59,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 14:58:59,472 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:59,472 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 14:58:59,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:58:59,687 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:59,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:59,688 INFO L82 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 1 times [2021-05-02 14:58:59,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:59,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484118206] [2021-05-02 14:58:59,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:59,695 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:59,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943592175] [2021-05-02 14:58:59,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:59,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 14:58:59,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:59,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:58:59,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:59,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484118206] [2021-05-02 14:58:59,843 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:59,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943592175] [2021-05-02 14:58:59,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943592175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:58:59,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:58:59,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:58:59,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003169406] [2021-05-02 14:58:59,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:58:59,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:59,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:58:59,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:58:59,844 INFO L87 Difference]: Start difference. First operand 192 states and 253 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:58:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:59,971 INFO L93 Difference]: Finished difference Result 200 states and 260 transitions. [2021-05-02 14:58:59,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:58:59,972 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2021-05-02 14:58:59,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:59,973 INFO L225 Difference]: With dead ends: 200 [2021-05-02 14:58:59,973 INFO L226 Difference]: Without dead ends: 198 [2021-05-02 14:58:59,975 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:58:59,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-02 14:58:59,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2021-05-02 14:58:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 142 states have (on average 1.295774647887324) internal successors, (184), 144 states have internal predecessors, (184), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 14:58:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 256 transitions. [2021-05-02 14:58:59,988 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 256 transitions. Word has length 41 [2021-05-02 14:58:59,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:59,988 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 256 transitions. [2021-05-02 14:58:59,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:58:59,988 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 256 transitions. [2021-05-02 14:58:59,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 14:58:59,989 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:59,989 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1] [2021-05-02 14:59:00,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:59:00,212 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:00,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:00,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 1 times [2021-05-02 14:59:00,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:00,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568763290] [2021-05-02 14:59:00,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:00,219 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:00,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524231543] [2021-05-02 14:59:00,219 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 14:59:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:00,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:59:00,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:00,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 14:59:00,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:00,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568763290] [2021-05-02 14:59:00,334 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:00,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524231543] [2021-05-02 14:59:00,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524231543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:00,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:00,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:59:00,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48856603] [2021-05-02 14:59:00,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:59:00,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:00,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:59:00,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:59:00,336 INFO L87 Difference]: Start difference. First operand 196 states and 256 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 14:59:00,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:00,393 INFO L93 Difference]: Finished difference Result 260 states and 359 transitions. [2021-05-02 14:59:00,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:59:00,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2021-05-02 14:59:00,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:00,395 INFO L225 Difference]: With dead ends: 260 [2021-05-02 14:59:00,395 INFO L226 Difference]: Without dead ends: 258 [2021-05-02 14:59:00,397 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:59:00,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-02 14:59:00,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 230. [2021-05-02 14:59:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 155 states have (on average 1.2967741935483872) internal successors, (201), 162 states have internal predecessors, (201), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 49 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 14:59:00,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 313 transitions. [2021-05-02 14:59:00,417 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 313 transitions. Word has length 44 [2021-05-02 14:59:00,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:00,418 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 313 transitions. [2021-05-02 14:59:00,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 14:59:00,418 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 313 transitions. [2021-05-02 14:59:00,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 14:59:00,419 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:00,419 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-02 14:59:00,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:00,629 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:00,629 INFO L82 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 1 times [2021-05-02 14:59:00,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:00,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222729011] [2021-05-02 14:59:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:00,635 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:00,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606007378] [2021-05-02 14:59:00,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:59:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:00,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 14:59:00,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:00,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:59:00,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:00,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222729011] [2021-05-02 14:59:00,773 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:00,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606007378] [2021-05-02 14:59:00,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606007378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:00,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:00,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:59:00,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229576154] [2021-05-02 14:59:00,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:59:00,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:00,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:59:00,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:59:00,775 INFO L87 Difference]: Start difference. First operand 230 states and 313 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:00,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:00,834 INFO L93 Difference]: Finished difference Result 379 states and 536 transitions. [2021-05-02 14:59:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:59:00,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-05-02 14:59:00,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:00,835 INFO L225 Difference]: With dead ends: 379 [2021-05-02 14:59:00,835 INFO L226 Difference]: Without dead ends: 241 [2021-05-02 14:59:00,836 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:59:00,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-02 14:59:00,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2021-05-02 14:59:00,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 162 states have (on average 1.2839506172839505) internal successors, (208), 168 states have internal predecessors, (208), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 14:59:00,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 320 transitions. [2021-05-02 14:59:00,847 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 320 transitions. Word has length 42 [2021-05-02 14:59:00,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:00,847 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 320 transitions. [2021-05-02 14:59:00,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:00,847 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 320 transitions. [2021-05-02 14:59:00,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:59:00,848 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:00,848 INFO L523 BasicCegarLoop]: trace histogram [4, 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] [2021-05-02 14:59:01,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 14:59:01,061 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:01,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:01,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1912500411, now seen corresponding path program 2 times [2021-05-02 14:59:01,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:01,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914808127] [2021-05-02 14:59:01,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:01,066 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:01,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548640451] [2021-05-02 14:59:01,066 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 14:59:01,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:59:01,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:01,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:59:01,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:01,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:01,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:01,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:01,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 14:59:01,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:01,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914808127] [2021-05-02 14:59:01,159 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:01,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548640451] [2021-05-02 14:59:01,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548640451] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:59:01,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:59:01,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:59:01,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632818564] [2021-05-02 14:59:01,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:59:01,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:01,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:59:01,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:59:01,160 INFO L87 Difference]: Start difference. First operand 237 states and 320 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 14:59:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:01,217 INFO L93 Difference]: Finished difference Result 445 states and 659 transitions. [2021-05-02 14:59:01,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:59:01,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-05-02 14:59:01,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:01,219 INFO L225 Difference]: With dead ends: 445 [2021-05-02 14:59:01,219 INFO L226 Difference]: Without dead ends: 375 [2021-05-02 14:59:01,220 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:59:01,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-02 14:59:01,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 261. [2021-05-02 14:59:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 186 states have (on average 1.3010752688172043) internal successors, (242), 192 states have internal predecessors, (242), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 14:59:01,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 354 transitions. [2021-05-02 14:59:01,234 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 354 transitions. Word has length 43 [2021-05-02 14:59:01,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:01,234 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 354 transitions. [2021-05-02 14:59:01,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 14:59:01,235 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 354 transitions. [2021-05-02 14:59:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 14:59:01,235 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:01,235 INFO L523 BasicCegarLoop]: trace histogram [3, 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] [2021-05-02 14:59:01,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 14:59:01,449 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:01,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:01,449 INFO L82 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 1 times [2021-05-02 14:59:01,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:01,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997547640] [2021-05-02 14:59:01,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:01,454 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:01,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081817644] [2021-05-02 14:59:01,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:59:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:01,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 14:59:01,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:01,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:01,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:01,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:01,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:01,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:01,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:01,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:01,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:01,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:01,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:01,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 14:59:01,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:01,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997547640] [2021-05-02 14:59:01,598 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:01,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081817644] [2021-05-02 14:59:01,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081817644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:01,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:01,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:59:01,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598970360] [2021-05-02 14:59:01,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:59:01,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:01,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:59:01,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:59:01,599 INFO L87 Difference]: Start difference. First operand 261 states and 354 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:59:01,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:01,826 INFO L93 Difference]: Finished difference Result 337 states and 476 transitions. [2021-05-02 14:59:01,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:59:01,826 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2021-05-02 14:59:01,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:01,828 INFO L225 Difference]: With dead ends: 337 [2021-05-02 14:59:01,828 INFO L226 Difference]: Without dead ends: 335 [2021-05-02 14:59:01,829 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:59:01,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-05-02 14:59:01,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 292. [2021-05-02 14:59:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 200 states have (on average 1.315) internal successors, (263), 208 states have internal predecessors, (263), 73 states have call successors, (73), 19 states have call predecessors, (73), 18 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 14:59:01,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 407 transitions. [2021-05-02 14:59:01,845 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 407 transitions. Word has length 46 [2021-05-02 14:59:01,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:01,845 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 407 transitions. [2021-05-02 14:59:01,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:59:01,845 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 407 transitions. [2021-05-02 14:59:01,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 14:59:01,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:01,846 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1] [2021-05-02 14:59:02,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 14:59:02,057 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:02,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:02,057 INFO L82 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 1 times [2021-05-02 14:59:02,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:02,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903306837] [2021-05-02 14:59:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:02,063 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:02,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458566398] [2021-05-02 14:59:02,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:59:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:02,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-02 14:59:02,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:02,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:02,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:02,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:02,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:02,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:02,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:02,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:02,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:02,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:02,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:02,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:02,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:59:02,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:02,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903306837] [2021-05-02 14:59:02,398 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:02,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458566398] [2021-05-02 14:59:02,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458566398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:02,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:02,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 14:59:02,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744570301] [2021-05-02 14:59:02,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 14:59:02,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:02,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 14:59:02,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:59:02,400 INFO L87 Difference]: Start difference. First operand 292 states and 407 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 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 14:59:02,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:02,813 INFO L93 Difference]: Finished difference Result 421 states and 594 transitions. [2021-05-02 14:59:02,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:59:02,814 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 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 58 [2021-05-02 14:59:02,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:02,815 INFO L225 Difference]: With dead ends: 421 [2021-05-02 14:59:02,815 INFO L226 Difference]: Without dead ends: 322 [2021-05-02 14:59:02,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 303.0ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-02 14:59:02,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-02 14:59:02,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 319. [2021-05-02 14:59:02,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 217 states have (on average 1.3133640552995391) internal successors, (285), 226 states have internal predecessors, (285), 81 states have call successors, (81), 21 states have call predecessors, (81), 20 states have return successors, (79), 71 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-02 14:59:02,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 445 transitions. [2021-05-02 14:59:02,831 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 445 transitions. Word has length 58 [2021-05-02 14:59:02,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:02,831 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 445 transitions. [2021-05-02 14:59:02,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 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 14:59:02,831 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 445 transitions. [2021-05-02 14:59:02,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 14:59:02,831 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:02,832 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:03,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:03,047 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:03,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:03,048 INFO L82 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 1 times [2021-05-02 14:59:03,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:03,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363716137] [2021-05-02 14:59:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:03,056 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:03,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726172312] [2021-05-02 14:59:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:03,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:59:03,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:03,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:59:03,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:03,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363716137] [2021-05-02 14:59:03,207 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:03,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726172312] [2021-05-02 14:59:03,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726172312] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:03,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:03,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:59:03,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091886651] [2021-05-02 14:59:03,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:59:03,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:03,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:59:03,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:59:03,208 INFO L87 Difference]: Start difference. First operand 319 states and 445 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:03,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:03,302 INFO L93 Difference]: Finished difference Result 508 states and 703 transitions. [2021-05-02 14:59:03,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:59:03,303 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2021-05-02 14:59:03,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:03,304 INFO L225 Difference]: With dead ends: 508 [2021-05-02 14:59:03,305 INFO L226 Difference]: Without dead ends: 376 [2021-05-02 14:59:03,306 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:59:03,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-02 14:59:03,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 363. [2021-05-02 14:59:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 249 states have (on average 1.2811244979919678) internal successors, (319), 257 states have internal predecessors, (319), 85 states have call successors, (85), 29 states have call predecessors, (85), 28 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-02 14:59:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 487 transitions. [2021-05-02 14:59:03,324 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 487 transitions. Word has length 63 [2021-05-02 14:59:03,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:03,324 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 487 transitions. [2021-05-02 14:59:03,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:03,325 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 487 transitions. [2021-05-02 14:59:03,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 14:59:03,327 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:03,327 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:03,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:03,533 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:03,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1288112160, now seen corresponding path program 1 times [2021-05-02 14:59:03,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:03,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297286769] [2021-05-02 14:59:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:03,538 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:03,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367537252] [2021-05-02 14:59:03,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:59:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:03,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:59:03,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:03,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:59:03,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:03,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297286769] [2021-05-02 14:59:03,691 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:03,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367537252] [2021-05-02 14:59:03,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367537252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:03,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:03,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:59:03,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778946455] [2021-05-02 14:59:03,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:59:03,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:03,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:59:03,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:59:03,692 INFO L87 Difference]: Start difference. First operand 363 states and 487 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:03,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:03,813 INFO L93 Difference]: Finished difference Result 457 states and 595 transitions. [2021-05-02 14:59:03,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:59:03,813 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), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2021-05-02 14:59:03,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:03,815 INFO L225 Difference]: With dead ends: 457 [2021-05-02 14:59:03,815 INFO L226 Difference]: Without dead ends: 450 [2021-05-02 14:59:03,815 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:59:03,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-02 14:59:03,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 430. [2021-05-02 14:59:03,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 295 states have (on average 1.264406779661017) internal successors, (373), 307 states have internal predecessors, (373), 98 states have call successors, (98), 37 states have call predecessors, (98), 36 states have return successors, (95), 85 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-02 14:59:03,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 566 transitions. [2021-05-02 14:59:03,834 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 566 transitions. Word has length 64 [2021-05-02 14:59:03,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:03,834 INFO L480 AbstractCegarLoop]: Abstraction has 430 states and 566 transitions. [2021-05-02 14:59:03,834 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), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:03,834 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 566 transitions. [2021-05-02 14:59:03,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 14:59:03,835 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:03,835 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2021-05-02 14:59:04,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 14:59:04,049 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:04,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:04,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1156119236, now seen corresponding path program 1 times [2021-05-02 14:59:04,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:04,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038867352] [2021-05-02 14:59:04,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:04,054 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:04,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635996322] [2021-05-02 14:59:04,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:04,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:59:04,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:04,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-02 14:59:04,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:04,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038867352] [2021-05-02 14:59:04,206 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:04,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635996322] [2021-05-02 14:59:04,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635996322] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:04,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:04,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:59:04,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293590582] [2021-05-02 14:59:04,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:59:04,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:04,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:59:04,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:59:04,207 INFO L87 Difference]: Start difference. First operand 430 states and 566 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 14:59:04,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:04,384 INFO L93 Difference]: Finished difference Result 460 states and 605 transitions. [2021-05-02 14:59:04,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:59:04,384 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 67 [2021-05-02 14:59:04,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:04,386 INFO L225 Difference]: With dead ends: 460 [2021-05-02 14:59:04,386 INFO L226 Difference]: Without dead ends: 458 [2021-05-02 14:59:04,387 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:59:04,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-05-02 14:59:04,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 440. [2021-05-02 14:59:04,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 301 states have (on average 1.2624584717607974) internal successors, (380), 313 states have internal predecessors, (380), 101 states have call successors, (101), 38 states have call predecessors, (101), 37 states have return successors, (98), 88 states have call predecessors, (98), 98 states have call successors, (98) [2021-05-02 14:59:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 579 transitions. [2021-05-02 14:59:04,407 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 579 transitions. Word has length 67 [2021-05-02 14:59:04,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:04,407 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 579 transitions. [2021-05-02 14:59:04,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 14:59:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 579 transitions. [2021-05-02 14:59:04,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 14:59:04,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:04,408 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 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 14:59:04,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 14:59:04,623 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:04,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:04,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1261753774, now seen corresponding path program 2 times [2021-05-02 14:59:04,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:04,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146602986] [2021-05-02 14:59:04,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:04,628 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:04,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469557760] [2021-05-02 14:59:04,628 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 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 14:59:04,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:59:04,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:04,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 14:59:04,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:04,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:59:04,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:04,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146602986] [2021-05-02 14:59:04,764 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:04,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469557760] [2021-05-02 14:59:04,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469557760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:04,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:04,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:59:04,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377055935] [2021-05-02 14:59:04,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:59:04,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:04,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:59:04,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:59:04,765 INFO L87 Difference]: Start difference. First operand 440 states and 579 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:59:05,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:05,061 INFO L93 Difference]: Finished difference Result 783 states and 1150 transitions. [2021-05-02 14:59:05,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:59:05,061 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-05-02 14:59:05,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:05,064 INFO L225 Difference]: With dead ends: 783 [2021-05-02 14:59:05,064 INFO L226 Difference]: Without dead ends: 776 [2021-05-02 14:59:05,064 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:59:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-05-02 14:59:05,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 502. [2021-05-02 14:59:05,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 347 states have (on average 1.2881844380403458) internal successors, (447), 359 states have internal predecessors, (447), 117 states have call successors, (117), 38 states have call predecessors, (117), 37 states have return successors, (114), 104 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-02 14:59:05,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 678 transitions. [2021-05-02 14:59:05,092 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 678 transitions. Word has length 65 [2021-05-02 14:59:05,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:05,093 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 678 transitions. [2021-05-02 14:59:05,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:59:05,093 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 678 transitions. [2021-05-02 14:59:05,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 14:59:05,094 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:05,094 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:05,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:05,309 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:05,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:05,309 INFO L82 PathProgramCache]: Analyzing trace with hash 365174246, now seen corresponding path program 1 times [2021-05-02 14:59:05,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:05,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521015245] [2021-05-02 14:59:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:05,315 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:05,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482596255] [2021-05-02 14:59:05,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:05,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:59:05,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:05,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:59:05,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:05,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521015245] [2021-05-02 14:59:05,454 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:05,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482596255] [2021-05-02 14:59:05,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482596255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:05,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:05,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:59:05,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563525761] [2021-05-02 14:59:05,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:59:05,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:05,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:59:05,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:59:05,455 INFO L87 Difference]: Start difference. First operand 502 states and 678 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:05,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:05,570 INFO L93 Difference]: Finished difference Result 755 states and 1057 transitions. [2021-05-02 14:59:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:59:05,570 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-05-02 14:59:05,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:05,572 INFO L225 Difference]: With dead ends: 755 [2021-05-02 14:59:05,572 INFO L226 Difference]: Without dead ends: 504 [2021-05-02 14:59:05,573 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:59:05,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-05-02 14:59:05,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 502. [2021-05-02 14:59:05,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 347 states have (on average 1.2795389048991355) internal successors, (444), 359 states have internal predecessors, (444), 117 states have call successors, (117), 38 states have call predecessors, (117), 37 states have return successors, (114), 104 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-02 14:59:05,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 675 transitions. [2021-05-02 14:59:05,596 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 675 transitions. Word has length 65 [2021-05-02 14:59:05,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:05,597 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 675 transitions. [2021-05-02 14:59:05,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:05,597 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 675 transitions. [2021-05-02 14:59:05,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 14:59:05,597 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:05,597 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:05,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 14:59:05,813 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:05,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:05,813 INFO L82 PathProgramCache]: Analyzing trace with hash -544828664, now seen corresponding path program 1 times [2021-05-02 14:59:05,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:05,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475123981] [2021-05-02 14:59:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:05,817 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:05,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367671917] [2021-05-02 14:59:05,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:59:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:05,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 14:59:05,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:05,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 14:59:05,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:05,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475123981] [2021-05-02 14:59:05,932 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:05,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367671917] [2021-05-02 14:59:05,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367671917] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:59:05,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:59:05,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:59:05,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509566605] [2021-05-02 14:59:05,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:59:05,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:05,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:59:05,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:59:05,933 INFO L87 Difference]: Start difference. First operand 502 states and 675 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:59:05,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:05,989 INFO L93 Difference]: Finished difference Result 860 states and 1209 transitions. [2021-05-02 14:59:05,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:59:05,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2021-05-02 14:59:05,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:05,996 INFO L225 Difference]: With dead ends: 860 [2021-05-02 14:59:05,996 INFO L226 Difference]: Without dead ends: 584 [2021-05-02 14:59:05,997 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:59:05,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-05-02 14:59:06,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 528. [2021-05-02 14:59:06,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 373 states have (on average 1.2868632707774799) internal successors, (480), 379 states have internal predecessors, (480), 117 states have call successors, (117), 38 states have call predecessors, (117), 37 states have return successors, (114), 110 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-02 14:59:06,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 711 transitions. [2021-05-02 14:59:06,021 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 711 transitions. Word has length 69 [2021-05-02 14:59:06,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:06,021 INFO L480 AbstractCegarLoop]: Abstraction has 528 states and 711 transitions. [2021-05-02 14:59:06,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:59:06,021 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 711 transitions. [2021-05-02 14:59:06,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 14:59:06,021 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:06,021 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:06,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:06,236 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:06,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:06,237 INFO L82 PathProgramCache]: Analyzing trace with hash -996119216, now seen corresponding path program 2 times [2021-05-02 14:59:06,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:06,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027702735] [2021-05-02 14:59:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:06,242 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:06,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287217971] [2021-05-02 14:59:06,242 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 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 14:59:06,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:59:06,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:06,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:59:06,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:06,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:59:06,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:06,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027702735] [2021-05-02 14:59:06,427 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:06,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287217971] [2021-05-02 14:59:06,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287217971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:06,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:06,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:59:06,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303702852] [2021-05-02 14:59:06,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:59:06,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:06,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:59:06,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:59:06,429 INFO L87 Difference]: Start difference. First operand 528 states and 711 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:06,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:06,550 INFO L93 Difference]: Finished difference Result 857 states and 1194 transitions. [2021-05-02 14:59:06,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:59:06,550 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2021-05-02 14:59:06,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:06,552 INFO L225 Difference]: With dead ends: 857 [2021-05-02 14:59:06,552 INFO L226 Difference]: Without dead ends: 551 [2021-05-02 14:59:06,553 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:59:06,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-05-02 14:59:06,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 540. [2021-05-02 14:59:06,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 383 states have (on average 1.279373368146214) internal successors, (490), 386 states have internal predecessors, (490), 118 states have call successors, (118), 39 states have call predecessors, (118), 38 states have return successors, (115), 114 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-02 14:59:06,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 723 transitions. [2021-05-02 14:59:06,575 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 723 transitions. Word has length 69 [2021-05-02 14:59:06,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:06,576 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 723 transitions. [2021-05-02 14:59:06,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:06,576 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 723 transitions. [2021-05-02 14:59:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 14:59:06,576 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:06,576 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1] [2021-05-02 14:59:06,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 14:59:06,793 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:06,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:06,793 INFO L82 PathProgramCache]: Analyzing trace with hash 862858316, now seen corresponding path program 2 times [2021-05-02 14:59:06,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:06,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159462101] [2021-05-02 14:59:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:06,800 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:06,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515370947] [2021-05-02 14:59:06,800 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 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 14:59:06,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:59:06,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:06,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:59:06,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:06,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:59:06,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:06,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159462101] [2021-05-02 14:59:06,996 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:06,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515370947] [2021-05-02 14:59:06,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515370947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:06,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:06,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:59:06,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666628109] [2021-05-02 14:59:06,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:59:06,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:06,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:59:06,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:59:06,997 INFO L87 Difference]: Start difference. First operand 540 states and 723 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:07,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:07,171 INFO L93 Difference]: Finished difference Result 852 states and 1151 transitions. [2021-05-02 14:59:07,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:59:07,172 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2021-05-02 14:59:07,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:07,174 INFO L225 Difference]: With dead ends: 852 [2021-05-02 14:59:07,174 INFO L226 Difference]: Without dead ends: 660 [2021-05-02 14:59:07,175 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:59:07,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-05-02 14:59:07,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 627. [2021-05-02 14:59:07,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 441 states have (on average 1.256235827664399) internal successors, (554), 445 states have internal predecessors, (554), 135 states have call successors, (135), 51 states have call predecessors, (135), 50 states have return successors, (131), 130 states have call predecessors, (131), 131 states have call successors, (131) [2021-05-02 14:59:07,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 820 transitions. [2021-05-02 14:59:07,202 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 820 transitions. Word has length 70 [2021-05-02 14:59:07,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:07,203 INFO L480 AbstractCegarLoop]: Abstraction has 627 states and 820 transitions. [2021-05-02 14:59:07,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 820 transitions. [2021-05-02 14:59:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 14:59:07,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:07,204 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2021-05-02 14:59:07,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 14:59:07,417 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:07,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:07,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1546062343, now seen corresponding path program 1 times [2021-05-02 14:59:07,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:07,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058511952] [2021-05-02 14:59:07,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:07,422 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:07,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891049549] [2021-05-02 14:59:07,422 INFO L95 rtionOrderModulation]: Keeping assertion order 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 14:59:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:07,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 14:59:07,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:07,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:59:07,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:07,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058511952] [2021-05-02 14:59:07,831 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:07,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891049549] [2021-05-02 14:59:07,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891049549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:07,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:07,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:59:07,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111763501] [2021-05-02 14:59:07,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:59:07,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:07,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:59:07,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:59:07,832 INFO L87 Difference]: Start difference. First operand 627 states and 820 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:59:09,106 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-02 14:59:09,408 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-05-02 14:59:09,589 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-02 14:59:10,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:10,450 INFO L93 Difference]: Finished difference Result 800 states and 1079 transitions. [2021-05-02 14:59:10,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 14:59:10,450 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 70 [2021-05-02 14:59:10,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:10,453 INFO L225 Difference]: With dead ends: 800 [2021-05-02 14:59:10,453 INFO L226 Difference]: Without dead ends: 798 [2021-05-02 14:59:10,453 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1583.9ms TimeCoverageRelationStatistics Valid=417, Invalid=1935, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 14:59:10,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-05-02 14:59:10,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 749. [2021-05-02 14:59:10,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 530 states have (on average 1.288679245283019) internal successors, (683), 534 states have internal predecessors, (683), 167 states have call successors, (167), 52 states have call predecessors, (167), 51 states have return successors, (163), 162 states have call predecessors, (163), 163 states have call successors, (163) [2021-05-02 14:59:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1013 transitions. [2021-05-02 14:59:10,490 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1013 transitions. Word has length 70 [2021-05-02 14:59:10,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:10,490 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 1013 transitions. [2021-05-02 14:59:10,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:59:10,490 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1013 transitions. [2021-05-02 14:59:10,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 14:59:10,491 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:10,491 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 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] [2021-05-02 14:59:10,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 14:59:10,705 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:10,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:10,705 INFO L82 PathProgramCache]: Analyzing trace with hash -528746969, now seen corresponding path program 1 times [2021-05-02 14:59:10,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:10,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757118835] [2021-05-02 14:59:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:10,710 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:10,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239939375] [2021-05-02 14:59:10,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:59:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:10,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 14:59:10,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:10,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:10,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:10,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:10,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:10,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:10,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:10,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:10,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:10,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:10,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:10,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:10,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:10,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:10,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:10,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:10,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:10,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:10,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-02 14:59:10,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:10,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757118835] [2021-05-02 14:59:10,925 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:10,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239939375] [2021-05-02 14:59:10,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239939375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:10,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:10,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:59:10,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730857422] [2021-05-02 14:59:10,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:59:10,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:10,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:59:10,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:59:10,926 INFO L87 Difference]: Start difference. First operand 749 states and 1013 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:59:11,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:11,365 INFO L93 Difference]: Finished difference Result 1024 states and 1449 transitions. [2021-05-02 14:59:11,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 14:59:11,366 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 74 [2021-05-02 14:59:11,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:11,369 INFO L225 Difference]: With dead ends: 1024 [2021-05-02 14:59:11,369 INFO L226 Difference]: Without dead ends: 1022 [2021-05-02 14:59:11,370 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 183.0ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-05-02 14:59:11,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-05-02 14:59:11,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 779. [2021-05-02 14:59:11,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 545 states have (on average 1.2862385321100918) internal successors, (701), 552 states have internal predecessors, (701), 179 states have call successors, (179), 55 states have call predecessors, (179), 54 states have return successors, (175), 171 states have call predecessors, (175), 175 states have call successors, (175) [2021-05-02 14:59:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1055 transitions. [2021-05-02 14:59:11,412 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1055 transitions. Word has length 74 [2021-05-02 14:59:11,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:11,412 INFO L480 AbstractCegarLoop]: Abstraction has 779 states and 1055 transitions. [2021-05-02 14:59:11,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:59:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1055 transitions. [2021-05-02 14:59:11,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 14:59:11,412 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:11,413 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-02 14:59:11,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 14:59:11,627 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:11,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:11,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2070693174, now seen corresponding path program 2 times [2021-05-02 14:59:11,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:11,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740097993] [2021-05-02 14:59:11,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:11,642 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:11,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132020369] [2021-05-02 14:59:11,643 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 14:59:11,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:59:11,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:11,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 14:59:11,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:11,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-05-02 14:59:11,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:11,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740097993] [2021-05-02 14:59:11,844 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:11,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132020369] [2021-05-02 14:59:11,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132020369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:11,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:11,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:59:11,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662791574] [2021-05-02 14:59:11,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:59:11,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:11,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:59:11,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:59:11,846 INFO L87 Difference]: Start difference. First operand 779 states and 1055 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:59:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:12,126 INFO L93 Difference]: Finished difference Result 978 states and 1364 transitions. [2021-05-02 14:59:12,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:59:12,126 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 73 [2021-05-02 14:59:12,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:12,129 INFO L225 Difference]: With dead ends: 978 [2021-05-02 14:59:12,129 INFO L226 Difference]: Without dead ends: 976 [2021-05-02 14:59:12,129 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-05-02 14:59:12,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-05-02 14:59:12,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 897. [2021-05-02 14:59:12,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 621 states have (on average 1.317230273752013) internal successors, (818), 628 states have internal predecessors, (818), 219 states have call successors, (219), 57 states have call predecessors, (219), 56 states have return successors, (215), 211 states have call predecessors, (215), 215 states have call successors, (215) [2021-05-02 14:59:12,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1252 transitions. [2021-05-02 14:59:12,193 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1252 transitions. Word has length 73 [2021-05-02 14:59:12,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:12,193 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 1252 transitions. [2021-05-02 14:59:12,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:59:12,193 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1252 transitions. [2021-05-02 14:59:12,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 14:59:12,194 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:12,194 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 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, 1, 1] [2021-05-02 14:59:12,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:12,408 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:12,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:12,409 INFO L82 PathProgramCache]: Analyzing trace with hash -705069158, now seen corresponding path program 3 times [2021-05-02 14:59:12,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:12,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030143962] [2021-05-02 14:59:12,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:12,413 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:12,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898448401] [2021-05-02 14:59:12,413 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 14:59:12,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:59:12,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:12,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 14:59:12,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:12,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 21 proven. 36 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 14:59:12,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:12,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030143962] [2021-05-02 14:59:12,877 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:12,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898448401] [2021-05-02 14:59:12,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898448401] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:12,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:12,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 14:59:12,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823454891] [2021-05-02 14:59:12,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 14:59:12,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:12,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 14:59:12,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:59:12,878 INFO L87 Difference]: Start difference. First operand 897 states and 1252 transitions. Second operand has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:59:13,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:13,569 INFO L93 Difference]: Finished difference Result 979 states and 1364 transitions. [2021-05-02 14:59:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:59:13,573 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 75 [2021-05-02 14:59:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:13,575 INFO L225 Difference]: With dead ends: 979 [2021-05-02 14:59:13,575 INFO L226 Difference]: Without dead ends: 977 [2021-05-02 14:59:13,576 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 452.8ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-05-02 14:59:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-05-02 14:59:13,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 957. [2021-05-02 14:59:13,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 660 states have (on average 1.3212121212121213) internal successors, (872), 668 states have internal predecessors, (872), 236 states have call successors, (236), 61 states have call predecessors, (236), 60 states have return successors, (232), 227 states have call predecessors, (232), 232 states have call successors, (232) [2021-05-02 14:59:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1340 transitions. [2021-05-02 14:59:13,636 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1340 transitions. Word has length 75 [2021-05-02 14:59:13,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:13,636 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 1340 transitions. [2021-05-02 14:59:13,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:59:13,636 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1340 transitions. [2021-05-02 14:59:13,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 14:59:13,637 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:13,637 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:13,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:13,849 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:13,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:13,850 INFO L82 PathProgramCache]: Analyzing trace with hash -949871629, now seen corresponding path program 3 times [2021-05-02 14:59:13,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:13,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503021623] [2021-05-02 14:59:13,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:13,857 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:13,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503069843] [2021-05-02 14:59:13,858 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 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 14:59:13,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:59:13,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:13,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:59:13,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:13,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:13,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,058 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:59:14,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:14,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503021623] [2021-05-02 14:59:14,058 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:14,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503069843] [2021-05-02 14:59:14,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503069843] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:14,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:14,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:59:14,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747133630] [2021-05-02 14:59:14,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:59:14,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:14,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:59:14,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:59:14,059 INFO L87 Difference]: Start difference. First operand 957 states and 1340 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:14,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:14,284 INFO L93 Difference]: Finished difference Result 1736 states and 2484 transitions. [2021-05-02 14:59:14,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:59:14,285 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2021-05-02 14:59:14,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:14,288 INFO L225 Difference]: With dead ends: 1736 [2021-05-02 14:59:14,288 INFO L226 Difference]: Without dead ends: 1138 [2021-05-02 14:59:14,289 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:59:14,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-05-02 14:59:14,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1108. [2021-05-02 14:59:14,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 764 states have (on average 1.2905759162303665) internal successors, (986), 773 states have internal predecessors, (986), 268 states have call successors, (268), 76 states have call predecessors, (268), 75 states have return successors, (263), 258 states have call predecessors, (263), 263 states have call successors, (263) [2021-05-02 14:59:14,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1517 transitions. [2021-05-02 14:59:14,349 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1517 transitions. Word has length 76 [2021-05-02 14:59:14,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:14,349 INFO L480 AbstractCegarLoop]: Abstraction has 1108 states and 1517 transitions. [2021-05-02 14:59:14,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:59:14,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1517 transitions. [2021-05-02 14:59:14,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 14:59:14,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:14,350 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 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 14:59:14,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:14,564 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:14,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:14,565 INFO L82 PathProgramCache]: Analyzing trace with hash -362795852, now seen corresponding path program 1 times [2021-05-02 14:59:14,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:14,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865649585] [2021-05-02 14:59:14,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:14,569 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:14,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1857064439] [2021-05-02 14:59:14,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:59:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:14,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-02 14:59:14,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:14,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 23 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-05-02 14:59:14,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:14,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865649585] [2021-05-02 14:59:14,953 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:14,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857064439] [2021-05-02 14:59:14,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857064439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:14,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:14,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 14:59:14,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043384520] [2021-05-02 14:59:14,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 14:59:14,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:14,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 14:59:14,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:59:14,955 INFO L87 Difference]: Start difference. First operand 1108 states and 1517 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:59:15,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:15,551 INFO L93 Difference]: Finished difference Result 1180 states and 1616 transitions. [2021-05-02 14:59:15,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 14:59:15,559 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 81 [2021-05-02 14:59:15,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:15,562 INFO L225 Difference]: With dead ends: 1180 [2021-05-02 14:59:15,562 INFO L226 Difference]: Without dead ends: 1177 [2021-05-02 14:59:15,563 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 351.3ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-05-02 14:59:15,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-05-02 14:59:15,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1162. [2021-05-02 14:59:15,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 798 states have (on average 1.2907268170426065) internal successors, (1030), 805 states have internal predecessors, (1030), 283 states have call successors, (283), 81 states have call predecessors, (283), 80 states have return successors, (279), 275 states have call predecessors, (279), 279 states have call successors, (279) [2021-05-02 14:59:15,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1592 transitions. [2021-05-02 14:59:15,633 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1592 transitions. Word has length 81 [2021-05-02 14:59:15,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:15,633 INFO L480 AbstractCegarLoop]: Abstraction has 1162 states and 1592 transitions. [2021-05-02 14:59:15,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:59:15,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1592 transitions. [2021-05-02 14:59:15,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:59:15,634 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:15,634 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 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] [2021-05-02 14:59:15,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 14:59:15,850 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:15,850 INFO L82 PathProgramCache]: Analyzing trace with hash -2112645673, now seen corresponding path program 1 times [2021-05-02 14:59:15,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:15,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857594319] [2021-05-02 14:59:15,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:15,855 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:15,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304272005] [2021-05-02 14:59:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:15,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:59:15,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:15,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:15,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 88 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 14:59:16,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:16,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857594319] [2021-05-02 14:59:16,034 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:16,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304272005] [2021-05-02 14:59:16,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304272005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:16,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:16,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:59:16,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001134932] [2021-05-02 14:59:16,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:59:16,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:16,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:59:16,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:59:16,035 INFO L87 Difference]: Start difference. First operand 1162 states and 1592 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:59:16,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:16,212 INFO L93 Difference]: Finished difference Result 1175 states and 1601 transitions. [2021-05-02 14:59:16,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:59:16,212 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-05-02 14:59:16,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:16,215 INFO L225 Difference]: With dead ends: 1175 [2021-05-02 14:59:16,215 INFO L226 Difference]: Without dead ends: 1168 [2021-05-02 14:59:16,216 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:59:16,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-05-02 14:59:16,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1162. [2021-05-02 14:59:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 798 states have (on average 1.2882205513784462) internal successors, (1028), 805 states have internal predecessors, (1028), 283 states have call successors, (283), 81 states have call predecessors, (283), 80 states have return successors, (279), 275 states have call predecessors, (279), 279 states have call successors, (279) [2021-05-02 14:59:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1590 transitions. [2021-05-02 14:59:16,276 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1590 transitions. Word has length 87 [2021-05-02 14:59:16,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:16,276 INFO L480 AbstractCegarLoop]: Abstraction has 1162 states and 1590 transitions. [2021-05-02 14:59:16,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:59:16,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1590 transitions. [2021-05-02 14:59:16,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 14:59:16,277 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:16,277 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 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] [2021-05-02 14:59:16,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:16,493 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:16,493 INFO L82 PathProgramCache]: Analyzing trace with hash -790944287, now seen corresponding path program 2 times [2021-05-02 14:59:16,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:16,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74054885] [2021-05-02 14:59:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:16,500 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:16,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610968038] [2021-05-02 14:59:16,500 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:16,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:59:16,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:16,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 14:59:16,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:16,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-02 14:59:16,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:16,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74054885] [2021-05-02 14:59:16,707 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:16,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610968038] [2021-05-02 14:59:16,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610968038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:16,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:16,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:59:16,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516715146] [2021-05-02 14:59:16,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:59:16,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:16,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:59:16,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:59:16,708 INFO L87 Difference]: Start difference. First operand 1162 states and 1590 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:59:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:16,960 INFO L93 Difference]: Finished difference Result 1203 states and 1644 transitions. [2021-05-02 14:59:16,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:59:16,960 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 90 [2021-05-02 14:59:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:16,963 INFO L225 Difference]: With dead ends: 1203 [2021-05-02 14:59:16,964 INFO L226 Difference]: Without dead ends: 1201 [2021-05-02 14:59:16,964 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:59:16,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-05-02 14:59:17,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1177. [2021-05-02 14:59:17,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 807 states have (on average 1.2862453531598512) internal successors, (1038), 814 states have internal predecessors, (1038), 287 states have call successors, (287), 83 states have call predecessors, (287), 82 states have return successors, (283), 279 states have call predecessors, (283), 283 states have call successors, (283) [2021-05-02 14:59:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1608 transitions. [2021-05-02 14:59:17,029 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1608 transitions. Word has length 90 [2021-05-02 14:59:17,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:17,029 INFO L480 AbstractCegarLoop]: Abstraction has 1177 states and 1608 transitions. [2021-05-02 14:59:17,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:59:17,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1608 transitions. [2021-05-02 14:59:17,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 14:59:17,030 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:17,030 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 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] [2021-05-02 14:59:17,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 14:59:17,245 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:17,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:17,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1082523945, now seen corresponding path program 2 times [2021-05-02 14:59:17,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:17,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213513583] [2021-05-02 14:59:17,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:17,251 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:17,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178044369] [2021-05-02 14:59:17,251 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:17,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:59:17,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:17,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 101 conjunts are in the unsatisfiable core [2021-05-02 14:59:17,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:17,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 51 proven. 42 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-05-02 14:59:17,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:17,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213513583] [2021-05-02 14:59:17,908 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:17,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178044369] [2021-05-02 14:59:17,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178044369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:17,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:17,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 14:59:17,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522731689] [2021-05-02 14:59:17,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 14:59:17,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:17,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 14:59:17,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-02 14:59:17,910 INFO L87 Difference]: Start difference. First operand 1177 states and 1608 transitions. Second operand has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 14:59:18,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:18,909 INFO L93 Difference]: Finished difference Result 1267 states and 1736 transitions. [2021-05-02 14:59:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 14:59:18,909 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 88 [2021-05-02 14:59:18,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:18,913 INFO L225 Difference]: With dead ends: 1267 [2021-05-02 14:59:18,913 INFO L226 Difference]: Without dead ends: 1264 [2021-05-02 14:59:18,914 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 626.3ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-05-02 14:59:18,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-05-02 14:59:18,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1243. [2021-05-02 14:59:18,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 845 states have (on average 1.2899408284023668) internal successors, (1090), 853 states have internal predecessors, (1090), 311 states have call successors, (311), 87 states have call predecessors, (311), 86 states have return successors, (307), 302 states have call predecessors, (307), 307 states have call successors, (307) [2021-05-02 14:59:18,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1708 transitions. [2021-05-02 14:59:18,995 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1708 transitions. Word has length 88 [2021-05-02 14:59:18,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:18,996 INFO L480 AbstractCegarLoop]: Abstraction has 1243 states and 1708 transitions. [2021-05-02 14:59:18,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 14:59:18,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1708 transitions. [2021-05-02 14:59:18,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 14:59:18,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:18,997 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 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] [2021-05-02 14:59:19,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:19,212 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:19,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:19,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1791236545, now seen corresponding path program 2 times [2021-05-02 14:59:19,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:19,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171391442] [2021-05-02 14:59:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:19,231 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:19,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273092574] [2021-05-02 14:59:19,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:19,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:59:19,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:19,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:59:19,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:19,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 14:59:19,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:19,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171391442] [2021-05-02 14:59:19,444 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:19,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273092574] [2021-05-02 14:59:19,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273092574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:19,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:19,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:59:19,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419934852] [2021-05-02 14:59:19,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:59:19,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:19,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:59:19,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:59:19,447 INFO L87 Difference]: Start difference. First operand 1243 states and 1708 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:59:19,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:19,677 INFO L93 Difference]: Finished difference Result 1280 states and 1744 transitions. [2021-05-02 14:59:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:59:19,678 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 91 [2021-05-02 14:59:19,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:19,681 INFO L225 Difference]: With dead ends: 1280 [2021-05-02 14:59:19,682 INFO L226 Difference]: Without dead ends: 1273 [2021-05-02 14:59:19,682 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:59:19,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-05-02 14:59:19,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1254. [2021-05-02 14:59:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 856 states have (on average 1.286214953271028) internal successors, (1101), 864 states have internal predecessors, (1101), 311 states have call successors, (311), 87 states have call predecessors, (311), 86 states have return successors, (307), 302 states have call predecessors, (307), 307 states have call successors, (307) [2021-05-02 14:59:19,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1719 transitions. [2021-05-02 14:59:19,751 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1719 transitions. Word has length 91 [2021-05-02 14:59:19,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:19,751 INFO L480 AbstractCegarLoop]: Abstraction has 1254 states and 1719 transitions. [2021-05-02 14:59:19,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:59:19,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1719 transitions. [2021-05-02 14:59:19,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 14:59:19,752 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:19,752 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 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] [2021-05-02 14:59:19,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 14:59:19,961 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:19,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:19,961 INFO L82 PathProgramCache]: Analyzing trace with hash -554609469, now seen corresponding path program 1 times [2021-05-02 14:59:19,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:19,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704408946] [2021-05-02 14:59:19,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:19,965 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:19,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495960793] [2021-05-02 14:59:19,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:20,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:59:20,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:20,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 14:59:20,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:20,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704408946] [2021-05-02 14:59:20,150 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:20,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495960793] [2021-05-02 14:59:20,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495960793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:20,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:20,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:59:20,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092573500] [2021-05-02 14:59:20,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:59:20,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:20,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:59:20,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:59:20,152 INFO L87 Difference]: Start difference. First operand 1254 states and 1719 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:59:20,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:20,395 INFO L93 Difference]: Finished difference Result 1568 states and 2190 transitions. [2021-05-02 14:59:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:59:20,396 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 93 [2021-05-02 14:59:20,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:20,399 INFO L225 Difference]: With dead ends: 1568 [2021-05-02 14:59:20,399 INFO L226 Difference]: Without dead ends: 1280 [2021-05-02 14:59:20,400 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:59:20,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-05-02 14:59:20,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1274. [2021-05-02 14:59:20,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 876 states have (on average 1.278538812785388) internal successors, (1120), 884 states have internal predecessors, (1120), 311 states have call successors, (311), 87 states have call predecessors, (311), 86 states have return successors, (307), 302 states have call predecessors, (307), 307 states have call successors, (307) [2021-05-02 14:59:20,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1738 transitions. [2021-05-02 14:59:20,473 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1738 transitions. Word has length 93 [2021-05-02 14:59:20,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:20,473 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 1738 transitions. [2021-05-02 14:59:20,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:59:20,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1738 transitions. [2021-05-02 14:59:20,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 14:59:20,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:20,474 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 14:59:20,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 14:59:20,689 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:20,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:20,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1287129886, now seen corresponding path program 2 times [2021-05-02 14:59:20,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:20,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875396648] [2021-05-02 14:59:20,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:20,693 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:20,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771118554] [2021-05-02 14:59:20,693 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:20,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:59:20,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:20,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 14:59:20,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:20,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-05-02 14:59:20,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:20,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875396648] [2021-05-02 14:59:20,944 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:20,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771118554] [2021-05-02 14:59:20,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771118554] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:20,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:20,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:59:20,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671856234] [2021-05-02 14:59:20,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:59:20,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:20,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:59:20,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:59:20,946 INFO L87 Difference]: Start difference. First operand 1274 states and 1738 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:59:21,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:21,556 INFO L93 Difference]: Finished difference Result 1571 states and 2215 transitions. [2021-05-02 14:59:21,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 14:59:21,556 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 97 [2021-05-02 14:59:21,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:21,560 INFO L225 Difference]: With dead ends: 1571 [2021-05-02 14:59:21,560 INFO L226 Difference]: Without dead ends: 1569 [2021-05-02 14:59:21,561 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 239.3ms TimeCoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 14:59:21,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-05-02 14:59:21,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1310. [2021-05-02 14:59:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 894 states have (on average 1.2818791946308725) internal successors, (1146), 902 states have internal predecessors, (1146), 327 states have call successors, (327), 89 states have call predecessors, (327), 88 states have return successors, (323), 318 states have call predecessors, (323), 323 states have call successors, (323) [2021-05-02 14:59:21,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1796 transitions. [2021-05-02 14:59:21,642 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1796 transitions. Word has length 97 [2021-05-02 14:59:21,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:21,642 INFO L480 AbstractCegarLoop]: Abstraction has 1310 states and 1796 transitions. [2021-05-02 14:59:21,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:59:21,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1796 transitions. [2021-05-02 14:59:21,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 14:59:21,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:21,643 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 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] [2021-05-02 14:59:21,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:21,857 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:21,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:21,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2034142563, now seen corresponding path program 3 times [2021-05-02 14:59:21,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:21,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329031153] [2021-05-02 14:59:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:21,861 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:21,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310438043] [2021-05-02 14:59:21,861 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:21,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:59:21,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:21,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 14:59:21,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:21,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:21,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:21,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:21,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:21,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:21,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:21,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:21,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:21,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:21,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:21,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:21,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:21,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:21,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:21,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:21,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:21,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:21,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,099 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 14:59:22,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:22,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329031153] [2021-05-02 14:59:22,099 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:22,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310438043] [2021-05-02 14:59:22,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310438043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:22,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:22,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:59:22,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688564866] [2021-05-02 14:59:22,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:59:22,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:22,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:59:22,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:59:22,101 INFO L87 Difference]: Start difference. First operand 1310 states and 1796 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:59:22,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:22,370 INFO L93 Difference]: Finished difference Result 1873 states and 2591 transitions. [2021-05-02 14:59:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 14:59:22,371 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2021-05-02 14:59:22,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:22,376 INFO L225 Difference]: With dead ends: 1873 [2021-05-02 14:59:22,376 INFO L226 Difference]: Without dead ends: 1524 [2021-05-02 14:59:22,378 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:59:22,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-05-02 14:59:22,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1466. [2021-05-02 14:59:22,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 986 states have (on average 1.268762677484787) internal successors, (1251), 995 states have internal predecessors, (1251), 368 states have call successors, (368), 112 states have call predecessors, (368), 111 states have return successors, (363), 358 states have call predecessors, (363), 363 states have call successors, (363) [2021-05-02 14:59:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 1982 transitions. [2021-05-02 14:59:22,470 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 1982 transitions. Word has length 97 [2021-05-02 14:59:22,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:22,470 INFO L480 AbstractCegarLoop]: Abstraction has 1466 states and 1982 transitions. [2021-05-02 14:59:22,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:59:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 1982 transitions. [2021-05-02 14:59:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 14:59:22,471 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:22,471 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 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] [2021-05-02 14:59:22,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:22,685 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:22,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:22,685 INFO L82 PathProgramCache]: Analyzing trace with hash 516983514, now seen corresponding path program 4 times [2021-05-02 14:59:22,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:22,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995144560] [2021-05-02 14:59:22,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:22,689 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:22,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066299141] [2021-05-02 14:59:22,689 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:22,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:59:22,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:59:22,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 14:59:22,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:22,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:22,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:23,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:23,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:23,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:23,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:23,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:23,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:23,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 33 proven. 61 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-05-02 14:59:23,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:23,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995144560] [2021-05-02 14:59:23,343 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:23,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066299141] [2021-05-02 14:59:23,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066299141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:23,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:23,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 14:59:23,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065775989] [2021-05-02 14:59:23,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 14:59:23,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:23,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 14:59:23,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:59:23,344 INFO L87 Difference]: Start difference. First operand 1466 states and 1982 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:59:24,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:24,339 INFO L93 Difference]: Finished difference Result 1531 states and 2077 transitions. [2021-05-02 14:59:24,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 14:59:24,340 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 97 [2021-05-02 14:59:24,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:24,344 INFO L225 Difference]: With dead ends: 1531 [2021-05-02 14:59:24,344 INFO L226 Difference]: Without dead ends: 1529 [2021-05-02 14:59:24,344 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 699.1ms TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-05-02 14:59:24,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2021-05-02 14:59:24,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1507. [2021-05-02 14:59:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1010 states have (on average 1.2742574257425743) internal successors, (1287), 1019 states have internal predecessors, (1287), 384 states have call successors, (384), 113 states have call predecessors, (384), 112 states have return successors, (379), 374 states have call predecessors, (379), 379 states have call successors, (379) [2021-05-02 14:59:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 2050 transitions. [2021-05-02 14:59:24,432 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 2050 transitions. Word has length 97 [2021-05-02 14:59:24,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:24,433 INFO L480 AbstractCegarLoop]: Abstraction has 1507 states and 2050 transitions. [2021-05-02 14:59:24,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:59:24,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 2050 transitions. [2021-05-02 14:59:24,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 14:59:24,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:24,434 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 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] [2021-05-02 14:59:24,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:24,649 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:24,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:24,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1787026468, now seen corresponding path program 3 times [2021-05-02 14:59:24,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:24,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799748636] [2021-05-02 14:59:24,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:24,656 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:24,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697989641] [2021-05-02 14:59:24,656 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:24,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 14:59:24,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 14:59:24,731 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 14:59:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 14:59:24,767 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 14:59:24,851 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 14:59:24,851 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 14:59:25,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 14:59:25,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:59:25 BoogieIcfgContainer [2021-05-02 14:59:25,122 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:59:25,122 INFO L168 Benchmark]: Toolchain (without parser) took 31462.58 ms. Allocated memory was 203.4 MB in the beginning and 423.6 MB in the end (delta: 220.2 MB). Free memory was 168.3 MB in the beginning and 200.0 MB in the end (delta: -31.7 MB). Peak memory consumption was 189.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:59:25,122 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 203.4 MB. Free memory is still 184.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:59:25,122 INFO L168 Benchmark]: CACSL2BoogieTranslator took 144.05 ms. Allocated memory is still 203.4 MB. Free memory was 168.2 MB in the beginning and 158.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 14:59:25,123 INFO L168 Benchmark]: Boogie Preprocessor took 55.78 ms. Allocated memory is still 203.4 MB. Free memory was 157.9 MB in the beginning and 186.0 MB in the end (delta: -28.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 8.0 GB. [2021-05-02 14:59:25,123 INFO L168 Benchmark]: RCFGBuilder took 255.44 ms. Allocated memory is still 203.4 MB. Free memory was 186.0 MB in the beginning and 168.1 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:59:25,123 INFO L168 Benchmark]: TraceAbstraction took 31002.19 ms. Allocated memory was 203.4 MB in the beginning and 423.6 MB in the end (delta: 220.2 MB). Free memory was 167.6 MB in the beginning and 200.0 MB in the end (delta: -32.4 MB). Peak memory consumption was 188.3 MB. Max. memory is 8.0 GB. [2021-05-02 14:59:25,124 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 203.4 MB. Free memory is still 184.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 144.05 ms. Allocated memory is still 203.4 MB. Free memory was 168.2 MB in the beginning and 158.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.78 ms. Allocated memory is still 203.4 MB. Free memory was 157.9 MB in the beginning and 186.0 MB in the end (delta: -28.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 255.44 ms. Allocated memory is still 203.4 MB. Free memory was 186.0 MB in the beginning and 168.1 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 31002.19 ms. Allocated memory was 203.4 MB in the beginning and 423.6 MB in the end (delta: 220.2 MB). Free memory was 167.6 MB in the beginning and 200.0 MB in the end (delta: -32.4 MB). Peak memory consumption was 188.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=17, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=3, y=5] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=3, y=5] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=3, b=5, counter=0, p=1, q=0, r=0, s=1, x=3, y=5] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=5, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=5, c=3, counter=1, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=5, c=3, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=3, b=5, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=5, b=3, c=3, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L34] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=3, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=5, b=3, c=5, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=5, b=3, c=5, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L48] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=5, b=3, c=2, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=2, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=5, b=3, c=2, counter=6, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=8, counter++=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=3, b=2, c=3, counter=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L48] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, counter++=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=3, b=2, c=1, counter=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=10, counter++=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=3, b=2, c=1, counter=10, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=2, x=3, y=5] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=11, counter++=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=2, x=3, y=5] [L34] COND FALSE !(counter++<10) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=11] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 30915.1ms, OverallIterations: 42, TraceHistogramMax: 12, EmptinessCheckTime: 34.2ms, AutomataDifference: 11799.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2491 SDtfs, 3537 SDslu, 12163 SDs, 0 SdLazy, 9332 SolverSat, 2069 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5274.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2602 GetRequests, 2015 SyntacticMatches, 5 SemanticMatches, 582 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 6087.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1507occurred in iteration=41, InterpolantAutomatonStates: 543, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1318.2ms AutomataMinimizationTime, 41 MinimizatonAttempts, 1548 StatesRemovedByMinimization, 38 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 309.0ms SsaConstructionTime, 945.4ms SatisfiabilityAnalysisTime, 6450.3ms InterpolantComputationTime, 2498 NumberOfCodeBlocks, 2441 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 2359 ConstructedInterpolants, 0 QuantifiedInterpolants, 12276 SizeOfPredicates, 240 NumberOfNonLiveVariables, 9203 ConjunctsInSsa, 955 ConjunctsInUnsatCore, 41 InterpolantComputations, 9 PerfectInterpolantSequences, 2039/2901 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...