/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/hard-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:09:28,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:09:28,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:09:28,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:09:28,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:09:28,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:09:28,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:09:28,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:09:28,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:09:28,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:09:28,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:09:28,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:09:28,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:09:28,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:09:28,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:09:28,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:09:28,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:09:28,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:09:28,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:09:28,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:09:28,755 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 [2021-05-06 03:09:28,770 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:09:28,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:09:28,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:09:28,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:09:28,772 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:09:28,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:09:28,780 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:09:28,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:09:28,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:09:28,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:09:28,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:09:28,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:09:28,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:09:28,781 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:09:28,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:09:28,781 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:09:28,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:09:28,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:09:28,781 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:09:28,781 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:09:28,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:09:28,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:09:28,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:09:28,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:09:28,782 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:09:28,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:09:28,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:09:28,782 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:09:28,782 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:09:29,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:09:29,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:09:29,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:09:29,086 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:09:29,087 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:09:29,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound50.c [2021-05-06 03:09:29,149 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39396321b/14c0d7ea087a4b1ab1dc80f620e5deb4/FLAG5eae6e7b8 [2021-05-06 03:09:29,661 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:09:29,661 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound50.c [2021-05-06 03:09:29,681 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39396321b/14c0d7ea087a4b1ab1dc80f620e5deb4/FLAG5eae6e7b8 [2021-05-06 03:09:29,903 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39396321b/14c0d7ea087a4b1ab1dc80f620e5deb4 [2021-05-06 03:09:29,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:09:29,906 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:09:29,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:09:29,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:09:29,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:09:29,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:09:29" (1/1) ... [2021-05-06 03:09:29,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@520cc236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:29, skipping insertion in model container [2021-05-06 03:09:29,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:09:29" (1/1) ... [2021-05-06 03:09:29,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:09:29,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:09:30,036 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/hard-ll_unwindbound50.c[546,559] [2021-05-06 03:09:30,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:09:30,059 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:09:30,068 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/hard-ll_unwindbound50.c[546,559] [2021-05-06 03:09:30,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:09:30,094 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:09:30,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:30 WrapperNode [2021-05-06 03:09:30,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:09:30,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:09:30,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:09:30,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:09:30,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:30" (1/1) ... [2021-05-06 03:09:30,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:30" (1/1) ... [2021-05-06 03:09:30,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:30" (1/1) ... [2021-05-06 03:09:30,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:30" (1/1) ... [2021-05-06 03:09:30,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:30" (1/1) ... [2021-05-06 03:09:30,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:30" (1/1) ... [2021-05-06 03:09:30,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:30" (1/1) ... [2021-05-06 03:09:30,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:09:30,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:09:30,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:09:30,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:09:30,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:30" (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 [2021-05-06 03:09:30,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:09:30,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:09:30,231 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:09:30,231 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:09:30,231 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:09:30,231 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:09:30,231 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:09:30,231 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:09:30,231 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:09:30,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:09:30,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:09:30,232 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:09:30,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:09:30,232 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:09:30,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:09:30,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:09:30,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:09:30,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:09:30,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:09:30,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:09:30,460 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:09:30,460 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:09:30,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:09:30 BoogieIcfgContainer [2021-05-06 03:09:30,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:09:30,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:09:30,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:09:30,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:09:30,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:09:29" (1/3) ... [2021-05-06 03:09:30,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7464d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:09:30, skipping insertion in model container [2021-05-06 03:09:30,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:30" (2/3) ... [2021-05-06 03:09:30,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7464d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:09:30, skipping insertion in model container [2021-05-06 03:09:30,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:09:30" (3/3) ... [2021-05-06 03:09:30,466 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound50.c [2021-05-06 03:09:30,489 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:09:30,491 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:09:30,501 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:09:30,530 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:09:30,530 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:09:30,530 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:09:30,530 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:09:30,530 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:09:30,530 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:09:30,530 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:09:30,530 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:09:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:09:30,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 03:09:30,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:30,560 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:30,560 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:30,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:30,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2021-05-06 03:09:30,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:30,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561818366] [2021-05-06 03:09:30,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:30,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:09:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:30,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:09:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:09:30,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:30,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561818366] [2021-05-06 03:09:30,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561818366] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:30,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:30,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:09:30,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588039782] [2021-05-06 03:09:30,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:09:30,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:30,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:09:30,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:09:30,802 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:09:30,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:30,918 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2021-05-06 03:09:30,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:09:30,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 03:09:30,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:30,924 INFO L225 Difference]: With dead ends: 66 [2021-05-06 03:09:30,924 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:09:30,927 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:09:30,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:09:30,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-06 03:09:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:09:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 03:09:30,964 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-06 03:09:30,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:30,964 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 03:09:30,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:09:30,965 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 03:09:30,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 03:09:30,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:30,965 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:30,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:09:30,966 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:30,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:30,968 INFO L82 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2021-05-06 03:09:30,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:30,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728113539] [2021-05-06 03:09:30,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:31,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:09:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:31,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:09:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:09:31,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:31,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728113539] [2021-05-06 03:09:31,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728113539] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:31,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:31,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:09:31,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786114457] [2021-05-06 03:09:31,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:09:31,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:31,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:09:31,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:31,085 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:09:31,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:31,268 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-06 03:09:31,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:09:31,269 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 03:09:31,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:31,270 INFO L225 Difference]: With dead ends: 47 [2021-05-06 03:09:31,270 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 03:09:31,271 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:09:31,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 03:09:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-06 03:09:31,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:09:31,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 03:09:31,277 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-06 03:09:31,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:31,278 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 03:09:31,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:09:31,278 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 03:09:31,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 03:09:31,278 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:31,278 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:31,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:09:31,279 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:31,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:31,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2021-05-06 03:09:31,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:31,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851020913] [2021-05-06 03:09:31,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:31,289 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:31,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628557120] [2021-05-06 03:09:31,289 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 [2021-05-06 03:09:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:31,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 03:09:31,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:31,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:31,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:31,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:31,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:31,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:09:31,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:31,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851020913] [2021-05-06 03:09:31,409 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:31,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628557120] [2021-05-06 03:09:31,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628557120] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:31,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:31,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 03:09:31,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572391240] [2021-05-06 03:09:31,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 03:09:31,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:31,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 03:09:31,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:09:31,411 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:09:31,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:31,421 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2021-05-06 03:09:31,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 03:09:31,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 03:09:31,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:31,422 INFO L225 Difference]: With dead ends: 52 [2021-05-06 03:09:31,422 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 03:09:31,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:09:31,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 03:09:31,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 03:09:31,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:09:31,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-06 03:09:31,428 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-06 03:09:31,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:31,428 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-06 03:09:31,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:09:31,443 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-06 03:09:31,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 03:09:31,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:31,443 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:31,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 03:09:31,661 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:31,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:31,661 INFO L82 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2021-05-06 03:09:31,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:31,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814587135] [2021-05-06 03:09:31,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:31,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:09:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:31,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:09:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:31,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-06 03:09:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:09:31,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:31,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814587135] [2021-05-06 03:09:31,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814587135] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:31,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:31,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:09:31,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912577159] [2021-05-06 03:09:31,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:09:31,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:31,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:09:31,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:31,748 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:09:31,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:31,941 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-06 03:09:31,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:09:31,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 03:09:31,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:31,942 INFO L225 Difference]: With dead ends: 52 [2021-05-06 03:09:31,942 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 03:09:31,943 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:09:31,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 03:09:31,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-06 03:09:31,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:09:31,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-06 03:09:31,948 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-06 03:09:31,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:31,948 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-06 03:09:31,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:09:31,949 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-06 03:09:31,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:09:31,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:31,949 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:31,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 03:09:31,949 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:31,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:31,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2021-05-06 03:09:31,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:31,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273778667] [2021-05-06 03:09:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:31,958 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:31,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101359283] [2021-05-06 03:09:31,958 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 [2021-05-06 03:09:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:31,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:09:32,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:32,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 03:09:32,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:32,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273778667] [2021-05-06 03:09:32,058 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:32,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101359283] [2021-05-06 03:09:32,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101359283] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:32,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:32,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:09:32,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675752693] [2021-05-06 03:09:32,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:09:32,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:32,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:09:32,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:09:32,059 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:09:32,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:32,099 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2021-05-06 03:09:32,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:09:32,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 03:09:32,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:32,100 INFO L225 Difference]: With dead ends: 71 [2021-05-06 03:09:32,100 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 03:09:32,101 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:32,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 03:09:32,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 03:09:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:09:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-05-06 03:09:32,107 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2021-05-06 03:09:32,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:32,107 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-05-06 03:09:32,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:09:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-05-06 03:09:32,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 03:09:32,108 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:32,108 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2021-05-06 03:09:32,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:32,324 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:32,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:32,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2021-05-06 03:09:32,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:32,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144422727] [2021-05-06 03:09:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:32,332 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:32,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895295905] [2021-05-06 03:09:32,332 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 [2021-05-06 03:09:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:32,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:09:32,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:32,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:32,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:32,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:32,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:32,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:32,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:32,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:32,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:09:32,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:32,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144422727] [2021-05-06 03:09:32,459 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:32,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895295905] [2021-05-06 03:09:32,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895295905] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:32,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:32,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:09:32,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826122999] [2021-05-06 03:09:32,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:09:32,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:32,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:09:32,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:09:32,461 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:09:32,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:32,484 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-05-06 03:09:32,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:09:32,485 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), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 03:09:32,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:32,486 INFO L225 Difference]: With dead ends: 76 [2021-05-06 03:09:32,486 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 03:09:32,486 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:09:32,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 03:09:32,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-06 03:09:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:09:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-06 03:09:32,492 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-06 03:09:32,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:32,492 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-06 03:09:32,492 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), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:09:32,492 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-06 03:09:32,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 03:09:32,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:32,493 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2021-05-06 03:09:32,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:32,711 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:32,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:32,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2021-05-06 03:09:32,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:32,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172987731] [2021-05-06 03:09:32,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:32,726 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:32,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375897873] [2021-05-06 03:09:32,726 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 [2021-05-06 03:09:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:32,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:09:32,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:32,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:32,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:32,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:32,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:32,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:32,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:32,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:32,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:32,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:32,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:09:32,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:32,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172987731] [2021-05-06 03:09:32,889 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:32,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375897873] [2021-05-06 03:09:32,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375897873] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:32,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:32,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:09:32,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014539741] [2021-05-06 03:09:32,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:09:32,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:32,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:09:32,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:32,890 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:09:32,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:32,946 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-05-06 03:09:32,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:09:32,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 03:09:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:32,947 INFO L225 Difference]: With dead ends: 74 [2021-05-06 03:09:32,947 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 03:09:32,947 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:09:32,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 03:09:32,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 03:09:32,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 03:09:32,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-06 03:09:32,952 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-06 03:09:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:32,952 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-06 03:09:32,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:09:32,952 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-06 03:09:32,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 03:09:32,953 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:32,953 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:33,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:33,170 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:33,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:33,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 1 times [2021-05-06 03:09:33,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:33,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251455838] [2021-05-06 03:09:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:33,177 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:33,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739313838] [2021-05-06 03:09:33,177 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 [2021-05-06 03:09:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:33,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:09:33,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:33,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:09:33,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:33,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251455838] [2021-05-06 03:09:33,282 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:33,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739313838] [2021-05-06 03:09:33,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739313838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:33,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:33,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 03:09:33,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108214528] [2021-05-06 03:09:33,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:09:33,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:33,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:09:33,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:09:33,283 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:09:33,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:33,311 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2021-05-06 03:09:33,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:09:33,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-06 03:09:33,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:33,312 INFO L225 Difference]: With dead ends: 74 [2021-05-06 03:09:33,312 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 03:09:33,312 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:33,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 03:09:33,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 03:09:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 03:09:33,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-06 03:09:33,317 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-06 03:09:33,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:33,317 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-06 03:09:33,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:09:33,317 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-06 03:09:33,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 03:09:33,318 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:33,318 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:33,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:33,534 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:33,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:33,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 1 times [2021-05-06 03:09:33,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:33,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459591517] [2021-05-06 03:09:33,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:33,541 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:33,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027070795] [2021-05-06 03:09:33,541 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 [2021-05-06 03:09:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:33,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 03:09:33,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:33,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 03:09:33,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:33,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459591517] [2021-05-06 03:09:33,709 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:33,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027070795] [2021-05-06 03:09:33,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027070795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:33,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:33,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:09:33,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499159803] [2021-05-06 03:09:33,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:09:33,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:33,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:09:33,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:09:33,710 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:09:33,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:33,858 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2021-05-06 03:09:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:09:33,858 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 03:09:33,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:33,859 INFO L225 Difference]: With dead ends: 97 [2021-05-06 03:09:33,859 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 03:09:33,860 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:09:33,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 03:09:33,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-05-06 03:09:33,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 03:09:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2021-05-06 03:09:33,868 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 46 [2021-05-06 03:09:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:33,869 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2021-05-06 03:09:33,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:09:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2021-05-06 03:09:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 03:09:33,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:33,870 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-06 03:09:34,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:34,085 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:34,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:34,085 INFO L82 PathProgramCache]: Analyzing trace with hash 243046571, now seen corresponding path program 1 times [2021-05-06 03:09:34,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:34,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985301404] [2021-05-06 03:09:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:34,092 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:34,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634854659] [2021-05-06 03:09:34,093 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 [2021-05-06 03:09:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:34,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:09:34,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:34,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 03:09:34,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:34,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985301404] [2021-05-06 03:09:34,249 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:34,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634854659] [2021-05-06 03:09:34,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634854659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:34,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:34,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 03:09:34,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761326792] [2021-05-06 03:09:34,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:09:34,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:34,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:09:34,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:34,250 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 03:09:34,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:34,285 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2021-05-06 03:09:34,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:09:34,285 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), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2021-05-06 03:09:34,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:34,286 INFO L225 Difference]: With dead ends: 101 [2021-05-06 03:09:34,286 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 03:09:34,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:34,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 03:09:34,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-06 03:09:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 60 states have internal predecessors, (67), 21 states have call successors, (21), 13 states have call predecessors, (21), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 03:09:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2021-05-06 03:09:34,293 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 54 [2021-05-06 03:09:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:34,293 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2021-05-06 03:09:34,293 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), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 03:09:34,293 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2021-05-06 03:09:34,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 03:09:34,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:34,294 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-06 03:09:34,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 03:09:34,511 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:34,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:34,511 INFO L82 PathProgramCache]: Analyzing trace with hash 244774449, now seen corresponding path program 1 times [2021-05-06 03:09:34,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:34,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003012355] [2021-05-06 03:09:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:34,518 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:34,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126369370] [2021-05-06 03:09:34,518 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 [2021-05-06 03:09:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:34,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 03:09:34,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:34,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 03:09:34,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:34,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003012355] [2021-05-06 03:09:34,782 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:34,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126369370] [2021-05-06 03:09:34,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126369370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:34,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:34,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:09:34,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109870773] [2021-05-06 03:09:34,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:09:34,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:34,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:09:34,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:09:34,783 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 03:09:34,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:34,917 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2021-05-06 03:09:34,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:09:34,917 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-05-06 03:09:34,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:34,918 INFO L225 Difference]: With dead ends: 104 [2021-05-06 03:09:34,918 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 03:09:34,918 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:09:34,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 03:09:34,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-06 03:09:34,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 63 states have internal predecessors, (69), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 03:09:34,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2021-05-06 03:09:34,925 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 54 [2021-05-06 03:09:34,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:34,925 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2021-05-06 03:09:34,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 03:09:34,925 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2021-05-06 03:09:34,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 03:09:34,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:34,926 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-06 03:09:35,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 03:09:35,129 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:35,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:35,130 INFO L82 PathProgramCache]: Analyzing trace with hash -318333104, now seen corresponding path program 2 times [2021-05-06 03:09:35,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:35,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58191872] [2021-05-06 03:09:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:35,136 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:35,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920311339] [2021-05-06 03:09:35,136 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 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 [2021-05-06 03:09:35,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-05-06 03:09:35,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:35,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:09:35,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:35,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-06 03:09:35,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:35,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58191872] [2021-05-06 03:09:35,322 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:35,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920311339] [2021-05-06 03:09:35,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920311339] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:35,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:35,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:09:35,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996846071] [2021-05-06 03:09:35,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:09:35,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:35,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:09:35,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:09:35,323 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:09:35,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:35,365 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2021-05-06 03:09:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:09:35,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2021-05-06 03:09:35,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:35,366 INFO L225 Difference]: With dead ends: 110 [2021-05-06 03:09:35,366 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 03:09:35,367 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 03:09:35,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-06 03:09:35,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 68 states have (on average 1.161764705882353) internal successors, (79), 71 states have internal predecessors, (79), 24 states have call successors, (24), 15 states have call predecessors, (24), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 03:09:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2021-05-06 03:09:35,373 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 56 [2021-05-06 03:09:35,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:35,374 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2021-05-06 03:09:35,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:09:35,374 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2021-05-06 03:09:35,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 03:09:35,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:35,374 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:35,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:35,591 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:35,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:35,592 INFO L82 PathProgramCache]: Analyzing trace with hash 940283669, now seen corresponding path program 1 times [2021-05-06 03:09:35,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:35,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67122958] [2021-05-06 03:09:35,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:35,599 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:35,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928867971] [2021-05-06 03:09:35,599 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 [2021-05-06 03:09:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:35,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:09:35,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:35,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:35,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:35,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:35,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:35,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:35,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:35,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:35,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:35,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:35,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:35,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-06 03:09:35,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:35,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67122958] [2021-05-06 03:09:35,779 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:35,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928867971] [2021-05-06 03:09:35,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928867971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:35,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:35,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 03:09:35,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980227627] [2021-05-06 03:09:35,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:09:35,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:35,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:09:35,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:35,780 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 03:09:35,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:35,847 INFO L93 Difference]: Finished difference Result 134 states and 162 transitions. [2021-05-06 03:09:35,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:09:35,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2021-05-06 03:09:35,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:35,849 INFO L225 Difference]: With dead ends: 134 [2021-05-06 03:09:35,849 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 03:09:35,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:09:35,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 03:09:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-06 03:09:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 73 states have internal predecessors, (81), 24 states have call successors, (24), 15 states have call predecessors, (24), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 03:09:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2021-05-06 03:09:35,856 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 61 [2021-05-06 03:09:35,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:35,856 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2021-05-06 03:09:35,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 03:09:35,856 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2021-05-06 03:09:35,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 03:09:35,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:35,857 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:36,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:36,076 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:36,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:36,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1995039641, now seen corresponding path program 2 times [2021-05-06 03:09:36,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:36,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504212773] [2021-05-06 03:09:36,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:36,083 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:36,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510784557] [2021-05-06 03:09:36,083 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 [2021-05-06 03:09:36,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:09:36,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:36,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 03:09:36,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:36,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 03:09:36,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:36,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504212773] [2021-05-06 03:09:36,347 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:36,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510784557] [2021-05-06 03:09:36,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510784557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:36,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:36,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:09:36,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161839370] [2021-05-06 03:09:36,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:09:36,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:36,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:09:36,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:09:36,349 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:09:36,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:36,477 INFO L93 Difference]: Finished difference Result 178 states and 237 transitions. [2021-05-06 03:09:36,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:09:36,477 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2021-05-06 03:09:36,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:36,478 INFO L225 Difference]: With dead ends: 178 [2021-05-06 03:09:36,478 INFO L226 Difference]: Without dead ends: 146 [2021-05-06 03:09:36,479 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:09:36,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-06 03:09:36,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2021-05-06 03:09:36,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 92 states have internal predecessors, (106), 35 states have call successors, (35), 16 states have call predecessors, (35), 15 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:09:36,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 173 transitions. [2021-05-06 03:09:36,486 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 173 transitions. Word has length 64 [2021-05-06 03:09:36,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:36,486 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 173 transitions. [2021-05-06 03:09:36,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:09:36,486 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 173 transitions. [2021-05-06 03:09:36,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 03:09:36,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:36,487 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2021-05-06 03:09:36,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 03:09:36,703 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:36,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:36,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1140868055, now seen corresponding path program 1 times [2021-05-06 03:09:36,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:36,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696116730] [2021-05-06 03:09:36,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:36,710 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:36,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497615901] [2021-05-06 03:09:36,711 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 [2021-05-06 03:09:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:36,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 03:09:36,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:36,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:36,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:36,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:36,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:36,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:36,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:36,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:36,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:36,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:36,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:36,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:36,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:36,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:36,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 03:09:36,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:36,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696116730] [2021-05-06 03:09:36,888 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:36,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497615901] [2021-05-06 03:09:36,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497615901] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:36,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:36,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:09:36,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25635371] [2021-05-06 03:09:36,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:09:36,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:36,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:09:36,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:09:36,889 INFO L87 Difference]: Start difference. First operand 139 states and 173 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 03:09:36,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:36,958 INFO L93 Difference]: Finished difference Result 169 states and 198 transitions. [2021-05-06 03:09:36,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:09:36,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2021-05-06 03:09:36,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:36,960 INFO L225 Difference]: With dead ends: 169 [2021-05-06 03:09:36,960 INFO L226 Difference]: Without dead ends: 156 [2021-05-06 03:09:36,960 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:09:36,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-06 03:09:36,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-05-06 03:09:36,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 100 states have (on average 1.16) internal successors, (116), 104 states have internal predecessors, (116), 35 states have call successors, (35), 20 states have call predecessors, (35), 19 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:09:36,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 183 transitions. [2021-05-06 03:09:36,970 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 183 transitions. Word has length 68 [2021-05-06 03:09:36,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:36,970 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 183 transitions. [2021-05-06 03:09:36,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 03:09:36,970 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 183 transitions. [2021-05-06 03:09:36,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 03:09:36,971 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:36,971 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2021-05-06 03:09:37,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 03:09:37,196 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:37,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1142595933, now seen corresponding path program 1 times [2021-05-06 03:09:37,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:37,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177921998] [2021-05-06 03:09:37,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:37,202 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:37,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338957094] [2021-05-06 03:09:37,202 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 [2021-05-06 03:09:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:37,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 03:09:37,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:37,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:37,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:37,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:37,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:37,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:37,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:37,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:37,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:37,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:37,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:37,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:37,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:37,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:37,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:37,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:37,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:37,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:37,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:37,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 03:09:37,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:37,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177921998] [2021-05-06 03:09:37,656 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:37,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338957094] [2021-05-06 03:09:37,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338957094] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:37,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:37,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 03:09:37,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649098872] [2021-05-06 03:09:37,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 03:09:37,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:37,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 03:09:37,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:09:37,657 INFO L87 Difference]: Start difference. First operand 155 states and 183 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:09:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:37,878 INFO L93 Difference]: Finished difference Result 163 states and 190 transitions. [2021-05-06 03:09:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 03:09:37,879 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2021-05-06 03:09:37,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:37,880 INFO L225 Difference]: With dead ends: 163 [2021-05-06 03:09:37,880 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 03:09:37,880 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 143.7ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 03:09:37,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 03:09:37,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-05-06 03:09:37,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 103 states have (on average 1.1553398058252426) internal successors, (119), 107 states have internal predecessors, (119), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:09:37,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 186 transitions. [2021-05-06 03:09:37,891 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 186 transitions. Word has length 68 [2021-05-06 03:09:37,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:37,892 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 186 transitions. [2021-05-06 03:09:37,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:09:37,893 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 186 transitions. [2021-05-06 03:09:37,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 03:09:37,894 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:37,894 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 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] [2021-05-06 03:09:38,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 03:09:38,112 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:38,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:38,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1792978632, now seen corresponding path program 1 times [2021-05-06 03:09:38,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:38,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549886243] [2021-05-06 03:09:38,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:38,120 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:38,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16984997] [2021-05-06 03:09:38,120 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 [2021-05-06 03:09:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:38,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 03:09:38,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:38,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-05-06 03:09:38,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:38,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549886243] [2021-05-06 03:09:38,380 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:38,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16984997] [2021-05-06 03:09:38,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16984997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:38,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:38,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:09:38,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38582149] [2021-05-06 03:09:38,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:09:38,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:38,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:09:38,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:09:38,382 INFO L87 Difference]: Start difference. First operand 159 states and 186 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 03:09:38,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:38,480 INFO L93 Difference]: Finished difference Result 182 states and 217 transitions. [2021-05-06 03:09:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:09:38,481 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 79 [2021-05-06 03:09:38,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:38,483 INFO L225 Difference]: With dead ends: 182 [2021-05-06 03:09:38,483 INFO L226 Difference]: Without dead ends: 151 [2021-05-06 03:09:38,483 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:09:38,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-06 03:09:38,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 146. [2021-05-06 03:09:38,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 98 states have internal predecessors, (111), 35 states have call successors, (35), 18 states have call predecessors, (35), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 03:09:38,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 177 transitions. [2021-05-06 03:09:38,491 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 177 transitions. Word has length 79 [2021-05-06 03:09:38,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:38,492 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 177 transitions. [2021-05-06 03:09:38,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 03:09:38,492 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 177 transitions. [2021-05-06 03:09:38,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 03:09:38,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:38,493 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:38,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:38,707 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:38,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:38,707 INFO L82 PathProgramCache]: Analyzing trace with hash 816704307, now seen corresponding path program 2 times [2021-05-06 03:09:38,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:38,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534788182] [2021-05-06 03:09:38,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:38,718 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:38,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774928956] [2021-05-06 03:09:38,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:38,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:09:38,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:38,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 03:09:38,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:38,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:38,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:38,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:38,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:38,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:38,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:38,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:38,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:38,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:38,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:38,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:38,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:38,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:38,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 03:09:38,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:38,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534788182] [2021-05-06 03:09:38,884 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:38,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774928956] [2021-05-06 03:09:38,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774928956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:38,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:38,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:09:38,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045054063] [2021-05-06 03:09:38,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:09:38,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:38,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:09:38,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:09:38,886 INFO L87 Difference]: Start difference. First operand 146 states and 177 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 03:09:38,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:38,948 INFO L93 Difference]: Finished difference Result 183 states and 229 transitions. [2021-05-06 03:09:38,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:09:38,948 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 79 [2021-05-06 03:09:38,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:38,949 INFO L225 Difference]: With dead ends: 183 [2021-05-06 03:09:38,949 INFO L226 Difference]: Without dead ends: 148 [2021-05-06 03:09:38,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:09:38,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-06 03:09:38,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-05-06 03:09:38,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 100 states have internal predecessors, (113), 35 states have call successors, (35), 18 states have call predecessors, (35), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 03:09:38,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 179 transitions. [2021-05-06 03:09:38,958 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 179 transitions. Word has length 79 [2021-05-06 03:09:38,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:38,958 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 179 transitions. [2021-05-06 03:09:38,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 03:09:38,958 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 179 transitions. [2021-05-06 03:09:38,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 03:09:38,958 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:38,958 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:39,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 03:09:39,177 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:39,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:39,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1229238971, now seen corresponding path program 3 times [2021-05-06 03:09:39,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:39,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921025512] [2021-05-06 03:09:39,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:39,182 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:39,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832171433] [2021-05-06 03:09:39,182 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 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 [2021-05-06 03:09:39,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 03:09:39,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:39,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 03:09:39,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:39,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:39,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:39,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 62 proven. 7 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-05-06 03:09:39,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:39,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921025512] [2021-05-06 03:09:39,512 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:39,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832171433] [2021-05-06 03:09:39,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832171433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:39,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:39,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:09:39,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542801061] [2021-05-06 03:09:39,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:09:39,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:39,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:09:39,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:09:39,514 INFO L87 Difference]: Start difference. First operand 148 states and 179 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 03:09:39,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:39,941 INFO L93 Difference]: Finished difference Result 188 states and 231 transitions. [2021-05-06 03:09:39,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:09:39,941 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2021-05-06 03:09:39,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:39,942 INFO L225 Difference]: With dead ends: 188 [2021-05-06 03:09:39,942 INFO L226 Difference]: Without dead ends: 176 [2021-05-06 03:09:39,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:09:39,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-06 03:09:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 170. [2021-05-06 03:09:39,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 109 states have (on average 1.201834862385321) internal successors, (131), 116 states have internal predecessors, (131), 41 states have call successors, (41), 20 states have call predecessors, (41), 19 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 03:09:39,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 209 transitions. [2021-05-06 03:09:39,951 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 209 transitions. Word has length 82 [2021-05-06 03:09:39,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:39,952 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 209 transitions. [2021-05-06 03:09:39,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 03:09:39,952 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 209 transitions. [2021-05-06 03:09:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 03:09:39,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:39,965 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:40,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:40,182 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:40,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:40,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1069895175, now seen corresponding path program 2 times [2021-05-06 03:09:40,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:40,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056680484] [2021-05-06 03:09:40,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:40,188 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:40,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800553065] [2021-05-06 03:09:40,188 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 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 [2021-05-06 03:09:40,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:09:40,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:40,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 03:09:40,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:40,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 03:09:40,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:40,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056680484] [2021-05-06 03:09:40,464 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:40,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800553065] [2021-05-06 03:09:40,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800553065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:40,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:40,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:09:40,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456333934] [2021-05-06 03:09:40,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:09:40,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:40,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:09:40,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:09:40,465 INFO L87 Difference]: Start difference. First operand 170 states and 209 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 03:09:40,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:40,585 INFO L93 Difference]: Finished difference Result 210 states and 249 transitions. [2021-05-06 03:09:40,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:09:40,586 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 86 [2021-05-06 03:09:40,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:40,587 INFO L225 Difference]: With dead ends: 210 [2021-05-06 03:09:40,587 INFO L226 Difference]: Without dead ends: 197 [2021-05-06 03:09:40,587 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:09:40,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-06 03:09:40,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2021-05-06 03:09:40,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 127 states have (on average 1.1653543307086613) internal successors, (148), 134 states have internal predecessors, (148), 44 states have call successors, (44), 25 states have call predecessors, (44), 24 states have return successors, (40), 36 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-06 03:09:40,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 232 transitions. [2021-05-06 03:09:40,598 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 232 transitions. Word has length 86 [2021-05-06 03:09:40,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:40,598 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 232 transitions. [2021-05-06 03:09:40,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 03:09:40,598 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 232 transitions. [2021-05-06 03:09:40,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 03:09:40,599 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:40,599 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 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] [2021-05-06 03:09:40,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:40,799 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:40,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:40,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1068167297, now seen corresponding path program 2 times [2021-05-06 03:09:40,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:40,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498473015] [2021-05-06 03:09:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:40,804 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:40,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874308831] [2021-05-06 03:09:40,804 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 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 [2021-05-06 03:09:40,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:09:40,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:40,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 03:09:40,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:40,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:40,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:41,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:41,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:41,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:41,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:41,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:41,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:41,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:41,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:41,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:41,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:41,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:41,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:41,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 36 proven. 37 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-06 03:09:41,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:41,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498473015] [2021-05-06 03:09:41,270 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:41,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874308831] [2021-05-06 03:09:41,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874308831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:41,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:41,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 03:09:41,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386384928] [2021-05-06 03:09:41,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 03:09:41,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:41,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 03:09:41,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-06 03:09:41,272 INFO L87 Difference]: Start difference. First operand 196 states and 232 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 03:09:41,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:41,886 INFO L93 Difference]: Finished difference Result 221 states and 257 transitions. [2021-05-06 03:09:41,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 03:09:41,887 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 86 [2021-05-06 03:09:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:41,887 INFO L225 Difference]: With dead ends: 221 [2021-05-06 03:09:41,887 INFO L226 Difference]: Without dead ends: 197 [2021-05-06 03:09:41,888 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-06 03:09:41,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-06 03:09:41,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2021-05-06 03:09:41,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 133 states have internal predecessors, (146), 42 states have call successors, (42), 26 states have call predecessors, (42), 25 states have return successors, (39), 34 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 03:09:41,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 227 transitions. [2021-05-06 03:09:41,896 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 227 transitions. Word has length 86 [2021-05-06 03:09:41,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:41,896 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 227 transitions. [2021-05-06 03:09:41,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 03:09:41,896 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 227 transitions. [2021-05-06 03:09:41,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 03:09:41,897 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:41,897 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:42,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 03:09:42,097 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:42,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:42,098 INFO L82 PathProgramCache]: Analyzing trace with hash 114996177, now seen corresponding path program 3 times [2021-05-06 03:09:42,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:42,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230581654] [2021-05-06 03:09:42,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:42,105 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:42,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268823121] [2021-05-06 03:09:42,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:42,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-06 03:09:42,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:42,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 03:09:42,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:42,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-05-06 03:09:42,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:42,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230581654] [2021-05-06 03:09:42,410 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:42,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268823121] [2021-05-06 03:09:42,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268823121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:42,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:42,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:09:42,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792751548] [2021-05-06 03:09:42,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:09:42,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:42,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:09:42,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:09:42,411 INFO L87 Difference]: Start difference. First operand 194 states and 227 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-06 03:09:42,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:42,528 INFO L93 Difference]: Finished difference Result 249 states and 306 transitions. [2021-05-06 03:09:42,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 03:09:42,528 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 97 [2021-05-06 03:09:42,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:42,530 INFO L225 Difference]: With dead ends: 249 [2021-05-06 03:09:42,530 INFO L226 Difference]: Without dead ends: 196 [2021-05-06 03:09:42,530 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:09:42,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-06 03:09:42,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-05-06 03:09:42,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 128 states have (on average 1.15625) internal successors, (148), 135 states have internal predecessors, (148), 42 states have call successors, (42), 26 states have call predecessors, (42), 25 states have return successors, (39), 34 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 03:09:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 229 transitions. [2021-05-06 03:09:42,542 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 229 transitions. Word has length 97 [2021-05-06 03:09:42,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:42,543 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 229 transitions. [2021-05-06 03:09:42,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-06 03:09:42,543 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 229 transitions. [2021-05-06 03:09:42,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 03:09:42,543 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:42,543 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:42,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:42,760 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:42,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:42,760 INFO L82 PathProgramCache]: Analyzing trace with hash -545719131, now seen corresponding path program 3 times [2021-05-06 03:09:42,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:42,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293059318] [2021-05-06 03:09:42,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:42,770 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:42,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [56474898] [2021-05-06 03:09:42,770 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 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 [2021-05-06 03:09:42,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 03:09:42,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:42,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 03:09:42,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:42,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:42,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:43,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:43,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:43,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:43,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:43,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:43,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:43,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:43,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:43,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:43,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:43,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:43,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:43,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:43,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:43,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:43,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:43,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 61 proven. 29 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-05-06 03:09:43,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:43,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293059318] [2021-05-06 03:09:43,288 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:43,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56474898] [2021-05-06 03:09:43,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56474898] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:43,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:43,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 03:09:43,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233661930] [2021-05-06 03:09:43,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 03:09:43,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:43,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 03:09:43,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-05-06 03:09:43,289 INFO L87 Difference]: Start difference. First operand 196 states and 229 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:09:44,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:44,100 INFO L93 Difference]: Finished difference Result 209 states and 241 transitions. [2021-05-06 03:09:44,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 03:09:44,101 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2021-05-06 03:09:44,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:44,101 INFO L225 Difference]: With dead ends: 209 [2021-05-06 03:09:44,101 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 03:09:44,102 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 314.9ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-06 03:09:44,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 03:09:44,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2021-05-06 03:09:44,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 122 states have (on average 1.139344262295082) internal successors, (139), 128 states have internal predecessors, (139), 39 states have call successors, (39), 25 states have call predecessors, (39), 24 states have return successors, (36), 32 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-06 03:09:44,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 214 transitions. [2021-05-06 03:09:44,110 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 214 transitions. Word has length 100 [2021-05-06 03:09:44,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:44,110 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 214 transitions. [2021-05-06 03:09:44,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:09:44,110 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 214 transitions. [2021-05-06 03:09:44,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 03:09:44,110 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:44,111 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 03:09:44,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 03:09:44,325 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:44,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:44,325 INFO L82 PathProgramCache]: Analyzing trace with hash -543991253, now seen corresponding path program 3 times [2021-05-06 03:09:44,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:44,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238810563] [2021-05-06 03:09:44,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:44,332 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:44,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458109700] [2021-05-06 03:09:44,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:45,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 03:09:45,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:45,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 03:09:45,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:45,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 03:09:45,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:45,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238810563] [2021-05-06 03:09:45,763 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:45,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458109700] [2021-05-06 03:09:45,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458109700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:45,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:45,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 03:09:45,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033913018] [2021-05-06 03:09:45,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 03:09:45,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:45,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 03:09:45,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 03:09:45,764 INFO L87 Difference]: Start difference. First operand 186 states and 214 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:09:46,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:46,068 INFO L93 Difference]: Finished difference Result 192 states and 219 transitions. [2021-05-06 03:09:46,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 03:09:46,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2021-05-06 03:09:46,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:46,069 INFO L225 Difference]: With dead ends: 192 [2021-05-06 03:09:46,069 INFO L226 Difference]: Without dead ends: 155 [2021-05-06 03:09:46,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 03:09:46,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-06 03:09:46,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-05-06 03:09:46,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 100 states have (on average 1.16) internal successors, (116), 105 states have internal predecessors, (116), 34 states have call successors, (34), 21 states have call predecessors, (34), 20 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:09:46,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 182 transitions. [2021-05-06 03:09:46,076 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 182 transitions. Word has length 100 [2021-05-06 03:09:46,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:46,076 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 182 transitions. [2021-05-06 03:09:46,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:09:46,077 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 182 transitions. [2021-05-06 03:09:46,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 03:09:46,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:46,080 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:46,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 03:09:46,287 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:46,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:46,287 INFO L82 PathProgramCache]: Analyzing trace with hash -392782949, now seen corresponding path program 4 times [2021-05-06 03:09:46,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:46,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922019026] [2021-05-06 03:09:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:46,299 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:46,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861645708] [2021-05-06 03:09:46,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:46,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 03:09:46,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:46,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 03:09:46,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:46,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 28 proven. 350 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 03:09:46,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:46,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922019026] [2021-05-06 03:09:46,565 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:46,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861645708] [2021-05-06 03:09:46,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861645708] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:46,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:46,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:09:46,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192410674] [2021-05-06 03:09:46,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:09:46,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:46,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:09:46,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:09:46,566 INFO L87 Difference]: Start difference. First operand 155 states and 182 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 8 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-06 03:09:46,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:46,653 INFO L93 Difference]: Finished difference Result 199 states and 232 transitions. [2021-05-06 03:09:46,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:09:46,653 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 8 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2021-05-06 03:09:46,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:46,654 INFO L225 Difference]: With dead ends: 199 [2021-05-06 03:09:46,654 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 03:09:46,655 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:09:46,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 03:09:46,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-05-06 03:09:46,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 121 states have (on average 1.1487603305785123) internal successors, (139), 126 states have internal predecessors, (139), 39 states have call successors, (39), 25 states have call predecessors, (39), 24 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 03:09:46,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 215 transitions. [2021-05-06 03:09:46,666 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 215 transitions. Word has length 104 [2021-05-06 03:09:46,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:46,666 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 215 transitions. [2021-05-06 03:09:46,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 8 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-06 03:09:46,667 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 215 transitions. [2021-05-06 03:09:46,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 03:09:46,667 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:46,667 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:46,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:46,885 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:46,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:46,885 INFO L82 PathProgramCache]: Analyzing trace with hash -391055071, now seen corresponding path program 4 times [2021-05-06 03:09:46,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:46,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219101371] [2021-05-06 03:09:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:46,892 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:46,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544634205] [2021-05-06 03:09:46,892 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 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 [2021-05-06 03:09:46,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 03:09:46,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:46,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 03:09:46,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:47,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-05-06 03:09:47,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:47,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219101371] [2021-05-06 03:09:47,428 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:47,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544634205] [2021-05-06 03:09:47,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544634205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:47,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:47,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 03:09:47,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062592419] [2021-05-06 03:09:47,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 03:09:47,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:47,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 03:09:47,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:09:47,429 INFO L87 Difference]: Start difference. First operand 185 states and 215 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 03:09:47,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:47,735 INFO L93 Difference]: Finished difference Result 246 states and 300 transitions. [2021-05-06 03:09:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 03:09:47,735 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2021-05-06 03:09:47,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:47,736 INFO L225 Difference]: With dead ends: 246 [2021-05-06 03:09:47,736 INFO L226 Difference]: Without dead ends: 203 [2021-05-06 03:09:47,737 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:09:47,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-06 03:09:47,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 200. [2021-05-06 03:09:47,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 135 states have internal predecessors, (151), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 03:09:47,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 235 transitions. [2021-05-06 03:09:47,749 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 235 transitions. Word has length 104 [2021-05-06 03:09:47,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:47,749 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 235 transitions. [2021-05-06 03:09:47,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 03:09:47,750 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 235 transitions. [2021-05-06 03:09:47,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 03:09:47,751 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:47,752 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:47,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 03:09:47,970 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:47,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:47,970 INFO L82 PathProgramCache]: Analyzing trace with hash 898486511, now seen corresponding path program 4 times [2021-05-06 03:09:47,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:47,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140105834] [2021-05-06 03:09:47,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:47,979 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:47,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013044197] [2021-05-06 03:09:47,979 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 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 [2021-05-06 03:09:48,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 03:09:48,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:48,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 03:09:48,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:48,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 90 proven. 430 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-05-06 03:09:48,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:48,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140105834] [2021-05-06 03:09:48,193 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:48,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013044197] [2021-05-06 03:09:48,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013044197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:48,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:48,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:09:48,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412443091] [2021-05-06 03:09:48,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:09:48,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:48,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:09:48,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:09:48,194 INFO L87 Difference]: Start difference. First operand 200 states and 235 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 03:09:48,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:48,293 INFO L93 Difference]: Finished difference Result 255 states and 314 transitions. [2021-05-06 03:09:48,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 03:09:48,293 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 115 [2021-05-06 03:09:48,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:48,294 INFO L225 Difference]: With dead ends: 255 [2021-05-06 03:09:48,294 INFO L226 Difference]: Without dead ends: 202 [2021-05-06 03:09:48,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-06 03:09:48,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-06 03:09:48,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-05-06 03:09:48,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 132 states have (on average 1.1590909090909092) internal successors, (153), 137 states have internal predecessors, (153), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 03:09:48,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 237 transitions. [2021-05-06 03:09:48,302 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 237 transitions. Word has length 115 [2021-05-06 03:09:48,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:48,302 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 237 transitions. [2021-05-06 03:09:48,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 03:09:48,303 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 237 transitions. [2021-05-06 03:09:48,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-06 03:09:48,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:48,303 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 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] [2021-05-06 03:09:48,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:48,520 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:48,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:48,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1562534599, now seen corresponding path program 5 times [2021-05-06 03:09:48,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:48,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920434630] [2021-05-06 03:09:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:48,526 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:48,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585598641] [2021-05-06 03:09:48,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:48,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 03:09:48,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:48,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 03:09:48,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:48,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 470 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-05-06 03:09:48,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:48,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920434630] [2021-05-06 03:09:48,820 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:48,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585598641] [2021-05-06 03:09:48,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585598641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:48,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:48,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:09:48,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772669961] [2021-05-06 03:09:48,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:09:48,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:48,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:09:48,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:09:48,821 INFO L87 Difference]: Start difference. First operand 202 states and 237 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (20), 9 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 03:09:48,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:48,965 INFO L93 Difference]: Finished difference Result 267 states and 309 transitions. [2021-05-06 03:09:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 03:09:48,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (20), 9 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 118 [2021-05-06 03:09:48,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:48,967 INFO L225 Difference]: With dead ends: 267 [2021-05-06 03:09:48,967 INFO L226 Difference]: Without dead ends: 252 [2021-05-06 03:09:48,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:09:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-06 03:09:48,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2021-05-06 03:09:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 166 states have (on average 1.144578313253012) internal successors, (190), 171 states have internal predecessors, (190), 50 states have call successors, (50), 34 states have call predecessors, (50), 32 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 03:09:48,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 287 transitions. [2021-05-06 03:09:48,977 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 287 transitions. Word has length 118 [2021-05-06 03:09:48,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:48,977 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 287 transitions. [2021-05-06 03:09:48,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (20), 9 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 03:09:48,977 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 287 transitions. [2021-05-06 03:09:48,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-06 03:09:48,978 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:48,978 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 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] [2021-05-06 03:09:49,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 03:09:49,197 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:49,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:49,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1564262477, now seen corresponding path program 5 times [2021-05-06 03:09:49,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:49,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971059169] [2021-05-06 03:09:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:49,202 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:49,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939518947] [2021-05-06 03:09:49,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-06 03:09:49,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 03:09:49,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:49,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 03:09:49,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:49,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 104 proven. 93 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-05-06 03:09:49,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:49,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971059169] [2021-05-06 03:09:49,801 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:49,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939518947] [2021-05-06 03:09:49,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939518947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:49,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:49,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 03:09:49,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231694890] [2021-05-06 03:09:49,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 03:09:49,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:49,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 03:09:49,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-05-06 03:09:49,802 INFO L87 Difference]: Start difference. First operand 249 states and 287 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 03:09:50,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:50,385 INFO L93 Difference]: Finished difference Result 280 states and 325 transitions. [2021-05-06 03:09:50,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 03:09:50,385 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 118 [2021-05-06 03:09:50,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:50,386 INFO L225 Difference]: With dead ends: 280 [2021-05-06 03:09:50,386 INFO L226 Difference]: Without dead ends: 264 [2021-05-06 03:09:50,387 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 288.9ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-06 03:09:50,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-06 03:09:50,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2021-05-06 03:09:50,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 175 states have (on average 1.1485714285714286) internal successors, (201), 180 states have internal predecessors, (201), 52 states have call successors, (52), 35 states have call predecessors, (52), 34 states have return successors, (50), 46 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 03:09:50,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 303 transitions. [2021-05-06 03:09:50,407 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 303 transitions. Word has length 118 [2021-05-06 03:09:50,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:50,407 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 303 transitions. [2021-05-06 03:09:50,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 03:09:50,407 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 303 transitions. [2021-05-06 03:09:50,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 03:09:50,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:50,408 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:50,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 03:09:50,625 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:50,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:50,626 INFO L82 PathProgramCache]: Analyzing trace with hash 152469059, now seen corresponding path program 6 times [2021-05-06 03:09:50,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:50,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686296136] [2021-05-06 03:09:50,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:50,631 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:50,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541252903] [2021-05-06 03:09:50,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-06 03:09:50,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 03:09:50,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:50,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 03:09:50,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:52,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:52,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:52,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 93 proven. 19 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-05-06 03:09:52,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:52,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686296136] [2021-05-06 03:09:52,318 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:52,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541252903] [2021-05-06 03:09:52,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541252903] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:52,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:52,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:09:52,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086447257] [2021-05-06 03:09:52,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:09:52,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:52,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:09:52,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:09:52,319 INFO L87 Difference]: Start difference. First operand 262 states and 303 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 03:09:57,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:57,021 INFO L93 Difference]: Finished difference Result 287 states and 331 transitions. [2021-05-06 03:09:57,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:09:57,021 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 122 [2021-05-06 03:09:57,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:57,022 INFO L225 Difference]: With dead ends: 287 [2021-05-06 03:09:57,022 INFO L226 Difference]: Without dead ends: 285 [2021-05-06 03:09:57,023 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1432.2ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:09:57,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-05-06 03:09:57,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 268. [2021-05-06 03:09:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 179 states have (on average 1.1340782122905029) internal successors, (203), 186 states have internal predecessors, (203), 52 states have call successors, (52), 37 states have call predecessors, (52), 36 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 03:09:57,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 305 transitions. [2021-05-06 03:09:57,034 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 305 transitions. Word has length 122 [2021-05-06 03:09:57,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:57,034 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 305 transitions. [2021-05-06 03:09:57,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 03:09:57,034 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 305 transitions. [2021-05-06 03:09:57,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-06 03:09:57,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:57,035 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:57,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:57,252 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:57,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:57,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1003922248, now seen corresponding path program 7 times [2021-05-06 03:09:57,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:57,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470331677] [2021-05-06 03:09:57,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:57,257 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:57,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130288907] [2021-05-06 03:09:57,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-06 03:09:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:57,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 03:09:57,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:57,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 39 proven. 93 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-06 03:09:57,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:57,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470331677] [2021-05-06 03:09:57,693 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:57,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130288907] [2021-05-06 03:09:57,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130288907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:57,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:57,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 03:09:57,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360956632] [2021-05-06 03:09:57,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 03:09:57,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:57,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 03:09:57,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 03:09:57,695 INFO L87 Difference]: Start difference. First operand 268 states and 305 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-06 03:09:58,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:58,119 INFO L93 Difference]: Finished difference Result 316 states and 369 transitions. [2021-05-06 03:09:58,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 03:09:58,119 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 123 [2021-05-06 03:09:58,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:58,120 INFO L225 Difference]: With dead ends: 316 [2021-05-06 03:09:58,120 INFO L226 Difference]: Without dead ends: 284 [2021-05-06 03:09:58,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 187.5ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-06 03:09:58,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-06 03:09:58,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 281. [2021-05-06 03:09:58,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 187 states have (on average 1.1283422459893049) internal successors, (211), 196 states have internal predecessors, (211), 55 states have call successors, (55), 39 states have call predecessors, (55), 38 states have return successors, (52), 45 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-06 03:09:58,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 318 transitions. [2021-05-06 03:09:58,133 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 318 transitions. Word has length 123 [2021-05-06 03:09:58,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:58,133 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 318 transitions. [2021-05-06 03:09:58,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-06 03:09:58,133 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 318 transitions. [2021-05-06 03:09:58,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 03:09:58,134 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:58,134 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:58,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:58,351 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:58,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:58,352 INFO L82 PathProgramCache]: Analyzing trace with hash -2084819725, now seen corresponding path program 6 times [2021-05-06 03:09:58,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:58,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986826995] [2021-05-06 03:09:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:58,357 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:58,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301606831] [2021-05-06 03:09:58,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-06 03:09:59,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-06 03:09:59,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:59,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 03:09:59,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:59,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 36 proven. 612 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 03:09:59,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:59,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986826995] [2021-05-06 03:09:59,336 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:59,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301606831] [2021-05-06 03:09:59,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301606831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:59,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:59,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 03:09:59,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477694644] [2021-05-06 03:09:59,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 03:09:59,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:59,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 03:09:59,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:09:59,337 INFO L87 Difference]: Start difference. First operand 281 states and 318 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 10 states have call successors, (22), 10 states have call predecessors, (22), 8 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2021-05-06 03:09:59,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:59,490 INFO L93 Difference]: Finished difference Result 369 states and 422 transitions. [2021-05-06 03:09:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 03:09:59,490 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 10 states have call successors, (22), 10 states have call predecessors, (22), 8 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) Word has length 132 [2021-05-06 03:09:59,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:59,492 INFO L225 Difference]: With dead ends: 369 [2021-05-06 03:09:59,492 INFO L226 Difference]: Without dead ends: 353 [2021-05-06 03:09:59,492 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-05-06 03:09:59,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-06 03:09:59,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 338. [2021-05-06 03:09:59,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 228 states have (on average 1.1271929824561404) internal successors, (257), 237 states have internal predecessors, (257), 65 states have call successors, (65), 46 states have call predecessors, (65), 44 states have return successors, (61), 54 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-06 03:09:59,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 383 transitions. [2021-05-06 03:09:59,525 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 383 transitions. Word has length 132 [2021-05-06 03:09:59,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:59,525 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 383 transitions. [2021-05-06 03:09:59,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 10 states have call successors, (22), 10 states have call predecessors, (22), 8 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2021-05-06 03:09:59,525 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 383 transitions. [2021-05-06 03:09:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 03:09:59,526 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:59,526 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:59,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 03:09:59,732 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:59,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:59,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2083091847, now seen corresponding path program 8 times [2021-05-06 03:09:59,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:59,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040472013] [2021-05-06 03:09:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:59,737 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:59,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82412520] [2021-05-06 03:09:59,737 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 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 [2021-05-06 03:09:59,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:09:59,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:59,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-06 03:09:59,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:59,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:59,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 63 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-05-06 03:10:00,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:10:00,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040472013] [2021-05-06 03:10:00,444 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:10:00,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82412520] [2021-05-06 03:10:00,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82412520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:10:00,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:10:00,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 03:10:00,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459178444] [2021-05-06 03:10:00,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 03:10:00,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:10:00,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 03:10:00,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-06 03:10:00,445 INFO L87 Difference]: Start difference. First operand 338 states and 383 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-06 03:10:01,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:10:01,076 INFO L93 Difference]: Finished difference Result 370 states and 419 transitions. [2021-05-06 03:10:01,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 03:10:01,077 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) Word has length 132 [2021-05-06 03:10:01,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:10:01,078 INFO L225 Difference]: With dead ends: 370 [2021-05-06 03:10:01,078 INFO L226 Difference]: Without dead ends: 354 [2021-05-06 03:10:01,078 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 331.5ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-05-06 03:10:01,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-05-06 03:10:01,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 344. [2021-05-06 03:10:01,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 232 states have (on average 1.125) internal successors, (261), 241 states have internal predecessors, (261), 67 states have call successors, (67), 46 states have call predecessors, (67), 44 states have return successors, (63), 56 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 03:10:01,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 391 transitions. [2021-05-06 03:10:01,114 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 391 transitions. Word has length 132 [2021-05-06 03:10:01,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:10:01,114 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 391 transitions. [2021-05-06 03:10:01,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-06 03:10:01,114 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 391 transitions. [2021-05-06 03:10:01,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 03:10:01,115 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:10:01,115 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:10:01,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:10:01,329 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:10:01,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:10:01,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1660390021, now seen corresponding path program 1 times [2021-05-06 03:10:01,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:10:01,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723181190] [2021-05-06 03:10:01,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:10:01,335 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:10:01,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286630652] [2021-05-06 03:10:01,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 03:10:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:10:01,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-06 03:10:01,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:10:01,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:01,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:01,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:01,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:01,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:01,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:01,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:01,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:01,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:01,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:01,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:01,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:01,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:01,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:01,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:01,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:01,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:01,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:02,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:02,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:02,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 88 proven. 107 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-05-06 03:10:02,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:10:02,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723181190] [2021-05-06 03:10:02,122 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:10:02,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286630652] [2021-05-06 03:10:02,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286630652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:10:02,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:10:02,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 03:10:02,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480450384] [2021-05-06 03:10:02,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 03:10:02,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:10:02,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 03:10:02,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-05-06 03:10:02,124 INFO L87 Difference]: Start difference. First operand 344 states and 391 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-06 03:10:03,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:10:03,097 INFO L93 Difference]: Finished difference Result 375 states and 420 transitions. [2021-05-06 03:10:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 03:10:03,098 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 132 [2021-05-06 03:10:03,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:10:03,099 INFO L225 Difference]: With dead ends: 375 [2021-05-06 03:10:03,099 INFO L226 Difference]: Without dead ends: 359 [2021-05-06 03:10:03,100 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 439.5ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-06 03:10:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-06 03:10:03,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 335. [2021-05-06 03:10:03,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 226 states have (on average 1.1238938053097345) internal successors, (254), 234 states have internal predecessors, (254), 64 states have call successors, (64), 46 states have call predecessors, (64), 44 states have return successors, (60), 54 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-06 03:10:03,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 378 transitions. [2021-05-06 03:10:03,114 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 378 transitions. Word has length 132 [2021-05-06 03:10:03,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:10:03,114 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 378 transitions. [2021-05-06 03:10:03,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-06 03:10:03,114 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 378 transitions. [2021-05-06 03:10:03,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-06 03:10:03,115 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:10:03,115 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:10:03,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 03:10:03,337 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:10:03,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:10:03,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1446617583, now seen corresponding path program 9 times [2021-05-06 03:10:03,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:10:03,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497040787] [2021-05-06 03:10:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:10:03,343 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:10:03,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569896044] [2021-05-06 03:10:03,343 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 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 [2021-05-06 03:10:03,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 03:10:03,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:10:03,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 03:10:03,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:10:04,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:04,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:04,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:10:04,965 WARN L159 QuantifierPusher]: Ignoring assumption.