/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/ps4-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:52:55,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:52:55,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:52:55,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 16:52:55,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:52:55,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:52:55,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:52:55,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:52:55,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:52:55,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:52:55,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:52:55,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:52:55,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:52:55,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:52:55,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:52:55,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:52:55,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:52:55,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:52:55,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:52:55,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:52:55,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 16:52:55,375 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:52:55,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:52:55,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:52:55,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:52:55,377 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:52:55,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:52:55,378 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:52:55,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:52:55,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:52:55,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:52:55,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:52:55,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:52:55,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:52:55,391 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:52:55,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:52:55,391 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:52:55,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:52:55,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:52:55,391 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:52:55,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:52:55,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:52:55,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:52:55,392 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:52:55,392 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:52:55,392 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:52:55,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:52:55,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:52:55,392 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:52:55,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:52:55,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:52:55,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:52:55,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:52:55,666 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:52:55,667 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:52:55,667 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound100.c [2021-05-02 16:52:55,709 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62fc6a51f/d33fa20394cd45b9813cfe76822912f2/FLAG86011cb29 [2021-05-02 16:52:56,035 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:52:56,036 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound100.c [2021-05-02 16:52:56,040 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62fc6a51f/d33fa20394cd45b9813cfe76822912f2/FLAG86011cb29 [2021-05-02 16:52:56,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62fc6a51f/d33fa20394cd45b9813cfe76822912f2 [2021-05-02 16:52:56,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:52:56,454 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:52:56,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:52:56,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:52:56,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:52:56,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:52:56" (1/1) ... [2021-05-02 16:52:56,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d58a45d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:52:56, skipping insertion in model container [2021-05-02 16:52:56,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:52:56" (1/1) ... [2021-05-02 16:52:56,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:52:56,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:52:56,546 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/ps4-ll_unwindbound100.c[458,471] [2021-05-02 16:52:56,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:52:56,559 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:52:56,566 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/ps4-ll_unwindbound100.c[458,471] [2021-05-02 16:52:56,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:52:56,577 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:52:56,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:52:56 WrapperNode [2021-05-02 16:52:56,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:52:56,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:52:56,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:52:56,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:52:56,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:52:56" (1/1) ... [2021-05-02 16:52:56,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:52:56" (1/1) ... [2021-05-02 16:52:56,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:52:56" (1/1) ... [2021-05-02 16:52:56,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:52:56" (1/1) ... [2021-05-02 16:52:56,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:52:56" (1/1) ... [2021-05-02 16:52:56,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:52:56" (1/1) ... [2021-05-02 16:52:56,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:52:56" (1/1) ... [2021-05-02 16:52:56,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:52:56,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:52:56,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:52:56,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:52:56,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:52:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:52:56,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:52:56,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:52:56,702 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:52:56,702 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:52:56,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:52:56,703 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:52:56,703 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:52:56,703 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:52:56,703 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:52:56,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:52:56,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 16:52:56,704 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:52:56,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:52:56,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:52:56,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:52:56,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:52:56,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:52:56,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:52:56,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:52:56,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:52:56,943 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:52:56,943 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:52:56,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:52:56 BoogieIcfgContainer [2021-05-02 16:52:56,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:52:56,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:52:56,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:52:56,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:52:56,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:52:56" (1/3) ... [2021-05-02 16:52:56,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7128f419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:52:56, skipping insertion in model container [2021-05-02 16:52:56,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:52:56" (2/3) ... [2021-05-02 16:52:56,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7128f419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:52:56, skipping insertion in model container [2021-05-02 16:52:56,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:52:56" (3/3) ... [2021-05-02 16:52:56,949 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound100.c [2021-05-02 16:52:56,952 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:52:56,961 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:52:56,971 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:52:56,991 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:52:56,991 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:52:56,991 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:52:56,991 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:52:56,991 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:52:56,992 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:52:56,992 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:52:56,992 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:52:57,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:52:57,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 16:52:57,006 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:52:57,007 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:52:57,007 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:52:57,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:52:57,010 INFO L82 PathProgramCache]: Analyzing trace with hash -2133548928, now seen corresponding path program 1 times [2021-05-02 16:52:57,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:52:57,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631717720] [2021-05-02 16:52:57,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:52:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:52:57,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:52:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:52:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:52:57,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:52:57,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631717720] [2021-05-02 16:52:57,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631717720] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:52:57,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:52:57,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:52:57,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654772737] [2021-05-02 16:52:57,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:52:57,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:52:57,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:52:57,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:52:57,156 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 16:52:57,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:52:57,203 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-05-02 16:52:57,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:52:57,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 16:52:57,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:52:57,208 INFO L225 Difference]: With dead ends: 41 [2021-05-02 16:52:57,208 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 16:52:57,210 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:52:57,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 16:52:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-02 16:52:57,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:52:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-05-02 16:52:57,232 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-05-02 16:52:57,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:52:57,232 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-05-02 16:52:57,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 16:52:57,232 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-05-02 16:52:57,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 16:52:57,233 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:52:57,233 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:52:57,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:52:57,233 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:52:57,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:52:57,234 INFO L82 PathProgramCache]: Analyzing trace with hash -2118701623, now seen corresponding path program 1 times [2021-05-02 16:52:57,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:52:57,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101898997] [2021-05-02 16:52:57,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:52:57,244 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:52:57,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884516448] [2021-05-02 16:52:57,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:52:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:52:57,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 16:52:57,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:52:57,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:52:57,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:52:57,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:52:57,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:52:57,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:52:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:52:57,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:52:57,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101898997] [2021-05-02 16:52:57,441 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:52:57,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884516448] [2021-05-02 16:52:57,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884516448] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:52:57,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:52:57,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 16:52:57,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135651939] [2021-05-02 16:52:57,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 16:52:57,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:52:57,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 16:52:57,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:52:57,445 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 16:52:57,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:52:57,461 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-02 16:52:57,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 16:52:57,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 16:52:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:52:57,463 INFO L225 Difference]: With dead ends: 28 [2021-05-02 16:52:57,463 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 16:52:57,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:52:57,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 16:52:57,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-02 16:52:57,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:52:57,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-02 16:52:57,474 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-02 16:52:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:52:57,476 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-02 16:52:57,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 16:52:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-02 16:52:57,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 16:52:57,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:52:57,477 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:52:57,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:52:57,685 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:52:57,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:52:57,685 INFO L82 PathProgramCache]: Analyzing trace with hash -2116914163, now seen corresponding path program 1 times [2021-05-02 16:52:57,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:52:57,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627853469] [2021-05-02 16:52:57,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:52:57,693 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:52:57,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474835757] [2021-05-02 16:52:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:52:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:52:57,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 16:52:57,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:52:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:52:57,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:52:57,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627853469] [2021-05-02 16:52:57,768 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:52:57,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474835757] [2021-05-02 16:52:57,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474835757] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:52:57,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:52:57,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 16:52:57,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156404871] [2021-05-02 16:52:57,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:52:57,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:52:57,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:52:57,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:52:57,769 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 16:52:57,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:52:57,815 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-05-02 16:52:57,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 16:52:57,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 16:52:57,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:52:57,816 INFO L225 Difference]: With dead ends: 30 [2021-05-02 16:52:57,816 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 16:52:57,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:52:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 16:52:57,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 16:52:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:52:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 16:52:57,821 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2021-05-02 16:52:57,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:52:57,821 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 16:52:57,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 16:52:57,821 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 16:52:57,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 16:52:57,822 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:52:57,822 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:52:58,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:52:58,037 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:52:58,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:52:58,038 INFO L82 PathProgramCache]: Analyzing trace with hash -263585780, now seen corresponding path program 1 times [2021-05-02 16:52:58,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:52:58,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433192429] [2021-05-02 16:52:58,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:52:58,046 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:52:58,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533387335] [2021-05-02 16:52:58,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:52:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:52:58,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 16:52:58,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:52:58,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:52:58,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:52:58,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:52:58,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:52:58,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:52:58,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:52:58,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:52:58,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:52:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:52:58,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:52:58,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433192429] [2021-05-02 16:52:58,154 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:52:58,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533387335] [2021-05-02 16:52:58,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533387335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:52:58,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:52:58,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 16:52:58,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594729104] [2021-05-02 16:52:58,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:52:58,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:52:58,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:52:58,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:52:58,156 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:52:58,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:52:58,178 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-05-02 16:52:58,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 16:52:58,178 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 16:52:58,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:52:58,179 INFO L225 Difference]: With dead ends: 36 [2021-05-02 16:52:58,179 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 16:52:58,179 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:52:58,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 16:52:58,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 16:52:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:52:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-02 16:52:58,183 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2021-05-02 16:52:58,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:52:58,183 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-02 16:52:58,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:52:58,183 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-02 16:52:58,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 16:52:58,183 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:52:58,183 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:52:58,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:52:58,399 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:52:58,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:52:58,399 INFO L82 PathProgramCache]: Analyzing trace with hash -261798320, now seen corresponding path program 1 times [2021-05-02 16:52:58,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:52:58,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310317992] [2021-05-02 16:52:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:52:58,406 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:52:58,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934642956] [2021-05-02 16:52:58,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:52:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:52:58,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:52:58,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:52:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:52:58,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:52:58,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310317992] [2021-05-02 16:52:58,542 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:52:58,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934642956] [2021-05-02 16:52:58,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934642956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:52:58,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:52:58,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:52:58,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738269167] [2021-05-02 16:52:58,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:52:58,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:52:58,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:52:58,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:52:58,543 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:53:00,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:00,655 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-05-02 16:53:00,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:53:00,656 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 16:53:00,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:00,656 INFO L225 Difference]: With dead ends: 38 [2021-05-02 16:53:00,657 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 16:53:00,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:53:00,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 16:53:00,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 16:53:00,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:53:00,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 16:53:00,662 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2021-05-02 16:53:00,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:00,662 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 16:53:00,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:53:00,662 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 16:53:00,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 16:53:00,663 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:00,663 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:00,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:00,873 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:00,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:00,873 INFO L82 PathProgramCache]: Analyzing trace with hash 891414954, now seen corresponding path program 1 times [2021-05-02 16:53:00,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:00,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637530189] [2021-05-02 16:53:00,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:00,891 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:00,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780854305] [2021-05-02 16:53:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:53:00,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 16:53:00,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:00,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:53:01,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:01,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637530189] [2021-05-02 16:53:01,076 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:01,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780854305] [2021-05-02 16:53:01,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780854305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:01,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:01,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:53:01,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896246150] [2021-05-02 16:53:01,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:53:01,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:01,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:53:01,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:53:01,078 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:53:01,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:01,181 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-05-02 16:53:01,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:53:01,182 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-02 16:53:01,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:01,182 INFO L225 Difference]: With dead ends: 41 [2021-05-02 16:53:01,182 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 16:53:01,189 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:53:01,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 16:53:01,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 16:53:01,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:53:01,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 16:53:01,198 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-02 16:53:01,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:01,199 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 16:53:01,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:53:01,199 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 16:53:01,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:53:01,200 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:01,200 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:01,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 16:53:01,416 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:01,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:01,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1647059121, now seen corresponding path program 2 times [2021-05-02 16:53:01,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:01,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958812854] [2021-05-02 16:53:01,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:01,430 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:01,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41308547] [2021-05-02 16:53:01,431 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:01,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:53:01,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:01,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 16:53:01,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:01,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:01,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:01,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958812854] [2021-05-02 16:53:01,555 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:01,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41308547] [2021-05-02 16:53:01,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41308547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:01,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:01,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 16:53:01,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722384726] [2021-05-02 16:53:01,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 16:53:01,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:01,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 16:53:01,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:53:01,556 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:53:01,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:01,592 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-05-02 16:53:01,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:53:01,593 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 16:53:01,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:01,594 INFO L225 Difference]: With dead ends: 44 [2021-05-02 16:53:01,594 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 16:53:01,594 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:53:01,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 16:53:01,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 16:53:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:53:01,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-05-02 16:53:01,597 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2021-05-02 16:53:01,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:01,598 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-05-02 16:53:01,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:53:01,598 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-05-02 16:53:01,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:53:01,598 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:01,598 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:01,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:01,816 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:01,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:01,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1645271661, now seen corresponding path program 2 times [2021-05-02 16:53:01,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:01,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769350002] [2021-05-02 16:53:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:01,823 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:01,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145109659] [2021-05-02 16:53:01,823 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:01,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:53:01,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:01,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 16:53:01,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:01,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:01,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:53:02,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:02,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769350002] [2021-05-02 16:53:02,066 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:02,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145109659] [2021-05-02 16:53:02,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145109659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:02,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:02,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:53:02,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180662044] [2021-05-02 16:53:02,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:53:02,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:02,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:53:02,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:53:02,067 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:53:04,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:04,280 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-05-02 16:53:04,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:53:04,281 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 16:53:04,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:04,281 INFO L225 Difference]: With dead ends: 46 [2021-05-02 16:53:04,282 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 16:53:04,282 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:53:04,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 16:53:04,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 16:53:04,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:53:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-02 16:53:04,289 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2021-05-02 16:53:04,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:04,289 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-02 16:53:04,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:53:04,289 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-02 16:53:04,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 16:53:04,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:04,290 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:04,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:04,501 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:04,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:04,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1036651181, now seen corresponding path program 2 times [2021-05-02 16:53:04,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:04,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730414521] [2021-05-02 16:53:04,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:04,508 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:04,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276665209] [2021-05-02 16:53:04,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:04,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:53:04,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:04,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 16:53:04,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:04,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 16:53:04,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:04,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730414521] [2021-05-02 16:53:04,705 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:04,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276665209] [2021-05-02 16:53:04,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276665209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:04,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:04,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 16:53:04,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689156526] [2021-05-02 16:53:04,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 16:53:04,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:04,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 16:53:04,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:53:04,707 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:53:04,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:04,814 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-05-02 16:53:04,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 16:53:04,815 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-02 16:53:04,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:04,816 INFO L225 Difference]: With dead ends: 49 [2021-05-02 16:53:04,816 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 16:53:04,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:53:04,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 16:53:04,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 16:53:04,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:53:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-02 16:53:04,820 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-02 16:53:04,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:04,820 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-02 16:53:04,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:53:04,820 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-02 16:53:04,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 16:53:04,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:04,821 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:05,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 16:53:05,029 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash 486001554, now seen corresponding path program 3 times [2021-05-02 16:53:05,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:05,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869648540] [2021-05-02 16:53:05,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:05,060 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:05,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689984231] [2021-05-02 16:53:05,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:05,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 16:53:05,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:05,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 16:53:05,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:05,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:05,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:05,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869648540] [2021-05-02 16:53:05,240 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:05,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689984231] [2021-05-02 16:53:05,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689984231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:05,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:05,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 16:53:05,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972109936] [2021-05-02 16:53:05,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:53:05,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:05,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:53:05,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:53:05,243 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:53:05,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:05,302 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-02 16:53:05,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 16:53:05,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-05-02 16:53:05,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:05,303 INFO L225 Difference]: With dead ends: 52 [2021-05-02 16:53:05,303 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 16:53:05,303 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:53:05,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 16:53:05,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 16:53:05,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:53:05,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-02 16:53:05,309 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2021-05-02 16:53:05,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:05,309 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-02 16:53:05,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:53:05,309 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-02 16:53:05,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 16:53:05,309 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:05,309 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:05,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:05,513 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:05,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:05,513 INFO L82 PathProgramCache]: Analyzing trace with hash 487789014, now seen corresponding path program 3 times [2021-05-02 16:53:05,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:05,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445818849] [2021-05-02 16:53:05,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:05,518 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:05,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607194723] [2021-05-02 16:53:05,518 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:05,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 16:53:05,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:05,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 16:53:05,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:05,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 16:53:05,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:05,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445818849] [2021-05-02 16:53:05,683 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:05,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607194723] [2021-05-02 16:53:05,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607194723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:05,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:05,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 16:53:05,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531188007] [2021-05-02 16:53:05,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:53:05,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:05,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:53:05,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:53:05,684 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 16:53:05,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:05,735 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-05-02 16:53:05,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 16:53:05,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-05-02 16:53:05,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:05,736 INFO L225 Difference]: With dead ends: 50 [2021-05-02 16:53:05,736 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 16:53:05,737 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:53:05,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 16:53:05,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 16:53:05,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:53:05,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-02 16:53:05,741 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 36 [2021-05-02 16:53:05,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:05,741 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-02 16:53:05,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 16:53:05,741 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-02 16:53:05,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 16:53:05,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:05,742 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:05,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:05,942 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:05,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:05,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1383171920, now seen corresponding path program 3 times [2021-05-02 16:53:05,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:05,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725183631] [2021-05-02 16:53:05,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:05,948 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:05,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039464872] [2021-05-02 16:53:05,948 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:06,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 16:53:06,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:06,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 16:53:06,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:06,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 16:53:06,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:06,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725183631] [2021-05-02 16:53:06,377 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:06,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039464872] [2021-05-02 16:53:06,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039464872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:06,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:06,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:53:06,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534174246] [2021-05-02 16:53:06,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:53:06,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:06,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:53:06,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:53:06,378 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:53:06,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:06,449 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-05-02 16:53:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:53:06,450 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2021-05-02 16:53:06,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:06,450 INFO L225 Difference]: With dead ends: 52 [2021-05-02 16:53:06,450 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 16:53:06,451 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:53:06,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 16:53:06,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 16:53:06,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:53:06,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-05-02 16:53:06,455 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2021-05-02 16:53:06,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:06,455 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-05-02 16:53:06,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:53:06,456 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-05-02 16:53:06,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 16:53:06,456 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:06,456 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:06,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 16:53:06,660 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:06,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:06,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1386691371, now seen corresponding path program 4 times [2021-05-02 16:53:06,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:06,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732079538] [2021-05-02 16:53:06,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:06,677 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:06,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920739805] [2021-05-02 16:53:06,678 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:06,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:53:06,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:06,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 16:53:06,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:06,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:06,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:06,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732079538] [2021-05-02 16:53:06,821 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:06,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920739805] [2021-05-02 16:53:06,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920739805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:06,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:06,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:53:06,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515287463] [2021-05-02 16:53:06,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:53:06,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:06,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:53:06,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:53:06,822 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:53:06,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:06,907 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-05-02 16:53:06,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 16:53:06,907 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 44 [2021-05-02 16:53:06,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:06,908 INFO L225 Difference]: With dead ends: 58 [2021-05-02 16:53:06,908 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 16:53:06,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:53:06,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 16:53:06,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-02 16:53:06,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:53:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-02 16:53:06,918 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 44 [2021-05-02 16:53:06,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:06,918 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-02 16:53:06,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:53:06,918 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-02 16:53:06,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 16:53:06,920 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:06,920 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:07,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 16:53:07,136 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:07,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:07,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1037185971, now seen corresponding path program 4 times [2021-05-02 16:53:07,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:07,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034578590] [2021-05-02 16:53:07,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:07,141 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:07,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547538504] [2021-05-02 16:53:07,141 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:07,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:53:07,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:07,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 16:53:07,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:07,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 16:53:07,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:07,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034578590] [2021-05-02 16:53:07,389 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:07,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547538504] [2021-05-02 16:53:07,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547538504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:07,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:07,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:53:07,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200552480] [2021-05-02 16:53:07,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:53:07,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:07,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:53:07,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:53:07,390 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:53:07,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:07,514 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-05-02 16:53:07,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 16:53:07,514 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2021-05-02 16:53:07,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:07,515 INFO L225 Difference]: With dead ends: 60 [2021-05-02 16:53:07,515 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 16:53:07,516 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 16:53:07,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 16:53:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 16:53:07,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:53:07,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-05-02 16:53:07,520 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2021-05-02 16:53:07,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:07,520 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-05-02 16:53:07,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:53:07,520 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-05-02 16:53:07,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 16:53:07,521 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:07,521 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:07,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 16:53:07,730 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:07,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:07,730 INFO L82 PathProgramCache]: Analyzing trace with hash 999934744, now seen corresponding path program 5 times [2021-05-02 16:53:07,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:07,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030327332] [2021-05-02 16:53:07,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:07,737 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:07,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708443429] [2021-05-02 16:53:07,737 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:07,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 16:53:07,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:07,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 16:53:07,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:07,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:07,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:07,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030327332] [2021-05-02 16:53:07,934 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:07,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708443429] [2021-05-02 16:53:07,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708443429] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:07,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:07,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:53:07,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563410423] [2021-05-02 16:53:07,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:53:07,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:07,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:53:07,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:53:07,935 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:53:08,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:08,021 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-05-02 16:53:08,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 16:53:08,021 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2021-05-02 16:53:08,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:08,022 INFO L225 Difference]: With dead ends: 66 [2021-05-02 16:53:08,022 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 16:53:08,022 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:53:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 16:53:08,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-02 16:53:08,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:53:08,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-05-02 16:53:08,026 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 52 [2021-05-02 16:53:08,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:08,026 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-05-02 16:53:08,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:53:08,027 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-05-02 16:53:08,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 16:53:08,027 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:08,027 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:08,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:08,228 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:08,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:08,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1795671114, now seen corresponding path program 5 times [2021-05-02 16:53:08,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:08,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798550390] [2021-05-02 16:53:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:08,232 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:08,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854791066] [2021-05-02 16:53:08,233 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:08,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 16:53:08,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:08,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 16:53:08,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:08,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 14 proven. 73 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 16:53:08,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:08,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798550390] [2021-05-02 16:53:08,520 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:08,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854791066] [2021-05-02 16:53:08,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854791066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:08,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:08,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 16:53:08,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560510095] [2021-05-02 16:53:08,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 16:53:08,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:08,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 16:53:08,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:53:08,521 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:53:08,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:08,666 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-05-02 16:53:08,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 16:53:08,666 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 58 [2021-05-02 16:53:08,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:08,670 INFO L225 Difference]: With dead ends: 68 [2021-05-02 16:53:08,670 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 16:53:08,671 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:53:08,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 16:53:08,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-02 16:53:08,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:53:08,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-05-02 16:53:08,675 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2021-05-02 16:53:08,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:08,676 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-05-02 16:53:08,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:53:08,676 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-05-02 16:53:08,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 16:53:08,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:08,676 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:08,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:08,895 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:08,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:08,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1633541723, now seen corresponding path program 6 times [2021-05-02 16:53:08,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:08,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665992621] [2021-05-02 16:53:08,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:08,899 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:08,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315386612] [2021-05-02 16:53:08,899 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:09,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 16:53:09,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:09,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 16:53:09,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:09,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:09,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:09,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665992621] [2021-05-02 16:53:09,223 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:09,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315386612] [2021-05-02 16:53:09,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315386612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:09,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:09,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 16:53:09,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239301658] [2021-05-02 16:53:09,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 16:53:09,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:09,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 16:53:09,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:53:09,228 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:53:09,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:09,342 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-05-02 16:53:09,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 16:53:09,343 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 60 [2021-05-02 16:53:09,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:09,343 INFO L225 Difference]: With dead ends: 74 [2021-05-02 16:53:09,343 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 16:53:09,344 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:53:09,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 16:53:09,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-02 16:53:09,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:53:09,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-05-02 16:53:09,350 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2021-05-02 16:53:09,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:09,350 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-05-02 16:53:09,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:53:09,350 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-05-02 16:53:09,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 16:53:09,351 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:09,351 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:09,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:09,555 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:09,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:09,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1180930233, now seen corresponding path program 6 times [2021-05-02 16:53:09,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:09,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100627687] [2021-05-02 16:53:09,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:09,559 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:09,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925990280] [2021-05-02 16:53:09,560 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:09,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 16:53:09,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:09,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 16:53:09,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:09,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 22 proven. 94 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 16:53:09,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:09,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100627687] [2021-05-02 16:53:09,996 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:09,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925990280] [2021-05-02 16:53:09,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925990280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:09,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:09,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 16:53:09,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139983899] [2021-05-02 16:53:09,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 16:53:09,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:09,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 16:53:09,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:53:09,999 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:53:10,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:10,176 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-05-02 16:53:10,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 16:53:10,176 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 66 [2021-05-02 16:53:10,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:10,177 INFO L225 Difference]: With dead ends: 76 [2021-05-02 16:53:10,177 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 16:53:10,177 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-02 16:53:10,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 16:53:10,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-02 16:53:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:53:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-05-02 16:53:10,182 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2021-05-02 16:53:10,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:10,182 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-05-02 16:53:10,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:53:10,183 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-05-02 16:53:10,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 16:53:10,183 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:10,183 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:10,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 16:53:10,387 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:10,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:10,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1699217054, now seen corresponding path program 7 times [2021-05-02 16:53:10,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:10,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478851876] [2021-05-02 16:53:10,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:10,392 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:10,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535077728] [2021-05-02 16:53:10,393 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:53:10,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:53:10,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:10,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:10,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:10,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478851876] [2021-05-02 16:53:10,597 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:10,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535077728] [2021-05-02 16:53:10,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535077728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:10,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:10,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:53:10,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608426713] [2021-05-02 16:53:10,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:53:10,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:10,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:53:10,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:53:10,599 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:53:10,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:10,719 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-05-02 16:53:10,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 16:53:10,719 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 68 [2021-05-02 16:53:10,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:10,720 INFO L225 Difference]: With dead ends: 82 [2021-05-02 16:53:10,720 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 16:53:10,720 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:53:10,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 16:53:10,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-02 16:53:10,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:53:10,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-05-02 16:53:10,724 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 68 [2021-05-02 16:53:10,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:10,724 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-05-02 16:53:10,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:53:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-05-02 16:53:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 16:53:10,725 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:10,725 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:10,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 16:53:10,933 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:10,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:10,933 INFO L82 PathProgramCache]: Analyzing trace with hash -763940164, now seen corresponding path program 7 times [2021-05-02 16:53:10,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:10,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117881877] [2021-05-02 16:53:10,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:10,937 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:10,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932832853] [2021-05-02 16:53:10,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:53:11,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 16:53:11,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:11,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,082 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~c~0 0) (= c_main_~y~0 0) (= (mod (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0)) 4) 0)) is different from true [2021-05-02 16:53:46,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 127 refuted. 0 times theorem prover too weak. 91 trivial. 7 not checked. [2021-05-02 16:53:46,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:46,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117881877] [2021-05-02 16:53:46,294 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:46,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932832853] [2021-05-02 16:53:46,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932832853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:46,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:46,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 16:53:46,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965543761] [2021-05-02 16:53:46,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 16:53:46,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:46,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 16:53:46,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=183, Unknown=1, NotChecked=26, Total=240 [2021-05-02 16:53:46,295 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:53:46,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:46,471 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2021-05-02 16:53:46,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 16:53:46,471 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 74 [2021-05-02 16:53:46,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:46,472 INFO L225 Difference]: With dead ends: 84 [2021-05-02 16:53:46,472 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 16:53:46,472 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34767.1ms TimeCoverageRelationStatistics Valid=45, Invalid=264, Unknown=1, NotChecked=32, Total=342 [2021-05-02 16:53:46,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 16:53:46,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-02 16:53:46,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:53:46,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2021-05-02 16:53:46,476 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2021-05-02 16:53:46,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:46,476 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2021-05-02 16:53:46,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:53:46,476 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2021-05-02 16:53:46,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 16:53:46,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:46,477 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:46,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 16:53:46,681 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:46,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:46,681 INFO L82 PathProgramCache]: Analyzing trace with hash 989539297, now seen corresponding path program 8 times [2021-05-02 16:53:46,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:46,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420756522] [2021-05-02 16:53:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:46,686 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:46,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653674700] [2021-05-02 16:53:46,686 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:46,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:53:46,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:46,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 16:53:46,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:46,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:46,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:46,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420756522] [2021-05-02 16:53:46,901 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:46,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653674700] [2021-05-02 16:53:46,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653674700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:46,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:46,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:53:46,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667969411] [2021-05-02 16:53:46,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:53:46,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:46,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:53:46,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:53:46,902 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:53:47,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:47,032 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-05-02 16:53:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 16:53:47,032 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 76 [2021-05-02 16:53:47,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:47,033 INFO L225 Difference]: With dead ends: 90 [2021-05-02 16:53:47,033 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 16:53:47,033 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-02 16:53:47,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 16:53:47,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-02 16:53:47,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:53:47,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-05-02 16:53:47,037 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 76 [2021-05-02 16:53:47,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:47,037 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-05-02 16:53:47,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:53:47,037 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-05-02 16:53:47,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 16:53:47,038 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:47,038 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:47,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 16:53:47,247 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:47,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:47,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1500110401, now seen corresponding path program 8 times [2021-05-02 16:53:47,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:47,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962624245] [2021-05-02 16:53:47,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:47,251 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:47,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036791054] [2021-05-02 16:53:47,252 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:47,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:53:47,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:47,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 16:53:47,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:47,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:47,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:47,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:47,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:47,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:47,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:47,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:47,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:47,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 17 proven. 169 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-02 16:53:47,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:47,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962624245] [2021-05-02 16:53:47,901 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:47,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036791054] [2021-05-02 16:53:47,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036791054] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:47,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:47,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 16:53:47,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086231] [2021-05-02 16:53:47,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 16:53:47,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:47,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 16:53:47,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:53:47,902 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:53:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:48,119 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2021-05-02 16:53:48,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 16:53:48,120 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 82 [2021-05-02 16:53:48,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:48,120 INFO L225 Difference]: With dead ends: 92 [2021-05-02 16:53:48,121 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 16:53:48,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-02 16:53:48,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 16:53:48,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-02 16:53:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:53:48,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-05-02 16:53:48,125 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2021-05-02 16:53:48,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:48,125 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-05-02 16:53:48,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:53:48,125 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-05-02 16:53:48,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 16:53:48,125 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:48,126 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:48,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 16:53:48,329 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:48,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:48,329 INFO L82 PathProgramCache]: Analyzing trace with hash -2095421916, now seen corresponding path program 9 times [2021-05-02 16:53:48,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:48,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67636653] [2021-05-02 16:53:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:48,334 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:48,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580985499] [2021-05-02 16:53:48,334 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:48,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 16:53:48,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:48,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 16:53:48,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:48,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:48,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:48,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67636653] [2021-05-02 16:53:48,982 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:48,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580985499] [2021-05-02 16:53:48,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580985499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:48,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:48,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 16:53:48,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20357872] [2021-05-02 16:53:48,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 16:53:48,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:48,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 16:53:48,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:53:48,983 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:53:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:49,117 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2021-05-02 16:53:49,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 16:53:49,117 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 84 [2021-05-02 16:53:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:49,118 INFO L225 Difference]: With dead ends: 98 [2021-05-02 16:53:49,118 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 16:53:49,118 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-02 16:53:49,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 16:53:49,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-02 16:53:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:53:49,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-05-02 16:53:49,122 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 84 [2021-05-02 16:53:49,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:49,123 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-05-02 16:53:49,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:53:49,123 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-05-02 16:53:49,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 16:53:49,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:49,123 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:49,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:49,327 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:49,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:49,327 INFO L82 PathProgramCache]: Analyzing trace with hash 488857026, now seen corresponding path program 9 times [2021-05-02 16:53:49,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:49,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633332672] [2021-05-02 16:53:49,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:49,332 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:49,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025934833] [2021-05-02 16:53:49,332 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:49,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 16:53:49,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:49,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-02 16:53:49,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:49,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:49,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:50,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:50,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:50,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:50,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:50,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:50,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:50,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:50,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:50,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:50,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:50,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 59 proven. 204 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 16:53:50,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:50,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633332672] [2021-05-02 16:53:50,143 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:50,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025934833] [2021-05-02 16:53:50,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025934833] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:50,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:50,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 16:53:50,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773781635] [2021-05-02 16:53:50,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 16:53:50,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:50,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 16:53:50,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-05-02 16:53:50,144 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:53:52,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:52,802 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-05-02 16:53:52,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 16:53:52,803 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 90 [2021-05-02 16:53:52,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:52,803 INFO L225 Difference]: With dead ends: 100 [2021-05-02 16:53:52,804 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 16:53:52,804 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 270.3ms TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-05-02 16:53:52,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 16:53:52,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 16:53:52,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:53:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-05-02 16:53:52,808 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2021-05-02 16:53:52,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:52,809 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-05-02 16:53:52,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:53:52,809 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-05-02 16:53:52,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 16:53:52,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:52,809 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:53,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 16:53:53,014 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:53,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:53,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1958171289, now seen corresponding path program 10 times [2021-05-02 16:53:53,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:53,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967573372] [2021-05-02 16:53:53,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:53,028 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:53,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140912264] [2021-05-02 16:53:53,028 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 [2021-05-02 16:53:53,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:53:53,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:53,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 16:53:53,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:53,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:53,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:53,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967573372] [2021-05-02 16:53:53,985 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:53,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140912264] [2021-05-02 16:53:53,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140912264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:53,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:53,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 16:53:53,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704685728] [2021-05-02 16:53:53,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 16:53:53,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:53,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 16:53:53,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:53:53,986 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:53:54,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:54,187 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2021-05-02 16:53:54,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 16:53:54,188 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 92 [2021-05-02 16:53:54,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:54,188 INFO L225 Difference]: With dead ends: 106 [2021-05-02 16:53:54,189 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 16:53:54,189 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-02 16:53:54,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 16:53:54,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-02 16:53:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:53:54,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-05-02 16:53:54,193 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 92 [2021-05-02 16:53:54,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:54,193 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-05-02 16:53:54,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:53:54,194 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-05-02 16:53:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 16:53:54,194 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:54,194 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:54,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:54,400 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:54,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:54,400 INFO L82 PathProgramCache]: Analyzing trace with hash 2105665221, now seen corresponding path program 10 times [2021-05-02 16:53:54,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:54,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155019204] [2021-05-02 16:53:54,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:54,404 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:54,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223168887] [2021-05-02 16:53:54,405 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:54,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:53:54,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:54,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-02 16:53:54,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:54,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:55,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:55,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:55,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:55,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:55,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:55,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:55,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:55,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 21 proven. 251 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 16:53:55,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:55,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155019204] [2021-05-02 16:53:55,351 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:55,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223168887] [2021-05-02 16:53:55,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223168887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:55,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:55,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 16:53:55,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502054698] [2021-05-02 16:53:55,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 16:53:55,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:55,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 16:53:55,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:53:55,355 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 13 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:53:55,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:55,647 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-05-02 16:53:55,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 16:53:55,647 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 13 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 98 [2021-05-02 16:53:55,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:55,649 INFO L225 Difference]: With dead ends: 108 [2021-05-02 16:53:55,649 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 16:53:55,650 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 330.6ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-02 16:53:55,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 16:53:55,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-02 16:53:55,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:53:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2021-05-02 16:53:55,659 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2021-05-02 16:53:55,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:55,660 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2021-05-02 16:53:55,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 13 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:53:55,660 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2021-05-02 16:53:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 16:53:55,661 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:55,662 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:55,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 16:53:55,867 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:55,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:55,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1311310250, now seen corresponding path program 11 times [2021-05-02 16:53:55,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:55,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894918580] [2021-05-02 16:53:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:55,878 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:55,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504341131] [2021-05-02 16:53:55,878 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 [2021-05-02 16:53:57,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 16:53:57,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:57,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 16:53:57,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:57,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:57,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:57,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894918580] [2021-05-02 16:53:57,346 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:57,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504341131] [2021-05-02 16:53:57,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504341131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:57,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:57,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 16:53:57,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840466579] [2021-05-02 16:53:57,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 16:53:57,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:57,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 16:53:57,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 16:53:57,347 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:53:57,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:57,630 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2021-05-02 16:53:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 16:53:57,631 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 100 [2021-05-02 16:53:57,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:57,632 INFO L225 Difference]: With dead ends: 114 [2021-05-02 16:53:57,632 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 16:53:57,632 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 218.0ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-05-02 16:53:57,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 16:53:57,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-02 16:53:57,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:53:57,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-05-02 16:53:57,636 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 100 [2021-05-02 16:53:57,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:57,636 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-05-02 16:53:57,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:53:57,637 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-05-02 16:53:57,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 16:53:57,637 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:57,637 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:57,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 16:53:57,844 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:57,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:57,845 INFO L82 PathProgramCache]: Analyzing trace with hash -65749816, now seen corresponding path program 11 times [2021-05-02 16:53:57,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:57,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131840327] [2021-05-02 16:53:57,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:57,852 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:57,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545094594] [2021-05-02 16:53:57,852 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:58,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 16:53:58,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:58,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 16:53:58,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:58,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:58,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:58,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:58,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:58,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:58,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:58,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:58,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:58,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 26 proven. 295 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-05-02 16:53:59,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:59,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131840327] [2021-05-02 16:53:59,017 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:59,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545094594] [2021-05-02 16:53:59,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545094594] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:59,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:59,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 16:53:59,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226368688] [2021-05-02 16:53:59,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 16:53:59,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:59,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 16:53:59,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-02 16:53:59,018 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 14 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:53:59,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:59,319 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2021-05-02 16:53:59,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 16:53:59,319 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 14 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 106 [2021-05-02 16:53:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:59,320 INFO L225 Difference]: With dead ends: 116 [2021-05-02 16:53:59,320 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 16:53:59,320 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-02 16:53:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 16:53:59,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-02 16:53:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:53:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-05-02 16:53:59,325 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 106 [2021-05-02 16:53:59,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:59,325 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-05-02 16:53:59,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 14 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:53:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-05-02 16:53:59,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 16:53:59,325 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:59,325 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:59,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 16:53:59,533 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:59,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:59,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1935565549, now seen corresponding path program 12 times [2021-05-02 16:53:59,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:59,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457346865] [2021-05-02 16:53:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:59,537 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:59,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563508439] [2021-05-02 16:53:59,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:59,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 16:53:59,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:53:59,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 16:53:59,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:59,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,967 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:59,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:59,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457346865] [2021-05-02 16:53:59,968 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:59,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563508439] [2021-05-02 16:53:59,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563508439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:59,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:59,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 16:53:59,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568107307] [2021-05-02 16:53:59,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 16:53:59,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:59,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 16:53:59,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:53:59,970 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:54:00,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:54:00,204 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2021-05-02 16:54:00,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 16:54:00,204 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 108 [2021-05-02 16:54:00,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:54:00,205 INFO L225 Difference]: With dead ends: 122 [2021-05-02 16:54:00,205 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 16:54:00,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-05-02 16:54:00,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 16:54:00,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-05-02 16:54:00,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:54:00,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-05-02 16:54:00,210 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 108 [2021-05-02 16:54:00,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:54:00,210 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-05-02 16:54:00,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:54:00,210 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-05-02 16:54:00,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 16:54:00,211 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:54:00,211 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:54:00,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 16:54:00,414 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:54:00,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:54:00,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1170284597, now seen corresponding path program 12 times [2021-05-02 16:54:00,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:54:00,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405546322] [2021-05-02 16:54:00,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:54:00,420 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:54:00,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495277324] [2021-05-02 16:54:00,420 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 [2021-05-02 16:54:00,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 16:54:00,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:54:00,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-02 16:54:00,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:54:00,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:00,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:00,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:00,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:00,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:00,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:00,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:00,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:00,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:00,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:00,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:00,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 25 proven. 349 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-05-02 16:54:01,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:54:01,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405546322] [2021-05-02 16:54:01,113 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:54:01,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495277324] [2021-05-02 16:54:01,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495277324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:54:01,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:54:01,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 16:54:01,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312052734] [2021-05-02 16:54:01,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 16:54:01,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:54:01,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 16:54:01,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2021-05-02 16:54:01,114 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 15 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:54:01,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:54:01,452 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2021-05-02 16:54:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 16:54:01,453 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 15 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 114 [2021-05-02 16:54:01,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:54:01,453 INFO L225 Difference]: With dead ends: 124 [2021-05-02 16:54:01,453 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 16:54:01,454 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-05-02 16:54:01,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 16:54:01,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-02 16:54:01,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:54:01,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2021-05-02 16:54:01,458 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2021-05-02 16:54:01,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:54:01,459 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2021-05-02 16:54:01,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 15 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:54:01,459 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2021-05-02 16:54:01,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 16:54:01,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:54:01,459 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:54:01,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-02 16:54:01,663 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:54:01,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:54:01,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1334563120, now seen corresponding path program 13 times [2021-05-02 16:54:01,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:54:01,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113552176] [2021-05-02 16:54:01,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:54:01,668 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:54:01,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343501885] [2021-05-02 16:54:01,668 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:54:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:54:01,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 16:54:01,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:54:01,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:54:01,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:54:01,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113552176] [2021-05-02 16:54:01,994 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:54:01,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343501885] [2021-05-02 16:54:01,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343501885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:54:01,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:54:01,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 16:54:01,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330483348] [2021-05-02 16:54:01,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 16:54:01,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:54:01,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 16:54:01,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 16:54:01,995 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:54:02,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:54:02,347 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2021-05-02 16:54:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 16:54:02,347 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 116 [2021-05-02 16:54:02,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:54:02,348 INFO L225 Difference]: With dead ends: 130 [2021-05-02 16:54:02,348 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 16:54:02,348 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 293.4ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-05-02 16:54:02,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 16:54:02,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-05-02 16:54:02,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:54:02,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-05-02 16:54:02,359 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 116 [2021-05-02 16:54:02,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:54:02,359 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-05-02 16:54:02,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:54:02,359 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-05-02 16:54:02,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 16:54:02,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:54:02,360 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:54:02,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:54:02,573 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:54:02,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:54:02,573 INFO L82 PathProgramCache]: Analyzing trace with hash -966570034, now seen corresponding path program 13 times [2021-05-02 16:54:02,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:54:02,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079531340] [2021-05-02 16:54:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:54:02,577 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:54:02,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963601413] [2021-05-02 16:54:02,578 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:54:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:54:03,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-02 16:54:03,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:54:03,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:03,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:03,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:03,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:03,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:03,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:03,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:03,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:03,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 27 proven. 404 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 16:54:03,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:54:03,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079531340] [2021-05-02 16:54:03,556 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:54:03,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963601413] [2021-05-02 16:54:03,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963601413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:54:03,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:54:03,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 16:54:03,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189560513] [2021-05-02 16:54:03,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 16:54:03,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:54:03,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 16:54:03,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2021-05-02 16:54:03,557 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:54:03,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:54:03,920 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2021-05-02 16:54:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 16:54:03,920 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 122 [2021-05-02 16:54:03,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:54:03,921 INFO L225 Difference]: With dead ends: 132 [2021-05-02 16:54:03,921 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 16:54:03,921 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-05-02 16:54:03,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 16:54:03,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-05-02 16:54:03,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 16:54:03,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2021-05-02 16:54:03,926 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2021-05-02 16:54:03,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:54:03,926 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2021-05-02 16:54:03,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:54:03,926 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2021-05-02 16:54:03,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 16:54:03,927 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:54:03,927 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:54:04,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 16:54:04,133 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:54:04,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:54:04,133 INFO L82 PathProgramCache]: Analyzing trace with hash -464237453, now seen corresponding path program 14 times [2021-05-02 16:54:04,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:54:04,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101681356] [2021-05-02 16:54:04,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:54:04,138 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:54:04,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505074491] [2021-05-02 16:54:04,138 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:54:04,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:54:04,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:54:04,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 16:54:04,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:54:04,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:54:04,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:54:04,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101681356] [2021-05-02 16:54:04,489 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:54:04,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505074491] [2021-05-02 16:54:04,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505074491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:54:04,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:54:04,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 16:54:04,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794397758] [2021-05-02 16:54:04,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 16:54:04,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:54:04,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 16:54:04,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:54:04,490 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:54:52,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:54:52,034 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2021-05-02 16:54:52,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 16:54:52,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 124 [2021-05-02 16:54:52,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:54:52,035 INFO L225 Difference]: With dead ends: 138 [2021-05-02 16:54:52,035 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 16:54:52,036 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-05-02 16:54:52,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 16:54:52,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-05-02 16:54:52,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 16:54:52,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-05-02 16:54:52,040 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 124 [2021-05-02 16:54:52,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:54:52,041 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-05-02 16:54:52,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:54:52,041 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-05-02 16:54:52,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 16:54:52,041 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:54:52,041 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:54:52,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-02 16:54:52,249 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:54:52,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:54:52,249 INFO L82 PathProgramCache]: Analyzing trace with hash 467995857, now seen corresponding path program 14 times [2021-05-02 16:54:52,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:54:52,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113753687] [2021-05-02 16:54:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:54:52,253 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:54:52,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156854841] [2021-05-02 16:54:52,253 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:54:53,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:54:53,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:54:53,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-02 16:54:53,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:54:53,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:53,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:53,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:53,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:53,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:53,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:53,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:53,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:53,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 29 proven. 463 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-05-02 16:54:53,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:54:53,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113753687] [2021-05-02 16:54:53,483 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:54:53,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156854841] [2021-05-02 16:54:53,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156854841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:54:53,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:54:53,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 16:54:53,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277812156] [2021-05-02 16:54:53,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 16:54:53,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:54:53,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 16:54:53,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-05-02 16:54:53,484 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 17 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 16:54:53,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:54:53,881 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2021-05-02 16:54:53,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 16:54:53,881 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 17 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 130 [2021-05-02 16:54:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:54:53,882 INFO L225 Difference]: With dead ends: 140 [2021-05-02 16:54:53,882 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 16:54:53,882 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 259.3ms TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-05-02 16:54:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 16:54:53,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-05-02 16:54:53,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 16:54:53,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-05-02 16:54:53,888 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 130 [2021-05-02 16:54:53,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:54:53,888 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-05-02 16:54:53,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 17 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 16:54:53,888 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-05-02 16:54:53,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 16:54:53,889 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:54:53,889 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:54:54,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 16:54:54,093 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:54:54,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:54:54,093 INFO L82 PathProgramCache]: Analyzing trace with hash -530918218, now seen corresponding path program 15 times [2021-05-02 16:54:54,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:54:54,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586601494] [2021-05-02 16:54:54,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:54:54,104 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:54:54,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747611574] [2021-05-02 16:54:54,104 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:54:55,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 16:54:55,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:54:55,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 16:54:55,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:54:55,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:55,369 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:54:55,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:54:55,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586601494] [2021-05-02 16:54:55,370 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:54:55,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747611574] [2021-05-02 16:54:55,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747611574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:54:55,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:54:55,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 16:54:55,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897609983] [2021-05-02 16:54:55,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 16:54:55,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:54:55,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 16:54:55,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 16:54:55,371 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 16:54:55,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:54:55,646 INFO L93 Difference]: Finished difference Result 146 states and 147 transitions. [2021-05-02 16:54:55,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 16:54:55,647 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 132 [2021-05-02 16:54:55,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:54:55,647 INFO L225 Difference]: With dead ends: 146 [2021-05-02 16:54:55,647 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 16:54:55,648 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 16:54:55,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 16:54:55,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-05-02 16:54:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 16:54:55,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-05-02 16:54:55,653 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 132 [2021-05-02 16:54:55,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:54:55,653 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-05-02 16:54:55,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 16:54:55,653 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-05-02 16:54:55,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 16:54:55,653 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:54:55,654 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:54:55,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 16:54:55,858 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:54:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:54:55,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1557719340, now seen corresponding path program 15 times [2021-05-02 16:54:55,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:54:55,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823014071] [2021-05-02 16:54:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:54:55,862 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:54:55,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740504370] [2021-05-02 16:54:55,862 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:54:56,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 16:54:56,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:54:56,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 94 conjunts are in the unsatisfiable core [2021-05-02 16:54:56,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:54:56,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:56,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:56,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:56,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:58,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:00,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:00,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:00,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:00,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:00,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:00,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:00,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:17,707 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 27 DAG size of output: 9 [2021-05-02 16:55:17,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:17,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:17,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:17,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 110 proven. 519 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-05-02 16:55:17,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:55:17,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823014071] [2021-05-02 16:55:17,789 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:55:17,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740504370] [2021-05-02 16:55:17,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740504370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:55:17,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:55:17,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-02 16:55:17,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050433923] [2021-05-02 16:55:17,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 16:55:17,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:55:17,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 16:55:17,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=595, Unknown=2, NotChecked=0, Total=650 [2021-05-02 16:55:17,790 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 16:58:23,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:23,134 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2021-05-02 16:58:23,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 16:58:23,134 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 138 [2021-05-02 16:58:23,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:23,135 INFO L225 Difference]: With dead ends: 148 [2021-05-02 16:58:23,135 INFO L226 Difference]: Without dead ends: 143 [2021-05-02 16:58:23,136 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 21203.9ms TimeCoverageRelationStatistics Valid=69, Invalid=741, Unknown=2, NotChecked=0, Total=812 [2021-05-02 16:58:23,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-02 16:58:23,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-05-02 16:58:23,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 16:58:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2021-05-02 16:58:23,141 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 138 [2021-05-02 16:58:23,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:23,142 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2021-05-02 16:58:23,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 16:58:23,142 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2021-05-02 16:58:23,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-02 16:58:23,142 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:23,142 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:23,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-02 16:58:23,348 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:23,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:23,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1623037447, now seen corresponding path program 16 times [2021-05-02 16:58:23,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:23,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895070829] [2021-05-02 16:58:23,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:23,353 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:23,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776660239] [2021-05-02 16:58:23,353 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:24,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:58:24,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:24,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 16:58:24,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:24,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:24,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:24,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895070829] [2021-05-02 16:58:24,588 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:24,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776660239] [2021-05-02 16:58:24,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776660239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:24,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:24,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 16:58:24,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201890723] [2021-05-02 16:58:24,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 16:58:24,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:24,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 16:58:24,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 16:58:24,589 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 16:58:25,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:25,040 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2021-05-02 16:58:25,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 16:58:25,040 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 140 [2021-05-02 16:58:25,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:25,041 INFO L225 Difference]: With dead ends: 154 [2021-05-02 16:58:25,041 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 16:58:25,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 372.1ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 16:58:25,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 16:58:25,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-05-02 16:58:25,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 16:58:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-05-02 16:58:25,047 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 140 [2021-05-02 16:58:25,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:25,047 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-05-02 16:58:25,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 16:58:25,047 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-05-02 16:58:25,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-02 16:58:25,048 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:25,048 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:25,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-02 16:58:25,253 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:25,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:25,253 INFO L82 PathProgramCache]: Analyzing trace with hash 831286743, now seen corresponding path program 16 times [2021-05-02 16:58:25,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:25,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818942713] [2021-05-02 16:58:25,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:25,257 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:25,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396419229] [2021-05-02 16:58:25,257 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:26,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:58:26,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:26,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 16:58:26,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:26,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 33 proven. 593 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 16:58:26,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:26,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818942713] [2021-05-02 16:58:26,838 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:26,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396419229] [2021-05-02 16:58:26,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396419229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:26,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:26,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-02 16:58:26,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325799928] [2021-05-02 16:58:26,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 16:58:26,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:26,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 16:58:26,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-05-02 16:58:26,839 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 19 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 16:58:27,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:27,451 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2021-05-02 16:58:27,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 16:58:27,452 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 19 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 146 [2021-05-02 16:58:27,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:27,452 INFO L225 Difference]: With dead ends: 156 [2021-05-02 16:58:27,452 INFO L226 Difference]: Without dead ends: 151 [2021-05-02 16:58:27,453 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 356.6ms TimeCoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2021-05-02 16:58:27,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-02 16:58:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-05-02 16:58:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 16:58:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2021-05-02 16:58:27,458 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2021-05-02 16:58:27,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:27,459 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2021-05-02 16:58:27,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 19 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 16:58:27,459 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2021-05-02 16:58:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-02 16:58:27,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:27,459 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:27,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-02 16:58:27,664 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:27,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:27,664 INFO L82 PathProgramCache]: Analyzing trace with hash 699272252, now seen corresponding path program 17 times [2021-05-02 16:58:27,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:27,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845629934] [2021-05-02 16:58:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:27,668 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:27,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085228536] [2021-05-02 16:58:27,669 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:28,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 16:58:28,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:28,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 16:58:28,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:28,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:28,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:28,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845629934] [2021-05-02 16:58:28,806 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:28,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085228536] [2021-05-02 16:58:28,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085228536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:28,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:28,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 16:58:28,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712618697] [2021-05-02 16:58:28,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 16:58:28,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:28,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 16:58:28,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 16:58:28,807 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 20 states have internal predecessors, (110), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 16:58:29,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:29,317 INFO L93 Difference]: Finished difference Result 162 states and 163 transitions. [2021-05-02 16:58:29,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 16:58:29,318 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 20 states have internal predecessors, (110), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 148 [2021-05-02 16:58:29,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:29,319 INFO L225 Difference]: With dead ends: 162 [2021-05-02 16:58:29,319 INFO L226 Difference]: Without dead ends: 157 [2021-05-02 16:58:29,319 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 421.4ms TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 16:58:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-02 16:58:29,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-05-02 16:58:29,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 16:58:29,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-05-02 16:58:29,325 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 148 [2021-05-02 16:58:29,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:29,325 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-05-02 16:58:29,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 20 states have internal predecessors, (110), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 16:58:29,325 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-05-02 16:58:29,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 16:58:29,326 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:29,326 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:29,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:29,526 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:29,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:29,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1988619814, now seen corresponding path program 17 times [2021-05-02 16:58:29,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:29,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035282128] [2021-05-02 16:58:29,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:29,531 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:29,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040623372] [2021-05-02 16:58:29,531 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:32,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 16:58:32,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:32,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-02 16:58:32,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:32,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 41 proven. 658 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-05-02 16:58:32,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:32,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035282128] [2021-05-02 16:58:32,736 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:32,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040623372] [2021-05-02 16:58:32,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040623372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:32,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:32,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-02 16:58:32,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819556817] [2021-05-02 16:58:32,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 16:58:32,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:32,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 16:58:32,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2021-05-02 16:58:32,737 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 25 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 20 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 16:58:33,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:33,339 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2021-05-02 16:58:33,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 16:58:33,339 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 20 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 154 [2021-05-02 16:58:33,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:33,340 INFO L225 Difference]: With dead ends: 164 [2021-05-02 16:58:33,340 INFO L226 Difference]: Without dead ends: 159 [2021-05-02 16:58:33,340 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 406.5ms TimeCoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2021-05-02 16:58:33,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-02 16:58:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-05-02 16:58:33,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 16:58:33,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2021-05-02 16:58:33,346 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 154 [2021-05-02 16:58:33,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:33,347 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2021-05-02 16:58:33,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 20 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 16:58:33,347 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2021-05-02 16:58:33,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-02 16:58:33,347 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:33,347 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:33,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-02 16:58:33,554 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:33,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:33,555 INFO L82 PathProgramCache]: Analyzing trace with hash 893434751, now seen corresponding path program 18 times [2021-05-02 16:58:33,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:33,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056379531] [2021-05-02 16:58:33,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:33,559 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:33,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35710734] [2021-05-02 16:58:33,559 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:34,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 16:58:34,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:34,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 16:58:34,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:34,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:34,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:34,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056379531] [2021-05-02 16:58:34,732 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:34,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35710734] [2021-05-02 16:58:34,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35710734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:34,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:34,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 16:58:34,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133744812] [2021-05-02 16:58:34,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 16:58:34,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:34,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 16:58:34,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 16:58:34,733 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 21 states have internal predecessors, (116), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 16:58:35,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:35,239 INFO L93 Difference]: Finished difference Result 170 states and 171 transitions. [2021-05-02 16:58:35,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 16:58:35,239 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 21 states have internal predecessors, (116), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 156 [2021-05-02 16:58:35,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:35,240 INFO L225 Difference]: With dead ends: 170 [2021-05-02 16:58:35,240 INFO L226 Difference]: Without dead ends: 165 [2021-05-02 16:58:35,240 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 419.4ms TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 16:58:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-02 16:58:35,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-05-02 16:58:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 16:58:35,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2021-05-02 16:58:35,246 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 156 [2021-05-02 16:58:35,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:35,246 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2021-05-02 16:58:35,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 21 states have internal predecessors, (116), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 16:58:35,246 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2021-05-02 16:58:35,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 16:58:35,247 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:35,247 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:35,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:35,452 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:35,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1514996445, now seen corresponding path program 18 times [2021-05-02 16:58:35,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:35,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305700885] [2021-05-02 16:58:35,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:35,456 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:35,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7035181] [2021-05-02 16:58:35,457 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:36,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 16:58:36,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:36,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 91 conjunts are in the unsatisfiable core [2021-05-02 16:58:36,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:36,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 37 proven. 739 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-05-02 16:58:36,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:36,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305700885] [2021-05-02 16:58:36,979 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:36,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7035181] [2021-05-02 16:58:36,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7035181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:36,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:36,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-05-02 16:58:36,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622287274] [2021-05-02 16:58:36,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 16:58:36,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:36,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 16:58:36,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2021-05-02 16:58:36,980 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 21 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 16:58:37,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:37,677 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2021-05-02 16:58:37,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 16:58:37,678 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 21 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 162 [2021-05-02 16:58:37,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:37,679 INFO L225 Difference]: With dead ends: 172 [2021-05-02 16:58:37,679 INFO L226 Difference]: Without dead ends: 167 [2021-05-02 16:58:37,679 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 435.6ms TimeCoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2021-05-02 16:58:37,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-02 16:58:37,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-05-02 16:58:37,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 16:58:37,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2021-05-02 16:58:37,685 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 162 [2021-05-02 16:58:37,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:37,685 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2021-05-02 16:58:37,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 21 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 16:58:37,686 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2021-05-02 16:58:37,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-05-02 16:58:37,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:37,686 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:37,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-02 16:58:37,893 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:37,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:37,893 INFO L82 PathProgramCache]: Analyzing trace with hash 614299586, now seen corresponding path program 19 times [2021-05-02 16:58:37,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:37,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368532239] [2021-05-02 16:58:37,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:37,897 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:37,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575075070] [2021-05-02 16:58:37,897 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:58:37,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 16:58:37,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:37,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:38,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:38,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368532239] [2021-05-02 16:58:38,434 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:38,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575075070] [2021-05-02 16:58:38,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575075070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:38,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:38,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-02 16:58:38,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373370182] [2021-05-02 16:58:38,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 16:58:38,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:38,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 16:58:38,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 16:58:38,436 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 22 states have internal predecessors, (122), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 16:58:38,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:38,961 INFO L93 Difference]: Finished difference Result 178 states and 179 transitions. [2021-05-02 16:58:38,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 16:58:38,962 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 22 states have internal predecessors, (122), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 164 [2021-05-02 16:58:38,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:38,963 INFO L225 Difference]: With dead ends: 178 [2021-05-02 16:58:38,963 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 16:58:38,963 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 472.0ms TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 16:58:38,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 16:58:38,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-02 16:58:38,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 16:58:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2021-05-02 16:58:38,969 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 164 [2021-05-02 16:58:38,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:38,969 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2021-05-02 16:58:38,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 22 states have internal predecessors, (122), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 16:58:38,970 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2021-05-02 16:58:38,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-02 16:58:38,970 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:38,970 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:39,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:39,181 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:39,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:39,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1080967392, now seen corresponding path program 19 times [2021-05-02 16:58:39,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:39,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924331437] [2021-05-02 16:58:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:39,185 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:39,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509880530] [2021-05-02 16:58:39,185 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:58:39,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 92 conjunts are in the unsatisfiable core [2021-05-02 16:58:39,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:39,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:40,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:40,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:40,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:40,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:40,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:40,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:40,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:40,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 39 proven. 818 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-05-02 16:58:40,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:40,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924331437] [2021-05-02 16:58:40,454 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:40,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509880530] [2021-05-02 16:58:40,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509880530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:40,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:40,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-05-02 16:58:40,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702861764] [2021-05-02 16:58:40,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 16:58:40,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:40,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 16:58:40,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2021-05-02 16:58:40,455 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 27 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 22 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 16:58:43,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:43,222 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2021-05-02 16:58:43,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 16:58:43,223 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 22 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 170 [2021-05-02 16:58:43,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:43,224 INFO L225 Difference]: With dead ends: 180 [2021-05-02 16:58:43,224 INFO L226 Difference]: Without dead ends: 175 [2021-05-02 16:58:43,224 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 436.0ms TimeCoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2021-05-02 16:58:43,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-02 16:58:43,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-05-02 16:58:43,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 16:58:43,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2021-05-02 16:58:43,230 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2021-05-02 16:58:43,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:43,230 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2021-05-02 16:58:43,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 22 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 16:58:43,230 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2021-05-02 16:58:43,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-05-02 16:58:43,231 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:43,231 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:43,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:43,436 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:43,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:43,436 INFO L82 PathProgramCache]: Analyzing trace with hash 124207365, now seen corresponding path program 20 times [2021-05-02 16:58:43,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:43,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961223921] [2021-05-02 16:58:43,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:43,440 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:43,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958476873] [2021-05-02 16:58:43,440 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:43,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:58:43,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:43,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 16:58:43,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:43,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:43,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:43,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961223921] [2021-05-02 16:58:43,989 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:43,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958476873] [2021-05-02 16:58:43,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958476873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:43,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:43,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-02 16:58:43,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530762019] [2021-05-02 16:58:43,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 16:58:43,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:43,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 16:58:43,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 16:58:43,990 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand has 24 states, 24 states have (on average 5.333333333333333) internal successors, (128), 23 states have internal predecessors, (128), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 16:58:44,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:44,552 INFO L93 Difference]: Finished difference Result 186 states and 187 transitions. [2021-05-02 16:58:44,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 16:58:44,553 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.333333333333333) internal successors, (128), 23 states have internal predecessors, (128), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 172 [2021-05-02 16:58:44,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:44,554 INFO L225 Difference]: With dead ends: 186 [2021-05-02 16:58:44,554 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 16:58:44,554 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 500.5ms TimeCoverageRelationStatistics Valid=715, Invalid=1177, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 16:58:44,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 16:58:44,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-05-02 16:58:44,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 16:58:44,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2021-05-02 16:58:44,560 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 172 [2021-05-02 16:58:44,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:44,561 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2021-05-02 16:58:44,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.333333333333333) internal successors, (128), 23 states have internal predecessors, (128), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 16:58:44,561 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2021-05-02 16:58:44,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-02 16:58:44,561 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:44,561 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:44,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-02 16:58:44,781 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:44,781 INFO L82 PathProgramCache]: Analyzing trace with hash -985740317, now seen corresponding path program 20 times [2021-05-02 16:58:44,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:44,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524175949] [2021-05-02 16:58:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:44,789 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:44,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873666517] [2021-05-02 16:58:44,790 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:45,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:58:45,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:45,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 96 conjunts are in the unsatisfiable core [2021-05-02 16:58:45,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:45,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:46,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:46,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:46,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:46,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:46,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:46,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:46,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:46,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 41 proven. 901 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-05-02 16:58:46,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:46,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524175949] [2021-05-02 16:58:46,514 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:46,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873666517] [2021-05-02 16:58:46,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873666517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:46,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:46,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-05-02 16:58:46,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644901961] [2021-05-02 16:58:46,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 16:58:46,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:46,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 16:58:46,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-05-02 16:58:46,515 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 28 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 23 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 16:58:47,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:47,255 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2021-05-02 16:58:47,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 16:58:47,256 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 23 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 178 [2021-05-02 16:58:47,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:47,257 INFO L225 Difference]: With dead ends: 188 [2021-05-02 16:58:47,257 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 16:58:47,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 444.1ms TimeCoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2021-05-02 16:58:47,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 16:58:47,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2021-05-02 16:58:47,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 25 states have call successors, (25), 24 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 16:58:47,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2021-05-02 16:58:47,263 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 178 [2021-05-02 16:58:47,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:47,263 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2021-05-02 16:58:47,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 23 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 16:58:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2021-05-02 16:58:47,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-02 16:58:47,264 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:47,264 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:47,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:47,469 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:47,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:47,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1707010232, now seen corresponding path program 21 times [2021-05-02 16:58:47,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:47,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129185987] [2021-05-02 16:58:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:47,474 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:47,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541984050] [2021-05-02 16:58:47,474 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:48,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-02 16:58:48,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:48,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 16:58:48,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:48,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:48,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:49,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:49,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:49,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:49,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:49,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:49,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:49,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:49,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:49,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:49,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:49,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:49,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:49,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:49,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:49,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:49,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129185987] [2021-05-02 16:58:49,138 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:49,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541984050] [2021-05-02 16:58:49,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541984050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:49,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:49,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-02 16:58:49,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695420032] [2021-05-02 16:58:49,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 16:58:49,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:49,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 16:58:49,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 16:58:49,139 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand has 25 states, 25 states have (on average 5.36) internal successors, (134), 24 states have internal predecessors, (134), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 16:58:49,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:49,795 INFO L93 Difference]: Finished difference Result 194 states and 195 transitions. [2021-05-02 16:58:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 16:58:49,795 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.36) internal successors, (134), 24 states have internal predecessors, (134), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 180 [2021-05-02 16:58:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:49,796 INFO L225 Difference]: With dead ends: 194 [2021-05-02 16:58:49,796 INFO L226 Difference]: Without dead ends: 189 [2021-05-02 16:58:49,797 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 557.3ms TimeCoverageRelationStatistics Valid=782, Invalid=1288, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 16:58:49,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-02 16:58:49,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-05-02 16:58:49,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 16:58:49,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2021-05-02 16:58:49,803 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 180 [2021-05-02 16:58:49,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:49,803 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2021-05-02 16:58:49,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.36) internal successors, (134), 24 states have internal predecessors, (134), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 16:58:49,803 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2021-05-02 16:58:49,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-05-02 16:58:49,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:49,804 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:50,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-02 16:58:50,011 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:50,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:50,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1596040166, now seen corresponding path program 21 times [2021-05-02 16:58:50,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:50,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669942555] [2021-05-02 16:58:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:50,016 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:50,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045584702] [2021-05-02 16:58:50,017 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:51,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-02 16:58:51,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:51,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 103 conjunts are in the unsatisfiable core [2021-05-02 16:58:51,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:51,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 43 proven. 988 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-05-02 16:58:52,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:52,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669942555] [2021-05-02 16:58:52,043 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:52,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045584702] [2021-05-02 16:58:52,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045584702] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:52,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:52,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-05-02 16:58:52,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23832571] [2021-05-02 16:58:52,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 16:58:52,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:52,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 16:58:52,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2021-05-02 16:58:52,044 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 30 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 24 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 16:58:52,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:52,876 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2021-05-02 16:58:52,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 16:58:52,877 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 24 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 186 [2021-05-02 16:58:52,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:52,877 INFO L225 Difference]: With dead ends: 196 [2021-05-02 16:58:52,877 INFO L226 Difference]: Without dead ends: 191 [2021-05-02 16:58:52,878 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 546.3ms TimeCoverageRelationStatistics Valid=74, Invalid=982, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 16:58:52,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-02 16:58:52,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-05-02 16:58:52,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 26 states have call successors, (26), 25 states have call predecessors, (26), 23 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 16:58:52,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2021-05-02 16:58:52,884 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 186 [2021-05-02 16:58:52,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:52,892 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2021-05-02 16:58:52,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 24 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 16:58:52,892 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2021-05-02 16:58:52,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-05-02 16:58:52,893 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:52,893 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:53,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:53,098 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:53,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:53,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1187904139, now seen corresponding path program 22 times [2021-05-02 16:58:53,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:53,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765400982] [2021-05-02 16:58:53,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:53,103 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:53,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420579168] [2021-05-02 16:58:53,103 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:54,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:58:54,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:54,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 16:58:54,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:54,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:55,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:55,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:55,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:55,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:55,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:55,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:55,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765400982] [2021-05-02 16:58:55,085 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:55,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420579168] [2021-05-02 16:58:55,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420579168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:55,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:55,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-02 16:58:55,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051179637] [2021-05-02 16:58:55,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 16:58:55,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:55,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 16:58:55,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 16:58:55,086 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 25 states have internal predecessors, (140), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 16:58:55,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:55,710 INFO L93 Difference]: Finished difference Result 202 states and 203 transitions. [2021-05-02 16:58:55,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 16:58:55,711 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 25 states have internal predecessors, (140), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 188 [2021-05-02 16:58:55,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:55,711 INFO L225 Difference]: With dead ends: 202 [2021-05-02 16:58:55,711 INFO L226 Difference]: Without dead ends: 197 [2021-05-02 16:58:55,712 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 637.2ms TimeCoverageRelationStatistics Valid=852, Invalid=1404, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 16:58:55,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-02 16:58:55,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-05-02 16:58:55,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 16:58:55,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2021-05-02 16:58:55,718 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 188 [2021-05-02 16:58:55,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:55,719 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2021-05-02 16:58:55,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 25 states have internal predecessors, (140), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 16:58:55,719 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2021-05-02 16:58:55,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-02 16:58:55,719 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:55,720 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:55,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-02 16:58:55,925 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:55,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:55,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1903806697, now seen corresponding path program 22 times [2021-05-02 16:58:55,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:55,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068125295] [2021-05-02 16:58:55,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:55,930 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:55,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886054274] [2021-05-02 16:58:55,930 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:57,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:58:57,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:57,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 104 conjunts are in the unsatisfiable core [2021-05-02 16:58:57,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:57,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 45 proven. 1079 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-05-02 16:58:58,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:58,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068125295] [2021-05-02 16:58:58,250 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:58,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886054274] [2021-05-02 16:58:58,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886054274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:58,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:58,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-05-02 16:58:58,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670444757] [2021-05-02 16:58:58,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 16:58:58,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:58,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 16:58:58,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2021-05-02 16:58:58,252 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 25 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 16:58:59,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:59,103 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2021-05-02 16:58:59,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 16:58:59,103 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 25 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 194 [2021-05-02 16:58:59,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:59,104 INFO L225 Difference]: With dead ends: 204 [2021-05-02 16:58:59,104 INFO L226 Difference]: Without dead ends: 199 [2021-05-02 16:58:59,104 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 499.4ms TimeCoverageRelationStatistics Valid=73, Invalid=983, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 16:58:59,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-02 16:58:59,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-05-02 16:58:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 16:58:59,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2021-05-02 16:58:59,111 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 194 [2021-05-02 16:58:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:59,111 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2021-05-02 16:58:59,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 25 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 16:58:59,111 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2021-05-02 16:58:59,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-05-02 16:58:59,112 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:59,112 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:59,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:59,317 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:59,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:59,318 INFO L82 PathProgramCache]: Analyzing trace with hash 598797006, now seen corresponding path program 23 times [2021-05-02 16:58:59,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:59,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165561322] [2021-05-02 16:58:59,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:59,322 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:59,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980150635] [2021-05-02 16:58:59,322 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true