/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/hard-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:44:50,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:44:50,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:44:50,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:44:50,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:44:50,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:44:50,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:44:50,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:44:50,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:44:50,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:44:50,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:44:50,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:44:50,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:44:50,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:44:50,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:44:50,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:44:50,969 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:44:50,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:44:50,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:44:50,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:44:50,979 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 13:44:51,016 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:44:51,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:44:51,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:44:51,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:44:51,019 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:44:51,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:44:51,019 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:44:51,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:44:51,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:44:51,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:44:51,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:44:51,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:44:51,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:44:51,020 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:44:51,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:44:51,021 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:44:51,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:44:51,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:44:51,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:44:51,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:44:51,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:44:51,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:44:51,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:44:51,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:44:51,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:44:51,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:44:51,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:44:51,022 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:44:51,022 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:44:51,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:44:51,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:44:51,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:44:51,331 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:44:51,331 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:44:51,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard-ll.c [2021-05-02 13:44:51,390 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d99fafa7/797c6b611e7047a6b8d0a40baabd55ac/FLAGb9ff5d0e7 [2021-05-02 13:44:51,819 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:44:51,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard-ll.c [2021-05-02 13:44:51,826 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d99fafa7/797c6b611e7047a6b8d0a40baabd55ac/FLAGb9ff5d0e7 [2021-05-02 13:44:51,842 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d99fafa7/797c6b611e7047a6b8d0a40baabd55ac [2021-05-02 13:44:51,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:44:51,847 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:44:51,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:44:51,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:44:51,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:44:51,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:44:51" (1/1) ... [2021-05-02 13:44:51,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d0adfed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:51, skipping insertion in model container [2021-05-02 13:44:51,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:44:51" (1/1) ... [2021-05-02 13:44:51,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:44:51,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:44:51,977 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/hard-ll.c[546,559] [2021-05-02 13:44:51,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:44:51,995 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:44:52,005 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/hard-ll.c[546,559] [2021-05-02 13:44:52,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:44:52,022 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:44:52,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:52 WrapperNode [2021-05-02 13:44:52,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:44:52,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:44:52,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:44:52,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:44:52,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:52" (1/1) ... [2021-05-02 13:44:52,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:52" (1/1) ... [2021-05-02 13:44:52,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:52" (1/1) ... [2021-05-02 13:44:52,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:52" (1/1) ... [2021-05-02 13:44:52,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:52" (1/1) ... [2021-05-02 13:44:52,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:52" (1/1) ... [2021-05-02 13:44:52,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:52" (1/1) ... [2021-05-02 13:44:52,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:44:52,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:44:52,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:44:52,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:44:52,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:52" (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 13:44:52,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:44:52,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:44:52,144 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:44:52,144 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:44:52,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:44:52,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:44:52,145 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:44:52,145 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:44:52,145 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:44:52,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:44:52,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 13:44:52,145 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:44:52,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:44:52,145 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:44:52,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:44:52,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:44:52,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:44:52,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:44:52,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:44:52,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:44:52,350 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:44:52,350 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 13:44:52,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:44:52 BoogieIcfgContainer [2021-05-02 13:44:52,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:44:52,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:44:52,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:44:52,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:44:52,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:44:51" (1/3) ... [2021-05-02 13:44:52,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c23a5e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:44:52, skipping insertion in model container [2021-05-02 13:44:52,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:52" (2/3) ... [2021-05-02 13:44:52,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c23a5e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:44:52, skipping insertion in model container [2021-05-02 13:44:52,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:44:52" (3/3) ... [2021-05-02 13:44:52,371 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll.c [2021-05-02 13:44:52,376 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:44:52,378 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:44:52,405 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:44:52,439 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:44:52,439 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:44:52,439 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:44:52,439 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:44:52,439 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:44:52,439 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:44:52,439 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:44:52,439 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:44:52,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 13:44:52,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:44:52,483 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:52,483 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:52,484 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:52,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:52,488 INFO L82 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2021-05-02 13:44:52,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:52,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83921573] [2021-05-02 13:44:52,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:52,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:44:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:52,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:44:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:52,744 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 13:44:52,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:52,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83921573] [2021-05-02 13:44:52,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83921573] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:44:52,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:44:52,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:44:52,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736693282] [2021-05-02 13:44:52,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:44:52,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:52,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:44:52,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:44:52,764 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:44:52,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:52,917 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2021-05-02 13:44:52,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:44:52,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 13:44:52,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:52,927 INFO L225 Difference]: With dead ends: 61 [2021-05-02 13:44:52,928 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 13:44:52,931 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:44:52,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 13:44:52,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 13:44:52,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 13:44:52,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-02 13:44:52,983 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-05-02 13:44:52,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:52,983 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-02 13:44:52,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:44:52,984 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-02 13:44:52,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:44:52,985 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:52,985 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:52,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:44:52,985 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:52,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:52,987 INFO L82 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2021-05-02 13:44:52,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:52,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639031126] [2021-05-02 13:44:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:53,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:44:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:53,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:44:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:53,182 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 13:44:53,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:53,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639031126] [2021-05-02 13:44:53,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639031126] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:44:53,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:44:53,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 13:44:53,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627431704] [2021-05-02 13:44:53,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:44:53,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:53,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:44:53,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:44:53,187 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:44:53,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:53,464 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2021-05-02 13:44:53,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:44:53,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 13:44:53,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:53,466 INFO L225 Difference]: With dead ends: 43 [2021-05-02 13:44:53,466 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 13:44:53,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:44:53,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 13:44:53,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-02 13:44:53,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 13:44:53,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-02 13:44:53,476 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-05-02 13:44:53,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:53,476 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-02 13:44:53,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:44:53,476 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-02 13:44:53,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:44:53,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:53,477 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:53,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 13:44:53,477 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:53,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:53,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2021-05-02 13:44:53,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:53,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573750766] [2021-05-02 13:44:53,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:53,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:44:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:53,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:44:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:53,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 13:44:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:44:53,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:53,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573750766] [2021-05-02 13:44:53,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573750766] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:44:53,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:44:53,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 13:44:53,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551017127] [2021-05-02 13:44:53,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:44:53,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:53,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:44:53,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:44:53,615 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:44:53,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:53,883 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-05-02 13:44:53,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:44:53,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 13:44:53,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:53,886 INFO L225 Difference]: With dead ends: 47 [2021-05-02 13:44:53,887 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 13:44:53,888 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:44:53,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 13:44:53,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-05-02 13:44:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 13:44:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-02 13:44:53,903 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2021-05-02 13:44:53,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:53,903 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-02 13:44:53,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:44:53,903 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-02 13:44:53,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 13:44:53,904 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:53,904 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:53,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 13:44:53,904 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:53,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:53,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2021-05-02 13:44:53,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:53,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102591684] [2021-05-02 13:44:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:53,930 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:44:53,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27547255] [2021-05-02 13:44:53,931 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 13:44:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:54,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:44:54,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:44:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:44:54,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:54,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102591684] [2021-05-02 13:44:54,239 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:44:54,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27547255] [2021-05-02 13:44:54,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27547255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:44:54,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:44:54,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:44:54,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590720919] [2021-05-02 13:44:54,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:44:54,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:54,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:44:54,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:44:54,241 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:44:54,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:54,422 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2021-05-02 13:44:54,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:44:54,423 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-05-02 13:44:54,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:54,425 INFO L225 Difference]: With dead ends: 70 [2021-05-02 13:44:54,425 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 13:44:54,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:44:54,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 13:44:54,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 13:44:54,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 13:44:54,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-05-02 13:44:54,447 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 27 [2021-05-02 13:44:54,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:54,447 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-05-02 13:44:54,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:44:54,448 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-05-02 13:44:54,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 13:44:54,449 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:54,449 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:54,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:54,674 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:54,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:54,675 INFO L82 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 1 times [2021-05-02 13:44:54,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:54,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550885034] [2021-05-02 13:44:54,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:54,683 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:44:54,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017971891] [2021-05-02 13:44:54,683 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 13:44:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:54,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 13:44:54,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:44:54,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:54,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:54,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:54,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:54,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:54,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:54,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:54,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:44:55,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:55,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550885034] [2021-05-02 13:44:55,011 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:44:55,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017971891] [2021-05-02 13:44:55,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017971891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:44:55,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:44:55,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:44:55,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249267319] [2021-05-02 13:44:55,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:44:55,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:55,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:44:55,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:44:55,017 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 13:44:55,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:55,182 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2021-05-02 13:44:55,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:44:55,183 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 13:44:55,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:55,186 INFO L225 Difference]: With dead ends: 69 [2021-05-02 13:44:55,186 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 13:44:55,190 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:44:55,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 13:44:55,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 13:44:55,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 38 states have internal predecessors, (42), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 13:44:55,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-05-02 13:44:55,209 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 34 [2021-05-02 13:44:55,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:55,209 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-05-02 13:44:55,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 13:44:55,210 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-05-02 13:44:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 13:44:55,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:55,212 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:55,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:55,417 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:55,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:55,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 1 times [2021-05-02 13:44:55,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:55,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133149051] [2021-05-02 13:44:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:55,426 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:44:55,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101418660] [2021-05-02 13:44:55,426 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 13:44:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:55,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 13:44:55,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:44:55,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:55,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:55,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:55,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:55,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:55,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:55,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:55,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:55,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:55,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:55,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:55,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 13:44:55,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:55,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133149051] [2021-05-02 13:44:55,698 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:44:55,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101418660] [2021-05-02 13:44:55,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101418660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:44:55,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:44:55,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 13:44:55,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107153067] [2021-05-02 13:44:55,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:44:55,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:55,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:44:55,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:44:55,701 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 13:44:55,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:55,998 INFO L93 Difference]: Finished difference Result 108 states and 138 transitions. [2021-05-02 13:44:55,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:44:55,998 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2021-05-02 13:44:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:56,004 INFO L225 Difference]: With dead ends: 108 [2021-05-02 13:44:56,004 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 13:44:56,005 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:44:56,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 13:44:56,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-02 13:44:56,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 47 states have (on average 1.148936170212766) internal successors, (54), 49 states have internal predecessors, (54), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 13:44:56,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2021-05-02 13:44:56,020 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 44 [2021-05-02 13:44:56,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:56,020 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2021-05-02 13:44:56,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 13:44:56,020 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2021-05-02 13:44:56,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 13:44:56,021 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:56,021 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:56,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:56,237 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:56,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:56,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1230656439, now seen corresponding path program 2 times [2021-05-02 13:44:56,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:56,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784383166] [2021-05-02 13:44:56,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:56,245 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:44:56,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555016342] [2021-05-02 13:44:56,246 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 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 13:44:56,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:44:56,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:44:56,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 13:44:56,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:44:56,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:56,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:56,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:56,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:56,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:56,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:56,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:56,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:56,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:56,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:56,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:56,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:56,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:56,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:56,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:56,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:56,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:56,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-05-02 13:44:56,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:56,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784383166] [2021-05-02 13:44:56,585 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:44:56,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555016342] [2021-05-02 13:44:56,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555016342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:44:56,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:44:56,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 13:44:56,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256980922] [2021-05-02 13:44:56,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:44:56,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:56,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:44:56,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:44:56,587 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 13:44:56,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:56,941 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2021-05-02 13:44:56,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:44:56,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 61 [2021-05-02 13:44:56,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:56,942 INFO L225 Difference]: With dead ends: 131 [2021-05-02 13:44:56,943 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 13:44:56,943 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:44:56,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 13:44:56,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2021-05-02 13:44:56,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 59 states have (on average 1.152542372881356) internal successors, (68), 62 states have internal predecessors, (68), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 13:44:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2021-05-02 13:44:56,961 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 61 [2021-05-02 13:44:56,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:56,961 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2021-05-02 13:44:56,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 13:44:56,962 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2021-05-02 13:44:56,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 13:44:56,963 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:56,963 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:57,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:57,177 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:57,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:57,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 1 times [2021-05-02 13:44:57,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:57,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575461598] [2021-05-02 13:44:57,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:57,185 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:44:57,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258162644] [2021-05-02 13:44:57,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:57,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 13:44:57,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:44:57,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:57,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:57,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:57,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:57,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:57,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:57,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:57,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:57,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:57,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:57,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:57,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:57,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:57,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:57,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:57,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:57,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:57,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-02 13:44:57,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:57,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575461598] [2021-05-02 13:44:57,629 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:44:57,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258162644] [2021-05-02 13:44:57,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258162644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:44:57,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:44:57,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 13:44:57,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387382120] [2021-05-02 13:44:57,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:44:57,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:57,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:44:57,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:44:57,631 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 13:44:57,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:57,841 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2021-05-02 13:44:57,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:44:57,842 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2021-05-02 13:44:57,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:57,844 INFO L225 Difference]: With dead ends: 123 [2021-05-02 13:44:57,844 INFO L226 Difference]: Without dead ends: 121 [2021-05-02 13:44:57,845 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:44:57,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-02 13:44:57,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2021-05-02 13:44:57,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 75 states have internal predecessors, (84), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 13:44:57,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2021-05-02 13:44:57,870 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 64 [2021-05-02 13:44:57,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:57,870 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2021-05-02 13:44:57,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 13:44:57,870 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2021-05-02 13:44:57,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 13:44:57,871 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:57,871 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:58,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:58,088 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:58,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:58,089 INFO L82 PathProgramCache]: Analyzing trace with hash -262609796, now seen corresponding path program 2 times [2021-05-02 13:44:58,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:58,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237214953] [2021-05-02 13:44:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:58,095 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:44:58,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130184945] [2021-05-02 13:44:58,096 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 13:44:58,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:44:58,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:44:58,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 13:44:58,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:44:58,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:58,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:58,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:58,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:58,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:58,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:58,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:58,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:58,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:58,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:58,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:58,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:58,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:58,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:58,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-02 13:44:58,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:58,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237214953] [2021-05-02 13:44:58,407 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:44:58,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130184945] [2021-05-02 13:44:58,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130184945] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:44:58,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:44:58,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:44:58,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171700243] [2021-05-02 13:44:58,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:44:58,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:58,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:44:58,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:44:58,409 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 13:44:58,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:58,651 INFO L93 Difference]: Finished difference Result 146 states and 176 transitions. [2021-05-02 13:44:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:44:58,652 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 69 [2021-05-02 13:44:58,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:58,653 INFO L225 Difference]: With dead ends: 146 [2021-05-02 13:44:58,653 INFO L226 Difference]: Without dead ends: 123 [2021-05-02 13:44:58,654 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:44:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-02 13:44:58,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-05-02 13:44:58,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 75 states have (on average 1.12) internal successors, (84), 78 states have internal predecessors, (84), 31 states have call successors, (31), 17 states have call predecessors, (31), 16 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 13:44:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 143 transitions. [2021-05-02 13:44:58,667 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 143 transitions. Word has length 69 [2021-05-02 13:44:58,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:58,667 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 143 transitions. [2021-05-02 13:44:58,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 13:44:58,667 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 143 transitions. [2021-05-02 13:44:58,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 13:44:58,668 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:58,669 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:58,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:58,891 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:58,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:58,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 1 times [2021-05-02 13:44:58,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:58,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556686416] [2021-05-02 13:44:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:58,898 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:44:58,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638505166] [2021-05-02 13:44:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:58,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 13:44:58,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:44:59,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:59,503 WARN L159 QuantifierPusher]: Ignoring assumption.