/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/divbin2_valuebound50.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:36:30,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:36:30,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:36:30,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:36:30,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:36:30,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:36:30,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:36:30,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:36:30,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:36:30,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:36:30,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:36:30,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:36:30,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:36:30,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:36:30,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:36:30,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:36:30,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:36:30,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:36:30,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:36:30,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:36:30,094 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 14:36:30,107 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:36:30,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:36:30,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:36:30,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:36:30,108 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:36:30,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:36:30,109 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:36:30,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:36:30,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:36:30,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:36:30,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:36:30,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:36:30,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:36:30,109 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:36:30,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:36:30,109 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:36:30,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:36:30,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:36:30,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:36:30,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:36:30,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:36:30,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:36:30,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:36:30,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:36:30,110 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:36:30,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:36:30,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:36:30,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:36:30,111 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:36:30,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:36:30,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:36:30,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:36:30,360 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:36:30,361 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:36:30,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound50.i [2021-05-02 14:36:30,412 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d9c884df/ebb5025f2bbc40198f8eeb8ba5495325/FLAGbc7ae2c75 [2021-05-02 14:36:30,699 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:36:30,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound50.i [2021-05-02 14:36:30,715 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d9c884df/ebb5025f2bbc40198f8eeb8ba5495325/FLAGbc7ae2c75 [2021-05-02 14:36:31,131 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d9c884df/ebb5025f2bbc40198f8eeb8ba5495325 [2021-05-02 14:36:31,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:36:31,134 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:36:31,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:36:31,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:36:31,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:36:31,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:36:31" (1/1) ... [2021-05-02 14:36:31,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36e31563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:31, skipping insertion in model container [2021-05-02 14:36:31,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:36:31" (1/1) ... [2021-05-02 14:36:31,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:36:31,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:36:31,240 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/divbin2_valuebound50.i[959,972] [2021-05-02 14:36:31,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:36:31,252 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:36:31,288 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/divbin2_valuebound50.i[959,972] [2021-05-02 14:36:31,301 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:36:31,314 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:36:31,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:31 WrapperNode [2021-05-02 14:36:31,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:36:31,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:36:31,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:36:31,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:36:31,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:31" (1/1) ... [2021-05-02 14:36:31,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:31" (1/1) ... [2021-05-02 14:36:31,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:31" (1/1) ... [2021-05-02 14:36:31,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:31" (1/1) ... [2021-05-02 14:36:31,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:31" (1/1) ... [2021-05-02 14:36:31,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:31" (1/1) ... [2021-05-02 14:36:31,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:31" (1/1) ... [2021-05-02 14:36:31,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:36:31,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:36:31,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:36:31,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:36:31,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:36:31,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:36:31,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:36:31,415 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:36:31,416 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:36:31,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:36:31,416 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:36:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:36:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:36:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 14:36:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 14:36:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:36:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:36:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 14:36:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:36:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:36:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:36:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:36:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:36:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:36:31,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:36:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:36:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:36:31,623 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:36:31,623 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:36:31,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:36:31 BoogieIcfgContainer [2021-05-02 14:36:31,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:36:31,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:36:31,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:36:31,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:36:31,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:36:31" (1/3) ... [2021-05-02 14:36:31,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d646d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:36:31, skipping insertion in model container [2021-05-02 14:36:31,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:31" (2/3) ... [2021-05-02 14:36:31,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d646d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:36:31, skipping insertion in model container [2021-05-02 14:36:31,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:36:31" (3/3) ... [2021-05-02 14:36:31,628 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound50.i [2021-05-02 14:36:31,632 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:36:31,634 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:36:31,643 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:36:31,656 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:36:31,656 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:36:31,656 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:36:31,656 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:36:31,656 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:36:31,656 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:36:31,657 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:36:31,657 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:36:31,668 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 14:36:31,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 14:36:31,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:31,672 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:31,672 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:31,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:31,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1171333446, now seen corresponding path program 1 times [2021-05-02 14:36:31,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:31,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101141347] [2021-05-02 14:36:31,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:31,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:36:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:31,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:36:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:36:31,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:31,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101141347] [2021-05-02 14:36:31,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101141347] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:36:31,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:36:31,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:36:31,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057508603] [2021-05-02 14:36:31,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:36:31,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:31,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:36:31,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:36:31,894 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:36:31,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:31,955 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2021-05-02 14:36:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:36:31,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 14:36:31,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:31,962 INFO L225 Difference]: With dead ends: 51 [2021-05-02 14:36:31,962 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 14:36:31,964 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:36:31,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 14:36:31,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 14:36:31,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 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 14:36:31,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 14:36:31,996 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2021-05-02 14:36:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:31,996 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 14:36:31,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:36:31,996 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 14:36:31,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 14:36:31,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:31,997 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:31,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:36:31,998 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:31,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:31,999 INFO L82 PathProgramCache]: Analyzing trace with hash -73515422, now seen corresponding path program 1 times [2021-05-02 14:36:32,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:32,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132617857] [2021-05-02 14:36:32,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:32,028 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:32,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998880821] [2021-05-02 14:36:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:32,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 14:36:32,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:32,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:32,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:36:32,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:32,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132617857] [2021-05-02 14:36:32,267 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:32,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998880821] [2021-05-02 14:36:32,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998880821] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:36:32,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:36:32,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:36:32,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754823771] [2021-05-02 14:36:32,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:36:32,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:32,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:36:32,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:36:32,269 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:36:32,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:32,372 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-05-02 14:36:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:36:32,373 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-05-02 14:36:32,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:32,374 INFO L225 Difference]: With dead ends: 37 [2021-05-02 14:36:32,374 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 14:36:32,375 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:36:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 14:36:32,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 14:36:32,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 5 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 14:36:32,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-02 14:36:32,381 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2021-05-02 14:36:32,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:32,381 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-02 14:36:32,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:36:32,381 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-02 14:36:32,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 14:36:32,382 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:32,382 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] [2021-05-02 14:36:32,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:36:32,612 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:32,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:32,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1211706883, now seen corresponding path program 1 times [2021-05-02 14:36:32,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:32,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123573354] [2021-05-02 14:36:32,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:32,622 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:32,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61830324] [2021-05-02 14:36:32,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:32,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 14:36:32,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:32,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:32,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:36:32,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:32,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123573354] [2021-05-02 14:36:32,840 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:32,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61830324] [2021-05-02 14:36:32,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61830324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:32,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:32,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:36:32,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298237945] [2021-05-02 14:36:32,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:36:32,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:32,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:36:32,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:36:32,844 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:36:32,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:32,943 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-05-02 14:36:32,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:36:32,944 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-05-02 14:36:32,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:32,945 INFO L225 Difference]: With dead ends: 45 [2021-05-02 14:36:32,945 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 14:36:32,945 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:36:32,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 14:36:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 14:36:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 6 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 14:36:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-05-02 14:36:32,950 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2021-05-02 14:36:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:32,950 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-05-02 14:36:32,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:36:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-05-02 14:36:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 14:36:32,951 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:32,951 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:33,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:33,165 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:33,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:33,165 INFO L82 PathProgramCache]: Analyzing trace with hash 947727214, now seen corresponding path program 1 times [2021-05-02 14:36:33,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:33,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076718698] [2021-05-02 14:36:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:33,172 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:33,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448773116] [2021-05-02 14:36:33,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:33,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:36:33,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:36:33,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:33,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076718698] [2021-05-02 14:36:33,288 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:33,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448773116] [2021-05-02 14:36:33,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448773116] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:36:33,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:36:33,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:36:33,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483183029] [2021-05-02 14:36:33,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:36:33,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:33,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:36:33,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:36:33,290 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 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 14:36:33,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:33,321 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-05-02 14:36:33,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:36:33,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 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 27 [2021-05-02 14:36:33,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:33,322 INFO L225 Difference]: With dead ends: 53 [2021-05-02 14:36:33,322 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:36:33,323 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:36:33,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:36:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 14:36:33,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 5 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 14:36:33,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 14:36:33,327 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2021-05-02 14:36:33,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:33,327 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 14:36:33,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 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 14:36:33,327 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 14:36:33,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 14:36:33,328 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:33,328 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:33,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:33,533 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:33,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1574040585, now seen corresponding path program 1 times [2021-05-02 14:36:33,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:33,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139604911] [2021-05-02 14:36:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:33,541 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:33,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140519331] [2021-05-02 14:36:33,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:33,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 14:36:33,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:33,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:33,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:33,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:33,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:36:33,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:33,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139604911] [2021-05-02 14:36:33,724 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:33,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140519331] [2021-05-02 14:36:33,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140519331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:33,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:33,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:36:33,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619488459] [2021-05-02 14:36:33,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:36:33,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:33,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:36:33,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:36:33,725 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:33,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:33,852 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-05-02 14:36:33,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:36:33,853 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 14:36:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:33,853 INFO L225 Difference]: With dead ends: 58 [2021-05-02 14:36:33,853 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 14:36:33,854 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:36:33,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 14:36:33,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 14:36:33,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:36:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-05-02 14:36:33,868 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 29 [2021-05-02 14:36:33,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:33,868 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-05-02 14:36:33,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-05-02 14:36:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 14:36:33,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:33,870 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:34,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:34,073 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:34,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:34,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2129198620, now seen corresponding path program 2 times [2021-05-02 14:36:34,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:34,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104498937] [2021-05-02 14:36:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:34,081 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:34,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470566371] [2021-05-02 14:36:34,081 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:34,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:36:34,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:36:34,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 14:36:34,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:34,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:34,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:34,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:34,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:34,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:34,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:36:34,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:34,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104498937] [2021-05-02 14:36:34,307 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:34,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470566371] [2021-05-02 14:36:34,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470566371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:34,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:34,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:36:34,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369332511] [2021-05-02 14:36:34,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:36:34,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:34,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:36:34,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:36:34,308 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:34,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:34,517 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2021-05-02 14:36:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:36:34,517 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-05-02 14:36:34,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:34,519 INFO L225 Difference]: With dead ends: 85 [2021-05-02 14:36:34,519 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 14:36:34,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:36:34,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 14:36:34,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2021-05-02 14:36:34,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.205128205128205) internal successors, (47), 40 states have internal predecessors, (47), 8 states have call successors, (8), 7 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 14:36:34,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-05-02 14:36:34,525 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 31 [2021-05-02 14:36:34,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:34,525 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-05-02 14:36:34,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:34,526 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-05-02 14:36:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:36:34,526 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:34,526 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:34,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:36:34,727 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:34,727 INFO L82 PathProgramCache]: Analyzing trace with hash -414186241, now seen corresponding path program 3 times [2021-05-02 14:36:34,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:34,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879304505] [2021-05-02 14:36:34,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:34,735 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:34,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687233001] [2021-05-02 14:36:34,735 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:34,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 14:36:34,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:36:34,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 14:36:34,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:34,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:34,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:34,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:34,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:34,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:34,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:34,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:34,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:36:34,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:34,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879304505] [2021-05-02 14:36:34,972 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:34,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687233001] [2021-05-02 14:36:34,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687233001] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:34,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:34,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:36:34,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733651254] [2021-05-02 14:36:34,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:36:34,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:34,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:36:34,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:36:34,973 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:35,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:35,080 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-05-02 14:36:35,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:36:35,081 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2021-05-02 14:36:35,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:35,081 INFO L225 Difference]: With dead ends: 64 [2021-05-02 14:36:35,081 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 14:36:35,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:36:35,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 14:36:35,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2021-05-02 14:36:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 7 states have call successors, (7), 6 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 14:36:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-05-02 14:36:35,086 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2021-05-02 14:36:35,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:35,086 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-05-02 14:36:35,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:35,086 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-05-02 14:36:35,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 14:36:35,087 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:35,090 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:35,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:35,297 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:35,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:35,297 INFO L82 PathProgramCache]: Analyzing trace with hash -758101483, now seen corresponding path program 4 times [2021-05-02 14:36:35,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:35,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303246199] [2021-05-02 14:36:35,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:35,308 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:35,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134690294] [2021-05-02 14:36:35,308 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:35,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:36:35,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:36:35,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:36:35,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:35,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:35,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:35,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:35,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:35,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:35,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:35,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:35,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:36:35,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:35,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303246199] [2021-05-02 14:36:35,630 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:35,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134690294] [2021-05-02 14:36:35,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134690294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:35,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:35,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:36:35,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268188069] [2021-05-02 14:36:35,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:36:35,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:35,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:36:35,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:36:35,631 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:35,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:35,753 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2021-05-02 14:36:35,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:36:35,754 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2021-05-02 14:36:35,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:35,754 INFO L225 Difference]: With dead ends: 77 [2021-05-02 14:36:35,754 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 14:36:35,755 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:36:35,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 14:36:35,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 14:36:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 6 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 14:36:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-05-02 14:36:35,758 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 37 [2021-05-02 14:36:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:35,759 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-05-02 14:36:35,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:35,759 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-05-02 14:36:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 14:36:35,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:35,759 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:35,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:35,977 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:35,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:35,978 INFO L82 PathProgramCache]: Analyzing trace with hash 826494192, now seen corresponding path program 5 times [2021-05-02 14:36:35,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:35,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299534997] [2021-05-02 14:36:35,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:35,992 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:35,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130460337] [2021-05-02 14:36:35,992 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:36,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-02 14:36:36,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:36:36,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 14:36:36,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:36,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:36,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:36,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:36,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:36,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:36,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:36:36,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:36,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299534997] [2021-05-02 14:36:36,527 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:36,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130460337] [2021-05-02 14:36:36,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130460337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:36,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:36,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 14:36:36,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148783773] [2021-05-02 14:36:36,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 14:36:36,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:36,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 14:36:36,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:36:36,528 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:36,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:36,809 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2021-05-02 14:36:36,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 14:36:36,810 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 39 [2021-05-02 14:36:36,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:36,811 INFO L225 Difference]: With dead ends: 107 [2021-05-02 14:36:36,811 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 14:36:36,812 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:36:36,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 14:36:36,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2021-05-02 14:36:36,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 49 states have internal predecessors, (56), 10 states have call successors, (10), 8 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 14:36:36,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2021-05-02 14:36:36,818 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 39 [2021-05-02 14:36:36,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:36,818 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2021-05-02 14:36:36,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:36,818 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2021-05-02 14:36:36,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 14:36:36,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:36,819 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:37,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:36:37,024 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:37,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:37,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1090452213, now seen corresponding path program 6 times [2021-05-02 14:36:37,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:37,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525047519] [2021-05-02 14:36:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:37,031 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:37,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115781346] [2021-05-02 14:36:37,031 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 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