/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:12:58,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:12:58,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:12:58,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:12:58,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:12:58,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:12:58,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:12:58,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:12:58,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:12:58,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:12:58,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:12:58,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:12:58,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:12:58,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:12:58,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:12:58,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:12:58,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:12:58,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:12:58,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:12:58,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:12:58,505 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 03:12:58,545 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:12:58,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:12:58,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:12:58,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:12:58,548 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:12:58,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:12:58,548 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:12:58,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:12:58,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:12:58,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:12:58,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:12:58,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:12:58,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:12:58,549 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:12:58,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:12:58,550 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:12:58,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:12:58,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:12:58,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:12:58,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:12:58,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:12:58,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:12:58,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:12:58,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:12:58,550 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:12:58,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:12:58,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:12:58,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:12:58,551 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:12:58,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:12:58,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:12:58,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:12:58,842 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:12:58,843 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:12:58,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound100.c [2021-05-06 03:12:58,894 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/648affa10/da8d7deef13f4d57b8cc743164b1239f/FLAG3c05378da [2021-05-06 03:12:59,557 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:12:59,558 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound100.c [2021-05-06 03:12:59,563 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/648affa10/da8d7deef13f4d57b8cc743164b1239f/FLAG3c05378da [2021-05-06 03:12:59,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/648affa10/da8d7deef13f4d57b8cc743164b1239f [2021-05-06 03:12:59,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:12:59,921 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:12:59,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:12:59,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:12:59,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:12:59,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:12:59" (1/1) ... [2021-05-06 03:12:59,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@315e3776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:12:59, skipping insertion in model container [2021-05-06 03:12:59,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:12:59" (1/1) ... [2021-05-06 03:12:59,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:12:59,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:13:00,040 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound100.c[546,559] [2021-05-06 03:13:00,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:13:00,064 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:13:00,071 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound100.c[546,559] [2021-05-06 03:13:00,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:13:00,105 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:13:00,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:00 WrapperNode [2021-05-06 03:13:00,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:13:00,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:13:00,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:13:00,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:13:00,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:00" (1/1) ... [2021-05-06 03:13:00,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:00" (1/1) ... [2021-05-06 03:13:00,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:00" (1/1) ... [2021-05-06 03:13:00,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:00" (1/1) ... [2021-05-06 03:13:00,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:00" (1/1) ... [2021-05-06 03:13:00,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:00" (1/1) ... [2021-05-06 03:13:00,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:00" (1/1) ... [2021-05-06 03:13:00,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:13:00,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:13:00,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:13:00,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:13:00,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:13:00,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:13:00,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:13:00,222 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:13:00,222 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:13:00,222 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:13:00,222 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:13:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:13:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:13:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:13:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:13:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:13:00,224 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:13:00,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:13:00,224 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:13:00,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:13:00,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:13:00,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:13:00,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:13:00,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:13:00,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:13:00,453 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:13:00,453 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:13:00,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:13:00 BoogieIcfgContainer [2021-05-06 03:13:00,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:13:00,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:13:00,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:13:00,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:13:00,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:12:59" (1/3) ... [2021-05-06 03:13:00,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56833125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:13:00, skipping insertion in model container [2021-05-06 03:13:00,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:00" (2/3) ... [2021-05-06 03:13:00,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56833125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:13:00, skipping insertion in model container [2021-05-06 03:13:00,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:13:00" (3/3) ... [2021-05-06 03:13:00,462 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound100.c [2021-05-06 03:13:00,465 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:13:00,467 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:13:00,480 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:13:00,494 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:13:00,495 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:13:00,495 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:13:00,495 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:13:00,495 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:13:00,495 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:13:00,495 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:13:00,495 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:13:00,505 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 03:13:00,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:13:00,509 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:00,509 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:00,509 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:00,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:00,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-06 03:13:00,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:00,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721187045] [2021-05-06 03:13:00,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:00,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:13:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:00,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:13:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:00,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:13:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:00,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:13:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:13:00,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:00,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721187045] [2021-05-06 03:13:00,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721187045] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:13:00,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:13:00,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:13:00,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456504746] [2021-05-06 03:13:00,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:13:00,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:00,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:13:00,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:13:00,752 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:13:00,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:00,914 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-06 03:13:00,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:13:00,916 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 03:13:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:00,920 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:13:00,920 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:13:00,922 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:13:00,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:13:00,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 03:13:00,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:13:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 03:13:00,966 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 03:13:00,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:00,966 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 03:13:00,966 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:13:00,966 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 03:13:00,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:13:00,967 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:00,968 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:00,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:13:00,968 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:00,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:00,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-06 03:13:00,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:00,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481699173] [2021-05-06 03:13:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:01,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:13:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:01,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:13:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:01,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:13:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:01,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:13:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:13:01,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:01,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481699173] [2021-05-06 03:13:01,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481699173] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:13:01,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:13:01,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:13:01,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788211622] [2021-05-06 03:13:01,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:13:01,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:01,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:13:01,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:13:01,082 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:13:01,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:01,354 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-06 03:13:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:13:01,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 03:13:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:01,355 INFO L225 Difference]: With dead ends: 46 [2021-05-06 03:13:01,356 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 03:13:01,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:13:01,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 03:13:01,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 03:13:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:13:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 03:13:01,365 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 03:13:01,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:01,366 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 03:13:01,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:13:01,366 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 03:13:01,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 03:13:01,367 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:01,367 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:01,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:13:01,367 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:01,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:01,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-06 03:13:01,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:01,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993503353] [2021-05-06 03:13:01,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:01,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:13:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:01,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:13:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:01,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:13:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:01,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:13:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:01,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 03:13:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:13:01,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:01,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993503353] [2021-05-06 03:13:01,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993503353] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:13:01,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:13:01,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:13:01,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882429963] [2021-05-06 03:13:01,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:13:01,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:01,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:13:01,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:13:01,481 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:13:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:01,729 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-06 03:13:01,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:13:01,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 03:13:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:01,732 INFO L225 Difference]: With dead ends: 50 [2021-05-06 03:13:01,732 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 03:13:01,732 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:13:01,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 03:13:01,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 03:13:01,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:13:01,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 03:13:01,748 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 03:13:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:01,749 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 03:13:01,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:13:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 03:13:01,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 03:13:01,751 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:01,751 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:01,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 03:13:01,751 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:01,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:01,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-06 03:13:01,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:01,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702828433] [2021-05-06 03:13:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:01,770 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:13:01,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241913580] [2021-05-06 03:13:01,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:01,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:13:01,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:13:02,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 03:13:02,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:02,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702828433] [2021-05-06 03:13:02,044 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:13:02,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241913580] [2021-05-06 03:13:02,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241913580] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:13:02,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:13:02,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:13:02,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963457740] [2021-05-06 03:13:02,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:13:02,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:02,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:13:02,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:13:02,046 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 03:13:02,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:02,108 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2021-05-06 03:13:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:13:02,108 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-05-06 03:13:02,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:02,110 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:13:02,110 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 03:13:02,111 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:13:02,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 03:13:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 03:13:02,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 03:13:02,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-06 03:13:02,125 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-06 03:13:02,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:02,126 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-06 03:13:02,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 03:13:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-06 03:13:02,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 03:13:02,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:02,129 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:02,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:02,341 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:02,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:02,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-06 03:13:02,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:02,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286944970] [2021-05-06 03:13:02,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:02,348 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:13:02,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844759837] [2021-05-06 03:13:02,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:02,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 03:13:02,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:13:02,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:02,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:02,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:02,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:02,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:02,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:02,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:02,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:02,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:02,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:02,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:02,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-06 03:13:02,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:02,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286944970] [2021-05-06 03:13:02,654 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:13:02,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844759837] [2021-05-06 03:13:02,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844759837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:13:02,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:13:02,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:13:02,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486978007] [2021-05-06 03:13:02,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:13:02,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:02,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:13:02,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:13:02,656 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:13:02,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:02,780 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-06 03:13:02,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:13:02,780 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-06 03:13:02,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:02,783 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:13:02,783 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 03:13:02,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:13:02,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 03:13:02,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 03:13:02,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:13:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-06 03:13:02,793 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-06 03:13:02,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:02,794 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-06 03:13:02,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:13:02,794 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-06 03:13:02,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 03:13:02,797 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:02,797 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:03,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:03,016 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:03,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:03,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-06 03:13:03,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:03,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953150845] [2021-05-06 03:13:03,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:03,022 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:13:03,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513027296] [2021-05-06 03:13:03,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:03,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 03:13:03,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:13:03,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-06 03:13:03,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:03,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953150845] [2021-05-06 03:13:03,248 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:13:03,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513027296] [2021-05-06 03:13:03,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513027296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:13:03,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:13:03,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:13:03,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676596495] [2021-05-06 03:13:03,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:13:03,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:03,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:13:03,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:13:03,249 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 03:13:03,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:03,426 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2021-05-06 03:13:03,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:13:03,426 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2021-05-06 03:13:03,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:03,427 INFO L225 Difference]: With dead ends: 91 [2021-05-06 03:13:03,427 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 03:13:03,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:13:03,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 03:13:03,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 03:13:03,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 03:13:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2021-05-06 03:13:03,437 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 55 [2021-05-06 03:13:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:03,437 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2021-05-06 03:13:03,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 03:13:03,438 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2021-05-06 03:13:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 03:13:03,438 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:03,438 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:03,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:03,653 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:03,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:03,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1784683007, now seen corresponding path program 1 times [2021-05-06 03:13:03,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:03,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172987024] [2021-05-06 03:13:03,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:03,659 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:13:03,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006983725] [2021-05-06 03:13:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:03,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 03:13:03,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:13:03,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:03,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-06 03:13:04,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:04,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172987024] [2021-05-06 03:13:04,028 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:13:04,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006983725] [2021-05-06 03:13:04,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006983725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:13:04,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:13:04,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:13:04,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733428790] [2021-05-06 03:13:04,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:13:04,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:04,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:13:04,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:13:04,031 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:13:04,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:04,210 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2021-05-06 03:13:04,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:13:04,211 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2021-05-06 03:13:04,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:04,213 INFO L225 Difference]: With dead ends: 96 [2021-05-06 03:13:04,214 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 03:13:04,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 03:13:04,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 03:13:04,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-06 03:13:04,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 03:13:04,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2021-05-06 03:13:04,236 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 62 [2021-05-06 03:13:04,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:04,236 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2021-05-06 03:13:04,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:13:04,237 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2021-05-06 03:13:04,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 03:13:04,240 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:04,240 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:04,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:04,453 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:04,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:04,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1254068366, now seen corresponding path program 2 times [2021-05-06 03:13:04,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:04,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807607795] [2021-05-06 03:13:04,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:04,459 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:13:04,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1416961589] [2021-05-06 03:13:04,460 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 [2021-05-06 03:13:04,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:13:04,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:13:04,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 03:13:04,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:13:04,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-06 03:13:04,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:04,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807607795] [2021-05-06 03:13:04,691 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:13:04,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416961589] [2021-05-06 03:13:04,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416961589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:13:04,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:13:04,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:13:04,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673520902] [2021-05-06 03:13:04,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:13:04,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:04,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:13:04,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:13:04,692 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 03:13:04,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:04,893 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2021-05-06 03:13:04,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:13:04,894 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 72 [2021-05-06 03:13:04,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:04,895 INFO L225 Difference]: With dead ends: 127 [2021-05-06 03:13:04,895 INFO L226 Difference]: Without dead ends: 113 [2021-05-06 03:13:04,895 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:13:04,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-06 03:13:04,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-05-06 03:13:04,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 65 states have (on average 1.123076923076923) internal successors, (73), 68 states have internal predecessors, (73), 32 states have call successors, (32), 14 states have call predecessors, (32), 13 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 03:13:04,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2021-05-06 03:13:04,906 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 72 [2021-05-06 03:13:04,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:04,906 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2021-05-06 03:13:04,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 03:13:04,906 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2021-05-06 03:13:04,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 03:13:04,907 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:04,907 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:05,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:05,123 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:05,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:05,123 INFO L82 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2021-05-06 03:13:05,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:05,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412933345] [2021-05-06 03:13:05,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:05,129 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:13:05,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952209397] [2021-05-06 03:13:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:05,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 03:13:05,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:13:05,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:05,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:05,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:05,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:05,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:05,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:05,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:05,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:05,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:05,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:05,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:05,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:05,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:05,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:05,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:05,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:05,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:05,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:05,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 42 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-05-06 03:13:05,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:05,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412933345] [2021-05-06 03:13:05,532 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:13:05,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952209397] [2021-05-06 03:13:05,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952209397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:13:05,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:13:05,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 03:13:05,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447441384] [2021-05-06 03:13:05,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 03:13:05,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:05,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 03:13:05,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-06 03:13:05,535 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 03:13:05,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:05,797 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2021-05-06 03:13:05,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 03:13:05,798 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-06 03:13:05,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:05,798 INFO L225 Difference]: With dead ends: 123 [2021-05-06 03:13:05,799 INFO L226 Difference]: Without dead ends: 121 [2021-05-06 03:13:05,799 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-06 03:13:05,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-06 03:13:05,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2021-05-06 03:13:05,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 74 states have internal predecessors, (79), 32 states have call successors, (32), 16 states have call predecessors, (32), 15 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 03:13:05,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2021-05-06 03:13:05,808 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 75 [2021-05-06 03:13:05,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:05,808 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2021-05-06 03:13:05,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 03:13:05,808 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2021-05-06 03:13:05,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 03:13:05,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:05,809 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:06,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:06,027 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:06,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:06,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1211630783, now seen corresponding path program 2 times [2021-05-06 03:13:06,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:06,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471199130] [2021-05-06 03:13:06,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:06,034 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:13:06,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225231104] [2021-05-06 03:13:06,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:06,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:13:06,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:13:06,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 03:13:06,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:13:06,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-05-06 03:13:06,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:06,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471199130] [2021-05-06 03:13:06,504 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:13:06,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225231104] [2021-05-06 03:13:06,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225231104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:13:06,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:13:06,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 03:13:06,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923236696] [2021-05-06 03:13:06,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 03:13:06,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:06,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 03:13:06,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:13:06,505 INFO L87 Difference]: Start difference. First operand 119 states and 140 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 03:13:06,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:06,866 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2021-05-06 03:13:06,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 03:13:06,866 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-06 03:13:06,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:06,868 INFO L225 Difference]: With dead ends: 143 [2021-05-06 03:13:06,868 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 03:13:06,868 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-05-06 03:13:06,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 03:13:06,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-05-06 03:13:06,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 86 states have internal predecessors, (91), 34 states have call successors, (34), 19 states have call predecessors, (34), 18 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 03:13:06,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 156 transitions. [2021-05-06 03:13:06,878 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 156 transitions. Word has length 79 [2021-05-06 03:13:06,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:06,878 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 156 transitions. [2021-05-06 03:13:06,879 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 03:13:06,879 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 156 transitions. [2021-05-06 03:13:06,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 03:13:06,879 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:06,879 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:07,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 03:13:07,080 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:07,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:07,081 INFO L82 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2021-05-06 03:13:07,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:07,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311876157] [2021-05-06 03:13:07,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:07,086 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:13:07,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489762696] [2021-05-06 03:13:07,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:07,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 03:13:07,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:13:07,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-05-06 03:13:07,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:07,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311876157] [2021-05-06 03:13:07,263 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:13:07,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489762696] [2021-05-06 03:13:07,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489762696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:13:07,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:13:07,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:13:07,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105898162] [2021-05-06 03:13:07,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:13:07,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:07,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:13:07,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:13:07,264 INFO L87 Difference]: Start difference. First operand 136 states and 156 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 03:13:07,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:07,362 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2021-05-06 03:13:07,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:13:07,362 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 86 [2021-05-06 03:13:07,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:07,363 INFO L225 Difference]: With dead ends: 160 [2021-05-06 03:13:07,363 INFO L226 Difference]: Without dead ends: 135 [2021-05-06 03:13:07,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:13:07,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-06 03:13:07,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2021-05-06 03:13:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 83 states have internal predecessors, (89), 36 states have call successors, (36), 17 states have call predecessors, (36), 16 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:13:07,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 157 transitions. [2021-05-06 03:13:07,373 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 157 transitions. Word has length 86 [2021-05-06 03:13:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:07,373 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 157 transitions. [2021-05-06 03:13:07,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 03:13:07,374 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 157 transitions. [2021-05-06 03:13:07,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 03:13:07,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:07,374 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:07,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 03:13:07,589 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:07,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:07,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1094644914, now seen corresponding path program 3 times [2021-05-06 03:13:07,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:07,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070031882] [2021-05-06 03:13:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:07,595 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:13:07,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621510439] [2021-05-06 03:13:07,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:07,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 03:13:07,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:13:07,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 03:13:07,659 INFO L286 TraceCheckSpWp]: Computing forward predicates...