/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_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:27:36,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:27:36,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:27:36,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:27:36,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:27:36,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:27:36,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:27:36,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:27:36,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:27:36,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:27:36,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:27:36,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:27:36,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:27:36,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:27:36,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:27:36,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:27:36,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:27:36,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:27:36,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:27:36,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:27:36,821 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:27:36,849 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:27:36,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:27:36,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:27:36,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:27:36,853 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:27:36,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:27:36,853 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:27:36,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:27:36,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:27:36,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:27:36,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:27:36,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:27:36,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:27:36,854 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:27:36,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:27:36,855 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:27:36,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:27:36,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:27:36,855 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:27:36,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:27:36,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:27:36,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:27:36,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:27:36,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:27:36,856 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:27:36,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:27:36,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:27:36,856 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:27:36,856 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:27:37,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:27:37,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:27:37,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:27:37,123 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:27:37,124 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:27:37,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c [2021-05-02 15:27:37,168 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a653d461f/f39bc7a242e541d59eef75e0e08ab395/FLAG8363af417 [2021-05-02 15:27:37,517 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:27:37,517 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c [2021-05-02 15:27:37,522 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a653d461f/f39bc7a242e541d59eef75e0e08ab395/FLAG8363af417 [2021-05-02 15:27:37,536 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a653d461f/f39bc7a242e541d59eef75e0e08ab395 [2021-05-02 15:27:37,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:27:37,540 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:27:37,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:27:37,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:27:37,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:27:37,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:27:37" (1/1) ... [2021-05-02 15:27:37,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a8b9e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:27:37, skipping insertion in model container [2021-05-02 15:27:37,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:27:37" (1/1) ... [2021-05-02 15:27:37,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:27:37,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:27:37,685 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_valuebound10.c[546,559] [2021-05-02 15:27:37,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:27:37,709 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:27:37,725 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_valuebound10.c[546,559] [2021-05-02 15:27:37,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:27:37,759 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:27:37,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:27:37 WrapperNode [2021-05-02 15:27:37,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:27:37,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:27:37,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:27:37,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:27:37,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:27:37" (1/1) ... [2021-05-02 15:27:37,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:27:37" (1/1) ... [2021-05-02 15:27:37,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:27:37" (1/1) ... [2021-05-02 15:27:37,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:27:37" (1/1) ... [2021-05-02 15:27:37,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:27:37" (1/1) ... [2021-05-02 15:27:37,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:27:37" (1/1) ... [2021-05-02 15:27:37,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:27:37" (1/1) ... [2021-05-02 15:27:37,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:27:37,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:27:37,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:27:37,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:27:37,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:27:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:27:37,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:27:37,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:27:37,874 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:27:37,874 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:27:37,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:27:37,874 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:27:37,874 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:27:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:27:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:27:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:27:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:27:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:27:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:27:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:27:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:27:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:27:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:27:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:27:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:27:37,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:27:38,077 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:27:38,078 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:27:38,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:27:38 BoogieIcfgContainer [2021-05-02 15:27:38,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:27:38,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:27:38,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:27:38,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:27:38,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:27:37" (1/3) ... [2021-05-02 15:27:38,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ade1a02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:27:38, skipping insertion in model container [2021-05-02 15:27:38,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:27:37" (2/3) ... [2021-05-02 15:27:38,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ade1a02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:27:38, skipping insertion in model container [2021-05-02 15:27:38,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:27:38" (3/3) ... [2021-05-02 15:27:38,083 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound10.c [2021-05-02 15:27:38,086 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:27:38,088 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:27:38,098 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:27:38,111 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:27:38,111 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:27:38,111 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:27:38,111 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:27:38,111 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:27:38,112 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:27:38,112 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:27:38,112 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:27:38,121 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) [2021-05-02 15:27:38,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:27:38,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:27:38,130 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] [2021-05-02 15:27:38,130 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:27:38,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:27:38,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-02 15:27:38,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:27:38,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673943822] [2021-05-02 15:27:38,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:27:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:38,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:27:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:38,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:27:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:38,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:27:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:38,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:27:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:27:38,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:27:38,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673943822] [2021-05-02 15:27:38,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673943822] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:27:38,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:27:38,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:27:38,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477076911] [2021-05-02 15:27:38,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:27:38,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:27:38,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:27:38,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:27:38,372 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) [2021-05-02 15:27:38,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:27:38,528 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-02 15:27:38,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:27:38,529 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 [2021-05-02 15:27:38,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:27:38,534 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:27:38,534 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:27:38,536 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:27:38,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:27:38,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 15:27:38,571 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) [2021-05-02 15:27:38,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 15:27:38,573 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 15:27:38,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:27:38,573 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 15:27:38,574 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) [2021-05-02 15:27:38,574 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 15:27:38,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:27:38,575 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:27:38,575 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] [2021-05-02 15:27:38,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:27:38,575 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:27:38,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:27:38,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-02 15:27:38,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:27:38,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206788842] [2021-05-02 15:27:38,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:27:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:38,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:27:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:38,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:27:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:38,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:27:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:38,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:27:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:27:38,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:27:38,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206788842] [2021-05-02 15:27:38,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206788842] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:27:38,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:27:38,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:27:38,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833818157] [2021-05-02 15:27:38,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:27:38,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:27:38,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:27:38,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:27:38,724 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) [2021-05-02 15:27:38,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:27:38,985 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-02 15:27:38,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:27:38,985 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 [2021-05-02 15:27:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:27:38,987 INFO L225 Difference]: With dead ends: 46 [2021-05-02 15:27:38,987 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 15:27:38,988 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:27:38,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 15:27:39,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 15:27:39,005 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) [2021-05-02 15:27:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 15:27:39,008 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 15:27:39,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:27:39,010 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 15:27:39,011 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) [2021-05-02 15:27:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 15:27:39,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:27:39,012 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:27:39,016 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] [2021-05-02 15:27:39,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:27:39,016 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:27:39,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:27:39,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-02 15:27:39,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:27:39,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374695271] [2021-05-02 15:27:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:27:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:39,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:27:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:39,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:27:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:39,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:27:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:39,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:27:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:39,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 15:27:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:27:39,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:27:39,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374695271] [2021-05-02 15:27:39,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374695271] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:27:39,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:27:39,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:27:39,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898182476] [2021-05-02 15:27:39,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:27:39,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:27:39,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:27:39,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:27:39,162 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) [2021-05-02 15:27:39,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:27:39,404 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-02 15:27:39,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:27:39,404 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 [2021-05-02 15:27:39,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:27:39,405 INFO L225 Difference]: With dead ends: 50 [2021-05-02 15:27:39,405 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 15:27:39,405 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:27:39,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 15:27:39,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 15:27:39,410 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) [2021-05-02 15:27:39,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 15:27:39,411 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 15:27:39,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:27:39,411 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 15:27:39,411 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) [2021-05-02 15:27:39,411 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 15:27:39,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 15:27:39,412 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:27:39,412 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] [2021-05-02 15:27:39,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 15:27:39,412 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:27:39,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:27:39,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-02 15:27:39,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:27:39,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055059075] [2021-05-02 15:27:39,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:27:39,421 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:27:39,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521069457] [2021-05-02 15:27:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:27:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:39,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:27:39,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:27:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 15:27:39,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:27:39,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055059075] [2021-05-02 15:27:39,608 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:27:39,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521069457] [2021-05-02 15:27:39,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521069457] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:27:39,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:27:39,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:27:39,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942710351] [2021-05-02 15:27:39,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:27:39,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:27:39,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:27:39,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:27:39,609 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:27:39,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:27:39,804 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2021-05-02 15:27:39,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:27:39,805 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-02 15:27:39,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:27:39,806 INFO L225 Difference]: With dead ends: 73 [2021-05-02 15:27:39,806 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 15:27:39,806 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:27:39,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 15:27:39,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-02 15:27:39,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 15:27:39,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-05-02 15:27:39,823 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 38 [2021-05-02 15:27:39,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:27:39,823 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-05-02 15:27:39,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:27:39,823 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-05-02 15:27:39,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 15:27:39,824 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:27:39,824 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] [2021-05-02 15:27:40,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:27:40,040 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:27:40,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:27:40,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-02 15:27:40,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:27:40,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799751127] [2021-05-02 15:27:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:27:40,051 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:27:40,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350859555] [2021-05-02 15:27:40,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:27:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:40,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 15:27:40,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:27:40,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 15:27:40,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:27:40,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799751127] [2021-05-02 15:27:40,385 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:27:40,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350859555] [2021-05-02 15:27:40,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350859555] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:27:40,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:27:40,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 15:27:40,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774356591] [2021-05-02 15:27:40,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:27:40,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:27:40,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:27:40,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:27:40,388 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 10 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), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:27:40,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:27:40,527 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-02 15:27:40,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:27:40,528 INFO L78 Accepts]: Start accepts. Automaton has has 10 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), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 15:27:40,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:27:40,530 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:27:40,531 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 15:27:40,531 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:27:40,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 15:27:40,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 15:27:40,545 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) [2021-05-02 15:27:40,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 15:27:40,547 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-02 15:27:40,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:27:40,548 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 15:27:40,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 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), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:27:40,549 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 15:27:40,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 15:27:40,552 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:27:40,552 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] [2021-05-02 15:27:40,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:27:40,770 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:27:40,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:27:40,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-02 15:27:40,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:27:40,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678314498] [2021-05-02 15:27:40,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:27:40,777 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:27:40,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975860779] [2021-05-02 15:27:40,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:27:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:40,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 15:27:40,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:27:40,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:40,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 15:27:41,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:27:41,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678314498] [2021-05-02 15:27:41,016 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:27:41,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975860779] [2021-05-02 15:27:41,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975860779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:27:41,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:27:41,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:27:41,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263823317] [2021-05-02 15:27:41,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:27:41,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:27:41,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:27:41,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:27:41,018 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:27:41,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:27:41,242 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2021-05-02 15:27:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:27:41,243 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-02 15:27:41,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:27:41,246 INFO L225 Difference]: With dead ends: 95 [2021-05-02 15:27:41,248 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 15:27:41,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:27:41,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 15:27:41,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 15:27:41,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 47 states have (on average 1.127659574468085) internal successors, (53), 49 states have internal predecessors, (53), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 15:27:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2021-05-02 15:27:41,271 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 55 [2021-05-02 15:27:41,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:27:41,271 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2021-05-02 15:27:41,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:27:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2021-05-02 15:27:41,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 15:27:41,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:27:41,274 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] [2021-05-02 15:27:41,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:27:41,495 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:27:41,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:27:41,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1784683007, now seen corresponding path program 1 times [2021-05-02 15:27:41,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:27:41,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361009475] [2021-05-02 15:27:41,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:27:41,502 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:27:41,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247226865] [2021-05-02 15:27:41,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:27:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:41,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 15:27:41,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:27:41,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 15:27:41,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:27:41,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361009475] [2021-05-02 15:27:41,934 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:27:41,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247226865] [2021-05-02 15:27:41,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247226865] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:27:41,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:27:41,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:27:41,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286490920] [2021-05-02 15:27:41,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:27:41,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:27:41,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:27:41,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:27:41,936 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:27:42,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:27:42,190 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2021-05-02 15:27:42,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:27:42,191 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2021-05-02 15:27:42,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:27:42,191 INFO L225 Difference]: With dead ends: 91 [2021-05-02 15:27:42,191 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 15:27:42,202 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:27:42,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 15:27:42,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 15:27:42,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 52 states have internal predecessors, (56), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 15:27:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-05-02 15:27:42,217 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 62 [2021-05-02 15:27:42,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:27:42,218 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-05-02 15:27:42,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:27:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-05-02 15:27:42,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 15:27:42,220 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:27:42,220 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] [2021-05-02 15:27:42,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:27:42,434 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:27:42,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:27:42,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1254068366, now seen corresponding path program 2 times [2021-05-02 15:27:42,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:27:42,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124264719] [2021-05-02 15:27:42,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:27:42,441 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:27:42,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [822282562] [2021-05-02 15:27:42,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:27:42,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:27:42,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:27:42,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 15:27:42,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:27:42,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:42,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 50 proven. 21 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 15:27:43,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:27:43,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124264719] [2021-05-02 15:27:43,118 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:27:43,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822282562] [2021-05-02 15:27:43,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822282562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:27:43,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:27:43,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:27:43,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345088973] [2021-05-02 15:27:43,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:27:43,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:27:43,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:27:43,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:27:43,119 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 15:27:43,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:27:43,466 INFO L93 Difference]: Finished difference Result 125 states and 149 transitions. [2021-05-02 15:27:43,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:27:43,467 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 72 [2021-05-02 15:27:43,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:27:43,468 INFO L225 Difference]: With dead ends: 125 [2021-05-02 15:27:43,468 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 15:27:43,468 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 131.9ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:27:43,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 15:27:43,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-05-02 15:27:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 72 states have internal predecessors, (79), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 15:27:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2021-05-02 15:27:43,476 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 72 [2021-05-02 15:27:43,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:27:43,477 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2021-05-02 15:27:43,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 15:27:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2021-05-02 15:27:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 15:27:43,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:27:43,477 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] [2021-05-02 15:27:43,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 15:27:43,692 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:27:43,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:27:43,693 INFO L82 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2021-05-02 15:27:43,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:27:43,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098065561] [2021-05-02 15:27:43,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:27:43,700 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:27:43,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874226954] [2021-05-02 15:27:43,700 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 [2021-05-02 15:27:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:43,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 15:27:43,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:27:43,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-02 15:27:44,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:27:44,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098065561] [2021-05-02 15:27:44,017 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:27:44,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874226954] [2021-05-02 15:27:44,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874226954] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:27:44,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:27:44,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:27:44,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327241699] [2021-05-02 15:27:44,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:27:44,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:27:44,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:27:44,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:27:44,018 INFO L87 Difference]: Start difference. First operand 116 states and 136 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 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) [2021-05-02 15:27:44,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:27:44,216 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2021-05-02 15:27:44,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:27:44,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 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 75 [2021-05-02 15:27:44,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:27:44,218 INFO L225 Difference]: With dead ends: 129 [2021-05-02 15:27:44,218 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 15:27:44,218 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:27:44,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 15:27:44,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-05-02 15:27:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 76 states have (on average 1.144736842105263) internal successors, (87), 78 states have internal predecessors, (87), 32 states have call successors, (32), 17 states have call predecessors, (32), 16 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 15:27:44,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2021-05-02 15:27:44,227 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 75 [2021-05-02 15:27:44,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:27:44,227 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2021-05-02 15:27:44,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 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) [2021-05-02 15:27:44,227 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2021-05-02 15:27:44,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 15:27:44,228 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:27:44,228 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] [2021-05-02 15:27:44,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:27:44,441 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:27:44,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:27:44,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1211630783, now seen corresponding path program 2 times [2021-05-02 15:27:44,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:27:44,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979054974] [2021-05-02 15:27:44,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:27:44,453 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:27:44,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781272387] [2021-05-02 15:27:44,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:27:44,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:27:44,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:27:44,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 15:27:44,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:27:44,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 41 proven. 7 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-05-02 15:27:44,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:27:44,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979054974] [2021-05-02 15:27:44,688 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:27:44,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781272387] [2021-05-02 15:27:44,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781272387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:27:44,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:27:44,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:27:44,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541008246] [2021-05-02 15:27:44,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:27:44,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:27:44,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:27:44,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:27:44,690 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:27:44,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:27:44,808 INFO L93 Difference]: Finished difference Result 138 states and 165 transitions. [2021-05-02 15:27:44,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:27:44,808 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 79 [2021-05-02 15:27:44,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:27:44,809 INFO L225 Difference]: With dead ends: 138 [2021-05-02 15:27:44,809 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 15:27:44,810 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:27:44,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 15:27:44,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2021-05-02 15:27:44,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 82 states have (on average 1.146341463414634) internal successors, (94), 84 states have internal predecessors, (94), 34 states have call successors, (34), 18 states have call predecessors, (34), 17 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 15:27:44,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2021-05-02 15:27:44,820 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 79 [2021-05-02 15:27:44,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:27:44,821 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2021-05-02 15:27:44,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:27:44,821 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2021-05-02 15:27:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 15:27:44,824 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:27:44,824 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:27:45,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 15:27:45,033 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:27:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:27:45,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 2 times [2021-05-02 15:27:45,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:27:45,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836033464] [2021-05-02 15:27:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:27:45,038 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:27:45,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069690668] [2021-05-02 15:27:45,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:27:45,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:27:45,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:27:45,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 15:27:45,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:27:45,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-05-02 15:27:45,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:27:45,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836033464] [2021-05-02 15:27:45,363 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:27:45,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069690668] [2021-05-02 15:27:45,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069690668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:27:45,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:27:45,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:27:45,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584552392] [2021-05-02 15:27:45,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:27:45,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:27:45,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:27:45,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:27:45,365 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 15:27:45,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:27:45,509 INFO L93 Difference]: Finished difference Result 161 states and 194 transitions. [2021-05-02 15:27:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:27:45,509 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2021-05-02 15:27:45,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:27:45,511 INFO L225 Difference]: With dead ends: 161 [2021-05-02 15:27:45,511 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 15:27:45,511 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:27:45,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 15:27:45,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-05-02 15:27:45,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 84 states have (on average 1.119047619047619) internal successors, (94), 87 states have internal predecessors, (94), 35 states have call successors, (35), 19 states have call predecessors, (35), 18 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 15:27:45,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2021-05-02 15:27:45,520 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 80 [2021-05-02 15:27:45,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:27:45,520 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2021-05-02 15:27:45,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 15:27:45,521 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2021-05-02 15:27:45,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 15:27:45,521 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:27:45,521 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] [2021-05-02 15:27:45,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 15:27:45,737 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:27:45,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:27:45,738 INFO L82 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2021-05-02 15:27:45,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:27:45,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626413223] [2021-05-02 15:27:45,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:27:45,743 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:27:45,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671492759] [2021-05-02 15:27:45,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:27:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:27:45,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 15:27:45,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:27:45,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,300 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-02 15:27:46,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 72 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-05-02 15:27:46,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:27:46,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626413223] [2021-05-02 15:27:46,947 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:27:46,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671492759] [2021-05-02 15:27:46,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671492759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:27:46,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:27:46,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 15:27:46,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189923512] [2021-05-02 15:27:46,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 15:27:46,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:27:46,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 15:27:46,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:27:46,948 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 15:27:47,521 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-02 15:27:49,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:27:49,610 INFO L93 Difference]: Finished difference Result 144 states and 166 transitions. [2021-05-02 15:27:49,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 15:27:49,611 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2021-05-02 15:27:49,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:27:49,611 INFO L225 Difference]: With dead ends: 144 [2021-05-02 15:27:49,611 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 15:27:49,612 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 564.2ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-02 15:27:49,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 15:27:49,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-05-02 15:27:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 69 states have internal predecessors, (76), 30 states have call successors, (30), 15 states have call predecessors, (30), 14 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 15:27:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2021-05-02 15:27:49,620 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 86 [2021-05-02 15:27:49,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:27:49,620 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2021-05-02 15:27:49,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 15:27:49,620 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2021-05-02 15:27:49,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 15:27:49,620 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:27:49,620 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] [2021-05-02 15:27:49,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 15:27:49,836 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:27:49,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:27:49,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1094644914, now seen corresponding path program 3 times [2021-05-02 15:27:49,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:27:49,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675219155] [2021-05-02 15:27:49,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:27:49,841 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:27:49,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563480568] [2021-05-02 15:27:49,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:27:49,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:27:49,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:27:49,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 15:27:49,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:27:52,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:52,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 82 proven. 8 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-05-02 15:27:52,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:27:52,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675219155] [2021-05-02 15:27:52,621 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:27:52,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563480568] [2021-05-02 15:27:52,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563480568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:27:52,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:27:52,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:27:52,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363773251] [2021-05-02 15:27:52,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:27:52,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:27:52,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:27:52,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=68, Unknown=1, NotChecked=0, Total=90 [2021-05-02 15:27:52,623 INFO L87 Difference]: Start difference. First operand 112 states and 134 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 15:28:13,180 WARN L205 SmtUtils]: Spent 4.23 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 15:28:25,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:25,579 INFO L93 Difference]: Finished difference Result 137 states and 160 transitions. [2021-05-02 15:28:25,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:28:25,580 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 89 [2021-05-02 15:28:25,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:25,581 INFO L225 Difference]: With dead ends: 137 [2021-05-02 15:28:25,581 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 15:28:25,581 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 8856.5ms TimeCoverageRelationStatistics Valid=38, Invalid=116, Unknown=2, NotChecked=0, Total=156 [2021-05-02 15:28:25,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 15:28:25,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-05-02 15:28:25,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 77 states have internal predecessors, (83), 32 states have call successors, (32), 17 states have call predecessors, (32), 16 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 15:28:25,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 145 transitions. [2021-05-02 15:28:25,590 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 145 transitions. Word has length 89 [2021-05-02 15:28:25,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:25,590 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 145 transitions. [2021-05-02 15:28:25,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 15:28:25,590 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 145 transitions. [2021-05-02 15:28:25,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 15:28:25,590 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:25,591 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 15:28:25,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:25,791 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:25,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:25,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 3 times [2021-05-02 15:28:25,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:25,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618058914] [2021-05-02 15:28:25,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:25,796 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:28:25,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345924778] [2021-05-02 15:28:25,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:25,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:28:25,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:28:25,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 15:28:25,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:28:25,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:25,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:25,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:25,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:25,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:25,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:25,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:25,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:25,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:25,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:25,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:25,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 42 proven. 33 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 15:28:26,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:26,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618058914] [2021-05-02 15:28:26,178 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:28:26,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345924778] [2021-05-02 15:28:26,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345924778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:28:26,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:28:26,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:28:26,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92875917] [2021-05-02 15:28:26,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:28:26,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:26,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:28:26,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:28:26,180 INFO L87 Difference]: Start difference. First operand 123 states and 145 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-02 15:28:26,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:26,571 INFO L93 Difference]: Finished difference Result 166 states and 199 transitions. [2021-05-02 15:28:26,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:28:26,572 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 92 [2021-05-02 15:28:26,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:26,573 INFO L225 Difference]: With dead ends: 166 [2021-05-02 15:28:26,573 INFO L226 Difference]: Without dead ends: 139 [2021-05-02 15:28:26,575 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:28:26,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-02 15:28:26,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2021-05-02 15:28:26,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 87 states have internal predecessors, (95), 32 states have call successors, (32), 20 states have call predecessors, (32), 19 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 15:28:26,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2021-05-02 15:28:26,590 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 92 [2021-05-02 15:28:26,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:26,591 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2021-05-02 15:28:26,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-02 15:28:26,591 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2021-05-02 15:28:26,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 15:28:26,592 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:26,592 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:28:26,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 15:28:26,806 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:26,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:26,807 INFO L82 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 4 times [2021-05-02 15:28:26,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:26,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315800331] [2021-05-02 15:28:26,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:26,812 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:28:26,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617621659] [2021-05-02 15:28:26,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:26,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 15:28:26,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:28:26,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 15:28:26,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:28:26,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:26,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 41 proven. 40 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-05-02 15:28:27,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:27,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315800331] [2021-05-02 15:28:27,244 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:28:27,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617621659] [2021-05-02 15:28:27,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617621659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:28:27,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:28:27,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 15:28:27,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033494828] [2021-05-02 15:28:27,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 15:28:27,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:27,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 15:28:27,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:28:27,245 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 15:28:27,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:27,593 INFO L93 Difference]: Finished difference Result 153 states and 176 transitions. [2021-05-02 15:28:27,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:28:27,593 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 97 [2021-05-02 15:28:27,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:27,594 INFO L225 Difference]: With dead ends: 153 [2021-05-02 15:28:27,594 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 15:28:27,594 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 219.7ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-02 15:28:27,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 15:28:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 15:28:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 92 states have internal predecessors, (100), 34 states have call successors, (34), 21 states have call predecessors, (34), 20 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 15:28:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2021-05-02 15:28:27,602 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 97 [2021-05-02 15:28:27,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:27,602 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2021-05-02 15:28:27,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 15:28:27,602 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2021-05-02 15:28:27,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 15:28:27,603 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:27,603 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:28:27,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 15:28:27,829 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:27,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:27,830 INFO L82 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 5 times [2021-05-02 15:28:27,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:27,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235178320] [2021-05-02 15:28:27,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:27,835 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:28:27,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592112892] [2021-05-02 15:28:27,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:28,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 15:28:28,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:28:28,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 15:28:28,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:28:28,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 52 proven. 40 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-05-02 15:28:28,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:28,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235178320] [2021-05-02 15:28:28,458 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:28:28,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592112892] [2021-05-02 15:28:28,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592112892] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:28:28,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:28:28,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 15:28:28,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106256128] [2021-05-02 15:28:28,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 15:28:28,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:28,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 15:28:28,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:28:28,459 INFO L87 Difference]: Start difference. First operand 145 states and 166 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 15:28:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:28,980 INFO L93 Difference]: Finished difference Result 180 states and 214 transitions. [2021-05-02 15:28:28,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 15:28:28,980 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-02 15:28:28,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:28,981 INFO L225 Difference]: With dead ends: 180 [2021-05-02 15:28:28,981 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 15:28:28,982 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 248.6ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 15:28:28,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 15:28:28,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2021-05-02 15:28:28,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 96 states have internal predecessors, (104), 34 states have call successors, (34), 22 states have call predecessors, (34), 21 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 15:28:28,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2021-05-02 15:28:28,992 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 105 [2021-05-02 15:28:28,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:28,993 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2021-05-02 15:28:28,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 15:28:28,993 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2021-05-02 15:28:28,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 15:28:28,993 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:28,993 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:28:29,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 15:28:29,213 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:29,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:29,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2055944765, now seen corresponding path program 1 times [2021-05-02 15:28:29,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:29,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301580322] [2021-05-02 15:28:29,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:29,227 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:28:29,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236437774] [2021-05-02 15:28:29,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:29,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:28:29,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:28:29,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:29,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:41,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:41,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301580322] [2021-05-02 15:31:41,919 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:41,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236437774] [2021-05-02 15:31:41,920 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: -1239324874 [2021-05-02 15:31:41,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:31:41,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-05-02 15:31:41,920 ERROR L212 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-05-02 15:31:41,920 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:31:42,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:42,139 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-02 15:31:42,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:31:42 BoogieIcfgContainer [2021-05-02 15:31:42,139 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:31:42,139 INFO L168 Benchmark]: Toolchain (without parser) took 244599.78 ms. Allocated memory was 182.5 MB in the beginning and 5.9 GB in the end (delta: 5.7 GB). Free memory was 147.5 MB in the beginning and 5.1 GB in the end (delta: -5.0 GB). Peak memory consumption was 4.2 GB. Max. memory is 8.0 GB. [2021-05-02 15:31:42,142 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 182.5 MB. Free memory is still 163.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:31:42,142 INFO L168 Benchmark]: CACSL2BoogieTranslator took 217.88 ms. Allocated memory is still 182.5 MB. Free memory was 147.3 MB in the beginning and 165.0 MB in the end (delta: -17.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:31:42,142 INFO L168 Benchmark]: Boogie Preprocessor took 44.31 ms. Allocated memory is still 182.5 MB. Free memory was 164.4 MB in the beginning and 163.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:31:42,142 INFO L168 Benchmark]: RCFGBuilder took 273.05 ms. Allocated memory is still 182.5 MB. Free memory was 163.4 MB in the beginning and 147.1 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:31:42,143 INFO L168 Benchmark]: TraceAbstraction took 244059.33 ms. Allocated memory was 182.5 MB in the beginning and 5.9 GB in the end (delta: 5.7 GB). Free memory was 147.1 MB in the beginning and 5.1 GB in the end (delta: -5.0 GB). Peak memory consumption was 4.2 GB. Max. memory is 8.0 GB. [2021-05-02 15:31:42,143 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 182.5 MB. Free memory is still 163.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 217.88 ms. Allocated memory is still 182.5 MB. Free memory was 147.3 MB in the beginning and 165.0 MB in the end (delta: -17.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.31 ms. Allocated memory is still 182.5 MB. Free memory was 164.4 MB in the beginning and 163.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 273.05 ms. Allocated memory is still 182.5 MB. Free memory was 163.4 MB in the beginning and 147.1 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 244059.33 ms. Allocated memory was 182.5 MB in the beginning and 5.9 GB in the end (delta: 5.7 GB). Free memory was 147.1 MB in the beginning and 5.1 GB in the end (delta: -5.0 GB). Peak memory consumption was 4.2 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L23] unsigned int A, B; [L24] long long r, d, p, q; [L25] A = __VERIFIER_nondet_unsigned_int() [L26] CALL assume_abort_if_not(A>=0 && A<=10) [L12] COND FALSE !(!cond) [L26] RET assume_abort_if_not(A>=0 && A<=10) [L27] B = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(B>=0 && B<=10) [L12] COND FALSE !(!cond) [L28] RET assume_abort_if_not(B>=0 && B<=10) [L29] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) [L29] RET assume_abort_if_not(B >= 1) [L31] r = A [L32] d = B [L33] p = 1 [L34] q = 0 [L36] COND TRUE 1 [L37] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(q == 0) [L38] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r == A) [L39] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(d == B * p) [L40] COND FALSE !(!(r >= d)) [L42] d = 2 * d [L43] p = 2 * p [L36] COND TRUE 1 [L37] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(q == 0) [L38] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r == A) [L39] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(d == B * p) [L40] COND FALSE !(!(r >= d)) [L42] d = 2 * d [L43] p = 2 * p [L36] COND TRUE 1 [L37] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(q == 0) [L38] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r == A) [L39] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(d == B * p) [L40] COND TRUE !(r >= d) [L46] COND TRUE 1 [L47] CALL __VERIFIER_assert(A == q*B + r) [L15] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(A == q*B + r) [L48] CALL __VERIFIER_assert(d == B*p) [L15] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(d == B*p) [L50] COND FALSE !(!(p != 1)) [L52] d = d / 2 [L53] p = p / 2 [L54] COND FALSE !(r >= d) [L46] COND TRUE 1 [L47] CALL __VERIFIER_assert(A == q*B + r) [L15] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(A == q*B + r) [L48] CALL __VERIFIER_assert(d == B*p) [L15] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(d == B*p) [L50] COND FALSE !(!(p != 1)) [L52] d = d / 2 [L53] p = p / 2 [L54] COND TRUE r >= d [L55] r = r - d [L56] q = q + p [L46] COND TRUE 1 [L47] CALL __VERIFIER_assert(A == q*B + r) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 244018.3ms, OverallIterations: 17, TraceHistogramMax: 14, EmptinessCheckTime: 23.5ms, AutomataDifference: 39219.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 594 SDtfs, 511 SDslu, 3048 SDs, 0 SdLazy, 4152 SolverSat, 457 SolverUnsat, 14 SolverUnknown, 0 SolverNotchecked, 30896.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1050 GetRequests, 858 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 11093.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=150occurred in iteration=16, InterpolantAutomatonStates: 171, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 207.7ms AutomataMinimizationTime, 16 MinimizatonAttempts, 23 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 114.2ms SsaConstructionTime, 511.6ms SatisfiabilityAnalysisTime, 7753.1ms InterpolantComputationTime, 1064 NumberOfCodeBlocks, 1000 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1048 ConstructedInterpolants, 0 QuantifiedInterpolants, 6011 SizeOfPredicates, 63 NumberOfNonLiveVariables, 2612 ConjunctsInSsa, 403 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 2187/2379 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...