/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/loop-acceleration/array_4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 12:04:36,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 12:04:36,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 12:04:36,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 12:04:36,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 12:04:36,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 12:04:36,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 12:04:36,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 12:04:36,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 12:04:36,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 12:04:36,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 12:04:36,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 12:04:36,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 12:04:36,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 12:04:36,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 12:04:36,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 12:04:36,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 12:04:36,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 12:04:36,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 12:04:36,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 12:04:36,388 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 12:04:36,416 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 12:04:36,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 12:04:36,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 12:04:36,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 12:04:36,419 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 12:04:36,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 12:04:36,419 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 12:04:36,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 12:04:36,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 12:04:36,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 12:04:36,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 12:04:36,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 12:04:36,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 12:04:36,420 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 12:04:36,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 12:04:36,421 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 12:04:36,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 12:04:36,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 12:04:36,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 12:04:36,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 12:04:36,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:04:36,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 12:04:36,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 12:04:36,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 12:04:36,422 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 12:04:36,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 12:04:36,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 12:04:36,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 12:04:36,422 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 12:04:36,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 12:04:36,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 12:04:36,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 12:04:36,722 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 12:04:36,723 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 12:04:36,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_4.i [2021-05-02 12:04:36,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec75cc2c0/8b1b8bc9da5a4c0b85b034f55e008055/FLAG67ee440e9 [2021-05-02 12:04:37,116 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 12:04:37,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i [2021-05-02 12:04:37,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec75cc2c0/8b1b8bc9da5a4c0b85b034f55e008055/FLAG67ee440e9 [2021-05-02 12:04:37,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec75cc2c0/8b1b8bc9da5a4c0b85b034f55e008055 [2021-05-02 12:04:37,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 12:04:37,532 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 12:04:37,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 12:04:37,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 12:04:37,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 12:04:37,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:04:37" (1/1) ... [2021-05-02 12:04:37,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ed59a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:37, skipping insertion in model container [2021-05-02 12:04:37,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:04:37" (1/1) ... [2021-05-02 12:04:37,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 12:04:37,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 12:04:37,674 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i[848,861] [2021-05-02 12:04:37,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:04:37,689 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 12:04:37,732 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i[848,861] [2021-05-02 12:04:37,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:04:37,756 INFO L208 MainTranslator]: Completed translation [2021-05-02 12:04:37,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:37 WrapperNode [2021-05-02 12:04:37,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 12:04:37,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 12:04:37,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 12:04:37,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 12:04:37,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:37" (1/1) ... [2021-05-02 12:04:37,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:37" (1/1) ... [2021-05-02 12:04:37,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:37" (1/1) ... [2021-05-02 12:04:37,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:37" (1/1) ... [2021-05-02 12:04:37,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:37" (1/1) ... [2021-05-02 12:04:37,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:37" (1/1) ... [2021-05-02 12:04:37,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:37" (1/1) ... [2021-05-02 12:04:37,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 12:04:37,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 12:04:37,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 12:04:37,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 12:04:37,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:37" (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 12:04:37,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 12:04:37,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 12:04:37,852 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 12:04:37,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 12:04:37,853 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 12:04:37,853 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 12:04:37,853 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 12:04:37,853 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 12:04:37,853 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 12:04:37,853 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 12:04:37,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 12:04:37,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 12:04:37,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 12:04:37,854 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 12:04:37,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 12:04:37,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 12:04:37,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 12:04:37,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 12:04:37,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 12:04:37,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 12:04:38,030 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 12:04:38,030 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 12:04:38,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:04:38 BoogieIcfgContainer [2021-05-02 12:04:38,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 12:04:38,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 12:04:38,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 12:04:38,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 12:04:38,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 12:04:37" (1/3) ... [2021-05-02 12:04:38,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6e0bac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:04:38, skipping insertion in model container [2021-05-02 12:04:38,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:37" (2/3) ... [2021-05-02 12:04:38,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6e0bac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:04:38, skipping insertion in model container [2021-05-02 12:04:38,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:04:38" (3/3) ... [2021-05-02 12:04:38,036 INFO L111 eAbstractionObserver]: Analyzing ICFG array_4.i [2021-05-02 12:04:38,040 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 12:04:38,042 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 12:04:38,053 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 12:04:38,067 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 12:04:38,067 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 12:04:38,067 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 12:04:38,067 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 12:04:38,068 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 12:04:38,068 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 12:04:38,068 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 12:04:38,068 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 12:04:38,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 12:04:38,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 12:04:38,081 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:38,081 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:38,081 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:38,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:38,085 INFO L82 PathProgramCache]: Analyzing trace with hash -615726646, now seen corresponding path program 1 times [2021-05-02 12:04:38,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:38,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093993500] [2021-05-02 12:04:38,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:38,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:38,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:38,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093993500] [2021-05-02 12:04:38,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093993500] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:04:38,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:04:38,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 12:04:38,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632875940] [2021-05-02 12:04:38,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 12:04:38,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:38,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 12:04:38,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:04:38,225 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:38,272 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-05-02 12:04:38,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 12:04:38,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 12:04:38,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:38,280 INFO L225 Difference]: With dead ends: 40 [2021-05-02 12:04:38,280 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 12:04:38,283 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:04:38,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 12:04:38,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 12:04:38,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-05-02 12:04:38,309 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-05-02 12:04:38,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:38,309 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-05-02 12:04:38,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,310 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-05-02 12:04:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 12:04:38,311 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:38,311 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:38,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 12:04:38,311 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:38,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:38,315 INFO L82 PathProgramCache]: Analyzing trace with hash 238110415, now seen corresponding path program 1 times [2021-05-02 12:04:38,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:38,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125782013] [2021-05-02 12:04:38,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:38,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:38,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:38,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125782013] [2021-05-02 12:04:38,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125782013] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:04:38,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:04:38,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 12:04:38,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850023016] [2021-05-02 12:04:38,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 12:04:38,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:38,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 12:04:38,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 12:04:38,453 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:38,515 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-02 12:04:38,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 12:04:38,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 12:04:38,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:38,517 INFO L225 Difference]: With dead ends: 32 [2021-05-02 12:04:38,517 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 12:04:38,518 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 12:04:38,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 12:04:38,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2021-05-02 12:04:38,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-05-02 12:04:38,522 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2021-05-02 12:04:38,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:38,523 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-05-02 12:04:38,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,523 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-05-02 12:04:38,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 12:04:38,523 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:38,523 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:38,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 12:04:38,524 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:38,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:38,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1502803825, now seen corresponding path program 1 times [2021-05-02 12:04:38,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:38,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048037694] [2021-05-02 12:04:38,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:38,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:38,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:38,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048037694] [2021-05-02 12:04:38,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048037694] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:38,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568377088] [2021-05-02 12:04:38,620 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 12:04:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:38,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 12:04:38,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:38,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:38,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568377088] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:38,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:38,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 12:04:38,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718200243] [2021-05-02 12:04:38,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 12:04:38,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:38,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 12:04:38,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 12:04:38,769 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:38,836 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-05-02 12:04:38,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 12:04:38,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-02 12:04:38,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:38,838 INFO L225 Difference]: With dead ends: 38 [2021-05-02 12:04:38,838 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 12:04:38,839 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 12:04:38,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 12:04:38,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2021-05-02 12:04:38,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-05-02 12:04:38,843 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2021-05-02 12:04:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:38,843 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-05-02 12:04:38,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-05-02 12:04:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 12:04:38,844 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:38,844 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:39,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 12:04:39,061 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:39,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:39,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1397426067, now seen corresponding path program 2 times [2021-05-02 12:04:39,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:39,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543940725] [2021-05-02 12:04:39,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:39,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 12:04:39,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:39,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543940725] [2021-05-02 12:04:39,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543940725] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:04:39,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:04:39,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 12:04:39,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432089896] [2021-05-02 12:04:39,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 12:04:39,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:39,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 12:04:39,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 12:04:39,127 INFO L87 Difference]: Start difference. First operand 20 states and 21 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:39,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:39,210 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-05-02 12:04:39,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 12:04:39,211 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 12:04:39,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:39,211 INFO L225 Difference]: With dead ends: 28 [2021-05-02 12:04:39,211 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 12:04:39,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-02 12:04:39,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 12:04:39,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-05-02 12:04:39,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:39,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-02 12:04:39,216 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-05-02 12:04:39,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:39,216 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-02 12:04:39,216 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:39,216 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-02 12:04:39,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 12:04:39,217 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:39,217 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:39,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 12:04:39,217 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:39,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:39,218 INFO L82 PathProgramCache]: Analyzing trace with hash -706411172, now seen corresponding path program 1 times [2021-05-02 12:04:39,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:39,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685869509] [2021-05-02 12:04:39,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:39,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 12:04:39,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:39,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685869509] [2021-05-02 12:04:39,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685869509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:39,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104689690] [2021-05-02 12:04:39,274 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 12:04:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:39,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 12:04:39,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:39,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 12:04:39,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104689690] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:39,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:39,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-05-02 12:04:39,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492058089] [2021-05-02 12:04:39,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 12:04:39,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:39,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 12:04:39,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-02 12:04:39,363 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:39,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:39,449 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-02 12:04:39,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 12:04:39,449 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 12:04:39,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:39,450 INFO L225 Difference]: With dead ends: 47 [2021-05-02 12:04:39,450 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 12:04:39,450 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:04:39,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 12:04:39,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-05-02 12:04:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:39,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-05-02 12:04:39,454 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 21 [2021-05-02 12:04:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:39,454 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-05-02 12:04:39,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:39,454 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-05-02 12:04:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 12:04:39,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:39,455 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:39,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:39,671 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:39,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:39,671 INFO L82 PathProgramCache]: Analyzing trace with hash -194252646, now seen corresponding path program 2 times [2021-05-02 12:04:39,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:39,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950982084] [2021-05-02 12:04:39,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:39,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 12:04:39,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:39,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950982084] [2021-05-02 12:04:39,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950982084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:39,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32655756] [2021-05-02 12:04:39,719 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 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 12:04:39,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:39,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:39,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 12:04:39,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:39,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 12:04:39,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32655756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:39,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:39,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 12:04:39,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463926060] [2021-05-02 12:04:39,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 12:04:39,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:39,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 12:04:39,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 12:04:39,821 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:39,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:39,885 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2021-05-02 12:04:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 12:04:39,886 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 12:04:39,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:39,887 INFO L225 Difference]: With dead ends: 55 [2021-05-02 12:04:39,887 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 12:04:39,887 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 12:04:39,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 12:04:39,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-05-02 12:04:39,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-05-02 12:04:39,890 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2021-05-02 12:04:39,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:39,890 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-05-02 12:04:39,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:39,891 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-05-02 12:04:39,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 12:04:39,891 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:39,891 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:40,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:40,092 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:40,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:40,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1640146872, now seen corresponding path program 3 times [2021-05-02 12:04:40,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:40,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742506399] [2021-05-02 12:04:40,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:40,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 12:04:40,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:40,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742506399] [2021-05-02 12:04:40,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742506399] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:40,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360588332] [2021-05-02 12:04:40,164 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 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 12:04:40,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 12:04:40,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:40,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 12:04:40,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:40,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 12:04:40,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360588332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:40,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:40,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-02 12:04:40,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447171636] [2021-05-02 12:04:40,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 12:04:40,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:40,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 12:04:40,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:04:40,310 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:40,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:40,419 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2021-05-02 12:04:40,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 12:04:40,420 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-02 12:04:40,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:40,420 INFO L225 Difference]: With dead ends: 63 [2021-05-02 12:04:40,420 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 12:04:40,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:04:40,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 12:04:40,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-02 12:04:40,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-05-02 12:04:40,424 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 31 [2021-05-02 12:04:40,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:40,425 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-05-02 12:04:40,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:40,425 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-05-02 12:04:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 12:04:40,425 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:40,426 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:40,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:40,644 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:40,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:40,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1169936266, now seen corresponding path program 4 times [2021-05-02 12:04:40,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:40,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152295165] [2021-05-02 12:04:40,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:40,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 12:04:40,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:40,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152295165] [2021-05-02 12:04:40,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152295165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:40,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024552665] [2021-05-02 12:04:40,738 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 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 12:04:40,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:04:40,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:40,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 12:04:40,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:40,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 12:04:40,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024552665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:40,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:40,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 12:04:40,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701728453] [2021-05-02 12:04:40,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 12:04:40,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:40,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 12:04:40,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:04:40,864 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:40,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:40,909 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2021-05-02 12:04:40,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 12:04:40,910 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-02 12:04:40,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:40,910 INFO L225 Difference]: With dead ends: 71 [2021-05-02 12:04:40,910 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 12:04:40,911 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:04:40,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 12:04:40,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-05-02 12:04:40,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:40,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-05-02 12:04:40,914 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2021-05-02 12:04:40,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:40,914 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-05-02 12:04:40,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:40,914 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-05-02 12:04:40,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 12:04:40,915 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:40,915 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:41,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:41,130 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:41,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:41,131 INFO L82 PathProgramCache]: Analyzing trace with hash -491841004, now seen corresponding path program 5 times [2021-05-02 12:04:41,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:41,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78913835] [2021-05-02 12:04:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:41,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 12:04:41,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:41,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78913835] [2021-05-02 12:04:41,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78913835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:41,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954144006] [2021-05-02 12:04:41,196 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 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 12:04:41,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 12:04:41,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:41,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 12:04:41,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:41,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 12:04:41,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954144006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:41,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:41,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-02 12:04:41,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447340586] [2021-05-02 12:04:41,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 12:04:41,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:41,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 12:04:41,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:04:41,308 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:41,378 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2021-05-02 12:04:41,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 12:04:41,379 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-02 12:04:41,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:41,379 INFO L225 Difference]: With dead ends: 77 [2021-05-02 12:04:41,379 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 12:04:41,379 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:04:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 12:04:41,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2021-05-02 12:04:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:41,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-05-02 12:04:41,383 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2021-05-02 12:04:41,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:41,383 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-05-02 12:04:41,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:41,383 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-05-02 12:04:41,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 12:04:41,384 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:41,384 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:41,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:41,604 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:41,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:41,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1677323214, now seen corresponding path program 6 times [2021-05-02 12:04:41,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:41,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728070724] [2021-05-02 12:04:41,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:41,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 12:04:41,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:41,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728070724] [2021-05-02 12:04:41,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728070724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:41,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339383381] [2021-05-02 12:04:41,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:04:41,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-02 12:04:41,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:41,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 12:04:41,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:41,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 12:04:41,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339383381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:41,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:41,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-05-02 12:04:41,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684653356] [2021-05-02 12:04:41,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 12:04:41,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:41,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 12:04:41,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:04:41,793 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:41,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:41,854 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2021-05-02 12:04:41,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 12:04:41,854 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-02 12:04:41,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:41,855 INFO L225 Difference]: With dead ends: 83 [2021-05-02 12:04:41,855 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 12:04:41,855 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:04:41,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 12:04:41,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2021-05-02 12:04:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:41,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-05-02 12:04:41,858 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2021-05-02 12:04:41,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:41,858 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-05-02 12:04:41,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:41,859 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-05-02 12:04:41,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 12:04:41,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:41,859 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:42,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 12:04:42,077 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:42,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:42,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1535573712, now seen corresponding path program 7 times [2021-05-02 12:04:42,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:42,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295163964] [2021-05-02 12:04:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:42,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:42,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 12:04:42,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:42,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295163964] [2021-05-02 12:04:42,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295163964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:42,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201007829] [2021-05-02 12:04:42,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:04:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:42,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 12:04:42,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:42,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 12:04:42,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201007829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:42,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:42,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-02 12:04:42,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174382679] [2021-05-02 12:04:42,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 12:04:42,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:42,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 12:04:42,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:04:42,264 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:42,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:42,329 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2021-05-02 12:04:42,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 12:04:42,330 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-02 12:04:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:42,330 INFO L225 Difference]: With dead ends: 89 [2021-05-02 12:04:42,330 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 12:04:42,331 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:04:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 12:04:42,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-05-02 12:04:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-05-02 12:04:42,334 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2021-05-02 12:04:42,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:42,334 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-05-02 12:04:42,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:42,334 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-05-02 12:04:42,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 12:04:42,334 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:42,335 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:42,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 12:04:42,549 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:42,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:42,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1048033774, now seen corresponding path program 8 times [2021-05-02 12:04:42,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:42,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536495324] [2021-05-02 12:04:42,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:42,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 12:04:42,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:42,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536495324] [2021-05-02 12:04:42,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536495324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:42,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460787997] [2021-05-02 12:04:42,658 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 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 12:04:42,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:42,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:42,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 12:04:42,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:42,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 12:04:42,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460787997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:42,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:42,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-02 12:04:42,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966123331] [2021-05-02 12:04:42,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 12:04:42,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:42,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 12:04:42,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:04:42,780 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:42,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:42,856 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2021-05-02 12:04:42,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 12:04:42,856 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-02 12:04:42,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:42,857 INFO L225 Difference]: With dead ends: 95 [2021-05-02 12:04:42,857 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 12:04:42,857 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:04:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 12:04:42,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2021-05-02 12:04:42,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:42,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-05-02 12:04:42,860 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2021-05-02 12:04:42,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:42,862 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-05-02 12:04:42,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:42,863 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-05-02 12:04:42,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 12:04:42,863 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:42,863 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:43,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:43,067 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:43,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:43,068 INFO L82 PathProgramCache]: Analyzing trace with hash 673588620, now seen corresponding path program 9 times [2021-05-02 12:04:43,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:43,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56433500] [2021-05-02 12:04:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:43,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 12:04:43,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:43,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56433500] [2021-05-02 12:04:43,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56433500] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:43,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767865037] [2021-05-02 12:04:43,165 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 12:04:43,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-02 12:04:43,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:43,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 12:04:43,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:43,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-02 12:04:43,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767865037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:43,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:43,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 17 [2021-05-02 12:04:43,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025887226] [2021-05-02 12:04:43,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 12:04:43,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:43,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 12:04:43,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-05-02 12:04:43,308 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:43,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:43,426 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2021-05-02 12:04:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 12:04:43,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-02 12:04:43,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:43,427 INFO L225 Difference]: With dead ends: 103 [2021-05-02 12:04:43,427 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 12:04:43,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-05-02 12:04:43,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 12:04:43,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-05-02 12:04:43,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:43,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-05-02 12:04:43,431 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 49 [2021-05-02 12:04:43,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:43,431 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-05-02 12:04:43,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:43,431 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-05-02 12:04:43,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 12:04:43,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:43,432 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:43,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:43,637 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:43,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:43,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1480986634, now seen corresponding path program 10 times [2021-05-02 12:04:43,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:43,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467812886] [2021-05-02 12:04:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:43,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 12:04:43,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:43,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467812886] [2021-05-02 12:04:43,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467812886] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:43,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290988452] [2021-05-02 12:04:43,834 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 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 12:04:43,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:04:43,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:43,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 12:04:43,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:43,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 12:04:44,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290988452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:44,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:44,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-02 12:04:44,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809787535] [2021-05-02 12:04:44,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 12:04:44,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:44,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 12:04:44,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 12:04:44,086 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:44,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:44,166 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2021-05-02 12:04:44,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 12:04:44,166 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-05-02 12:04:44,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:44,167 INFO L225 Difference]: With dead ends: 119 [2021-05-02 12:04:44,167 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 12:04:44,168 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 12:04:44,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 12:04:44,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-05-02 12:04:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-05-02 12:04:44,179 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2021-05-02 12:04:44,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:44,179 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-05-02 12:04:44,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:44,180 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-05-02 12:04:44,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 12:04:44,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:44,180 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:44,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 12:04:44,414 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:44,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:44,414 INFO L82 PathProgramCache]: Analyzing trace with hash 824103208, now seen corresponding path program 11 times [2021-05-02 12:04:44,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:44,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918866526] [2021-05-02 12:04:44,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:44,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 12:04:44,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:44,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918866526] [2021-05-02 12:04:44,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918866526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:44,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950126882] [2021-05-02 12:04:44,529 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 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 12:04:44,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-02 12:04:44,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:44,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 12:04:44,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:44,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 12:04:44,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950126882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:44,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:44,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-05-02 12:04:44,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474434851] [2021-05-02 12:04:44,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 12:04:44,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:44,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 12:04:44,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 12:04:44,746 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:44,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:44,842 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2021-05-02 12:04:44,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 12:04:44,843 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-05-02 12:04:44,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:44,843 INFO L225 Difference]: With dead ends: 125 [2021-05-02 12:04:44,843 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 12:04:44,844 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 12:04:44,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 12:04:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2021-05-02 12:04:44,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-05-02 12:04:44,847 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 71 [2021-05-02 12:04:44,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:44,847 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-05-02 12:04:44,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:44,847 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-05-02 12:04:44,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 12:04:44,848 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:44,848 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:45,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 12:04:45,064 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:45,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:45,064 INFO L82 PathProgramCache]: Analyzing trace with hash 919323334, now seen corresponding path program 12 times [2021-05-02 12:04:45,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:45,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214280236] [2021-05-02 12:04:45,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:45,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 12:04:45,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:45,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214280236] [2021-05-02 12:04:45,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214280236] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:45,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586014055] [2021-05-02 12:04:45,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:04:45,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-05-02 12:04:45,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:45,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 12:04:45,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:45,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 12:04:45,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586014055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:45,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:45,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-05-02 12:04:45,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094396104] [2021-05-02 12:04:45,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 12:04:45,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:45,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 12:04:45,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 12:04:45,557 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:45,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:45,651 INFO L93 Difference]: Finished difference Result 131 states and 136 transitions. [2021-05-02 12:04:45,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 12:04:45,652 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-05-02 12:04:45,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:45,652 INFO L225 Difference]: With dead ends: 131 [2021-05-02 12:04:45,652 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 12:04:45,653 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 12:04:45,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 12:04:45,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2021-05-02 12:04:45,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-05-02 12:04:45,655 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 73 [2021-05-02 12:04:45,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:45,655 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-05-02 12:04:45,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:45,656 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-05-02 12:04:45,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 12:04:45,656 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:45,656 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:45,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 12:04:45,872 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:45,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:45,873 INFO L82 PathProgramCache]: Analyzing trace with hash -2063416092, now seen corresponding path program 13 times [2021-05-02 12:04:45,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:45,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004702790] [2021-05-02 12:04:45,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:46,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 12:04:46,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:46,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004702790] [2021-05-02 12:04:46,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004702790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:46,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107872599] [2021-05-02 12:04:46,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:04:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:46,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 12:04:46,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:46,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 12:04:46,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107872599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:46,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:46,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-05-02 12:04:46,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060437259] [2021-05-02 12:04:46,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 12:04:46,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:46,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 12:04:46,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 12:04:46,185 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:46,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:46,271 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2021-05-02 12:04:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 12:04:46,272 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-05-02 12:04:46,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:46,272 INFO L225 Difference]: With dead ends: 137 [2021-05-02 12:04:46,273 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 12:04:46,273 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 12:04:46,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 12:04:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2021-05-02 12:04:46,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:46,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-05-02 12:04:46,275 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2021-05-02 12:04:46,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:46,276 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-05-02 12:04:46,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:46,276 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-05-02 12:04:46,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 12:04:46,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:46,276 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:46,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:46,495 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:46,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:46,495 INFO L82 PathProgramCache]: Analyzing trace with hash 562149250, now seen corresponding path program 14 times [2021-05-02 12:04:46,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:46,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044412540] [2021-05-02 12:04:46,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:46,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 12:04:46,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:46,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044412540] [2021-05-02 12:04:46,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044412540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:46,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158462406] [2021-05-02 12:04:46,648 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:46,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:46,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:46,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 12:04:46,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:46,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 12:04:46,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158462406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:46,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:46,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-05-02 12:04:46,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584881105] [2021-05-02 12:04:46,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 12:04:46,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:46,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 12:04:46,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 12:04:46,805 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:46,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:46,907 INFO L93 Difference]: Finished difference Result 143 states and 150 transitions. [2021-05-02 12:04:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 12:04:46,907 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-05-02 12:04:46,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:46,908 INFO L225 Difference]: With dead ends: 143 [2021-05-02 12:04:46,908 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 12:04:46,908 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 12:04:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 12:04:46,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-05-02 12:04:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-05-02 12:04:46,911 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 77 [2021-05-02 12:04:46,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:46,911 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-05-02 12:04:46,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:46,911 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-05-02 12:04:46,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 12:04:46,912 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:46,912 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:47,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 12:04:47,128 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:47,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:47,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1710327136, now seen corresponding path program 15 times [2021-05-02 12:04:47,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:47,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871463518] [2021-05-02 12:04:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:47,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 12:04:47,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:47,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871463518] [2021-05-02 12:04:47,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871463518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:47,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785412916] [2021-05-02 12:04:47,325 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:47,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-02 12:04:47,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:47,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 12:04:47,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:47,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-05-02 12:04:47,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785412916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:47,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:47,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 23 [2021-05-02 12:04:47,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873239597] [2021-05-02 12:04:47,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 12:04:47,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:47,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 12:04:47,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2021-05-02 12:04:47,570 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 21 states have internal predecessors, (87), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:47,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:47,709 INFO L93 Difference]: Finished difference Result 151 states and 159 transitions. [2021-05-02 12:04:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 12:04:47,710 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 21 states have internal predecessors, (87), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-05-02 12:04:47,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:47,710 INFO L225 Difference]: With dead ends: 151 [2021-05-02 12:04:47,710 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 12:04:47,712 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-05-02 12:04:47,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 12:04:47,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2021-05-02 12:04:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:47,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-05-02 12:04:47,714 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 79 [2021-05-02 12:04:47,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:47,714 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-05-02 12:04:47,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 21 states have internal predecessors, (87), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:47,715 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-05-02 12:04:47,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 12:04:47,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:47,715 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:47,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:47,932 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:47,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:47,932 INFO L82 PathProgramCache]: Analyzing trace with hash 2142920606, now seen corresponding path program 16 times [2021-05-02 12:04:47,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:47,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030078126] [2021-05-02 12:04:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:48,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 12:04:48,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:48,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030078126] [2021-05-02 12:04:48,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030078126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:48,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121835256] [2021-05-02 12:04:48,120 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:48,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:04:48,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:48,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 12:04:48,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:48,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 12:04:48,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121835256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:48,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:48,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-05-02 12:04:48,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834852089] [2021-05-02 12:04:48,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 12:04:48,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:48,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 12:04:48,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 12:04:48,314 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:48,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:48,424 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2021-05-02 12:04:48,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 12:04:48,424 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-05-02 12:04:48,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:48,425 INFO L225 Difference]: With dead ends: 167 [2021-05-02 12:04:48,425 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 12:04:48,425 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 12:04:48,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 12:04:48,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2021-05-02 12:04:48,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:48,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2021-05-02 12:04:48,434 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2021-05-02 12:04:48,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:48,434 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2021-05-02 12:04:48,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:48,435 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2021-05-02 12:04:48,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 12:04:48,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:48,435 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:48,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:48,653 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:48,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:48,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1087559740, now seen corresponding path program 17 times [2021-05-02 12:04:48,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:48,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93821119] [2021-05-02 12:04:48,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:48,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 12:04:48,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:48,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93821119] [2021-05-02 12:04:48,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93821119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:48,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747170461] [2021-05-02 12:04:48,905 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:49,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-05-02 12:04:49,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:49,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 12:04:49,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:49,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 12:04:49,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747170461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:49,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:49,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2021-05-02 12:04:49,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801727926] [2021-05-02 12:04:49,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 12:04:49,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:49,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 12:04:49,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 12:04:49,197 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:49,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:49,333 INFO L93 Difference]: Finished difference Result 173 states and 177 transitions. [2021-05-02 12:04:49,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 12:04:49,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-05-02 12:04:49,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:49,334 INFO L225 Difference]: With dead ends: 173 [2021-05-02 12:04:49,334 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 12:04:49,334 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 12:04:49,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 12:04:49,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 104. [2021-05-02 12:04:49,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:49,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2021-05-02 12:04:49,337 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 101 [2021-05-02 12:04:49,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:49,337 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2021-05-02 12:04:49,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:49,337 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2021-05-02 12:04:49,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 12:04:49,338 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:49,338 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:49,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 12:04:49,554 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:49,555 INFO L82 PathProgramCache]: Analyzing trace with hash 498049370, now seen corresponding path program 18 times [2021-05-02 12:04:49,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:49,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016540038] [2021-05-02 12:04:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:49,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 12:04:49,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:49,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016540038] [2021-05-02 12:04:49,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016540038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:49,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124828955] [2021-05-02 12:04:49,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:50,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-05-02 12:04:50,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:50,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 12:04:50,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:50,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 12:04:50,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124828955] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:50,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:50,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2021-05-02 12:04:50,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143095187] [2021-05-02 12:04:50,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 12:04:50,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:50,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 12:04:50,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 12:04:50,590 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:50,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:50,716 INFO L93 Difference]: Finished difference Result 179 states and 184 transitions. [2021-05-02 12:04:50,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 12:04:50,716 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2021-05-02 12:04:50,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:50,717 INFO L225 Difference]: With dead ends: 179 [2021-05-02 12:04:50,717 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 12:04:50,719 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 12:04:50,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 12:04:50,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2021-05-02 12:04:50,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:50,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2021-05-02 12:04:50,721 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 103 [2021-05-02 12:04:50,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:50,721 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2021-05-02 12:04:50,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2021-05-02 12:04:50,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 12:04:50,722 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:50,722 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:50,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:50,939 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:50,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:50,939 INFO L82 PathProgramCache]: Analyzing trace with hash 914266872, now seen corresponding path program 19 times [2021-05-02 12:04:50,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:50,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566266500] [2021-05-02 12:04:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:51,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 12:04:51,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:51,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566266500] [2021-05-02 12:04:51,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566266500] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:51,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88463488] [2021-05-02 12:04:51,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:51,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 12:04:51,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:51,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 12:04:51,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88463488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:51,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:51,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-05-02 12:04:51,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254903478] [2021-05-02 12:04:51,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 12:04:51,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:51,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 12:04:51,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 12:04:51,381 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:51,524 INFO L93 Difference]: Finished difference Result 185 states and 191 transitions. [2021-05-02 12:04:51,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 12:04:51,525 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2021-05-02 12:04:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:51,525 INFO L225 Difference]: With dead ends: 185 [2021-05-02 12:04:51,525 INFO L226 Difference]: Without dead ends: 126 [2021-05-02 12:04:51,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 208.8ms TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 12:04:51,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-02 12:04:51,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2021-05-02 12:04:51,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:51,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2021-05-02 12:04:51,528 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 105 [2021-05-02 12:04:51,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:51,528 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2021-05-02 12:04:51,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:51,529 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2021-05-02 12:04:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 12:04:51,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:51,529 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:51,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 12:04:51,737 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:51,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1467327766, now seen corresponding path program 20 times [2021-05-02 12:04:51,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:51,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18419496] [2021-05-02 12:04:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:51,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 12:04:51,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:51,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18419496] [2021-05-02 12:04:51,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18419496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:51,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051294726] [2021-05-02 12:04:51,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:52,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:52,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:52,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 12:04:52,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:52,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 12:04:52,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051294726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:52,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:52,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2021-05-02 12:04:52,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096971787] [2021-05-02 12:04:52,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 12:04:52,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:52,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 12:04:52,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 12:04:52,182 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:52,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:52,328 INFO L93 Difference]: Finished difference Result 191 states and 198 transitions. [2021-05-02 12:04:52,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 12:04:52,328 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2021-05-02 12:04:52,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:52,329 INFO L225 Difference]: With dead ends: 191 [2021-05-02 12:04:52,329 INFO L226 Difference]: Without dead ends: 132 [2021-05-02 12:04:52,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 186.7ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 12:04:52,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-02 12:04:52,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 110. [2021-05-02 12:04:52,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:52,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2021-05-02 12:04:52,332 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 107 [2021-05-02 12:04:52,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:52,332 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2021-05-02 12:04:52,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:52,332 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2021-05-02 12:04:52,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-02 12:04:52,333 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:52,333 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:52,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 12:04:52,548 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:52,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:52,550 INFO L82 PathProgramCache]: Analyzing trace with hash 382902196, now seen corresponding path program 21 times [2021-05-02 12:04:52,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:52,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667352754] [2021-05-02 12:04:52,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:52,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 12:04:52,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:52,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667352754] [2021-05-02 12:04:52,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667352754] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:52,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267673925] [2021-05-02 12:04:52,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:53,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-05-02 12:04:53,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:53,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 12:04:53,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:53,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-05-02 12:04:53,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267673925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:53,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:53,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 29 [2021-05-02 12:04:53,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334361773] [2021-05-02 12:04:53,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 12:04:53,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:53,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 12:04:53,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2021-05-02 12:04:53,405 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 29 states, 29 states have (on average 4.0344827586206895) internal successors, (117), 27 states have internal predecessors, (117), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:53,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:53,605 INFO L93 Difference]: Finished difference Result 199 states and 207 transitions. [2021-05-02 12:04:53,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 12:04:53,606 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.0344827586206895) internal successors, (117), 27 states have internal predecessors, (117), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2021-05-02 12:04:53,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:53,606 INFO L225 Difference]: With dead ends: 199 [2021-05-02 12:04:53,606 INFO L226 Difference]: Without dead ends: 132 [2021-05-02 12:04:53,607 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 355.2ms TimeCoverageRelationStatistics Valid=341, Invalid=589, Unknown=0, NotChecked=0, Total=930 [2021-05-02 12:04:53,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-02 12:04:53,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2021-05-02 12:04:53,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:53,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2021-05-02 12:04:53,609 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 109 [2021-05-02 12:04:53,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:53,610 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2021-05-02 12:04:53,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.0344827586206895) internal successors, (117), 27 states have internal predecessors, (117), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:53,610 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2021-05-02 12:04:53,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 12:04:53,610 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:53,610 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:53,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:53,827 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:53,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:53,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1828216626, now seen corresponding path program 22 times [2021-05-02 12:04:53,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:53,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153924777] [2021-05-02 12:04:53,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:54,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 12:04:54,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:54,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153924777] [2021-05-02 12:04:54,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153924777] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:54,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912437864] [2021-05-02 12:04:54,120 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:54,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:04:54,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:54,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 12:04:54,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:54,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 12:04:54,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912437864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:54,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:54,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2021-05-02 12:04:54,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024335087] [2021-05-02 12:04:54,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 12:04:54,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:54,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 12:04:54,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 12:04:54,356 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:54,499 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2021-05-02 12:04:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 12:04:54,500 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2021-05-02 12:04:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:54,500 INFO L225 Difference]: With dead ends: 215 [2021-05-02 12:04:54,500 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 12:04:54,501 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 12:04:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 12:04:54,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2021-05-02 12:04:54,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:54,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2021-05-02 12:04:54,503 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2021-05-02 12:04:54,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:54,504 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2021-05-02 12:04:54,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:54,504 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2021-05-02 12:04:54,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-02 12:04:54,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:54,504 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:54,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 12:04:54,720 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:54,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:54,721 INFO L82 PathProgramCache]: Analyzing trace with hash 966422352, now seen corresponding path program 23 times [2021-05-02 12:04:54,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:54,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141417531] [2021-05-02 12:04:54,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:55,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 12:04:55,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:55,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141417531] [2021-05-02 12:04:55,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141417531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:55,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629273452] [2021-05-02 12:04:55,052 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:55,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-05-02 12:04:55,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:55,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 12:04:55,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:55,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 12:04:55,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629273452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:55,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:55,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2021-05-02 12:04:55,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736334145] [2021-05-02 12:04:55,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 12:04:55,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:55,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 12:04:55,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 12:04:55,533 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:55,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:55,681 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2021-05-02 12:04:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 12:04:55,681 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2021-05-02 12:04:55,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:55,682 INFO L225 Difference]: With dead ends: 221 [2021-05-02 12:04:55,682 INFO L226 Difference]: Without dead ends: 144 [2021-05-02 12:04:55,682 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 293.4ms TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 12:04:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-02 12:04:55,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 134. [2021-05-02 12:04:55,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2021-05-02 12:04:55,685 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 131 [2021-05-02 12:04:55,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:55,685 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2021-05-02 12:04:55,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:55,685 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2021-05-02 12:04:55,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-02 12:04:55,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:55,686 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:55,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:55,902 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:55,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:55,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1710813166, now seen corresponding path program 24 times [2021-05-02 12:04:55,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:55,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29595595] [2021-05-02 12:04:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:56,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 12:04:56,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:56,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29595595] [2021-05-02 12:04:56,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29595595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:56,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306767573] [2021-05-02 12:04:56,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:57,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-05-02 12:04:57,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:57,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 12:04:57,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:57,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 12:04:57,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306767573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:57,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:57,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2021-05-02 12:04:57,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839153388] [2021-05-02 12:04:57,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 12:04:57,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:57,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 12:04:57,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 12:04:57,331 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:57,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:57,457 INFO L93 Difference]: Finished difference Result 227 states and 232 transitions. [2021-05-02 12:04:57,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 12:04:57,458 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2021-05-02 12:04:57,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:57,458 INFO L225 Difference]: With dead ends: 227 [2021-05-02 12:04:57,458 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 12:04:57,459 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 300.9ms TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 12:04:57,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 12:04:57,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 136. [2021-05-02 12:04:57,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:57,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2021-05-02 12:04:57,462 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 133 [2021-05-02 12:04:57,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:57,462 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2021-05-02 12:04:57,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:57,462 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2021-05-02 12:04:57,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 12:04:57,462 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:57,462 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:57,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 12:04:57,680 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:57,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:57,681 INFO L82 PathProgramCache]: Analyzing trace with hash -189153012, now seen corresponding path program 25 times [2021-05-02 12:04:57,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:57,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347440058] [2021-05-02 12:04:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:58,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1481 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 12:04:58,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:58,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347440058] [2021-05-02 12:04:58,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347440058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:58,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731209934] [2021-05-02 12:04:58,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:58,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 12:04:58,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:58,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1481 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 12:04:58,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731209934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:58,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:58,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2021-05-02 12:04:58,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890711494] [2021-05-02 12:04:58,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 12:04:58,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:58,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 12:04:58,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 12:04:58,301 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:58,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:58,468 INFO L93 Difference]: Finished difference Result 233 states and 239 transitions. [2021-05-02 12:04:58,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 12:04:58,469 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2021-05-02 12:04:58,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:58,469 INFO L225 Difference]: With dead ends: 233 [2021-05-02 12:04:58,469 INFO L226 Difference]: Without dead ends: 156 [2021-05-02 12:04:58,470 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 294.1ms TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 12:04:58,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-02 12:04:58,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 138. [2021-05-02 12:04:58,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:58,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2021-05-02 12:04:58,472 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 135 [2021-05-02 12:04:58,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:58,472 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2021-05-02 12:04:58,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:58,473 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2021-05-02 12:04:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-05-02 12:04:58,473 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:58,473 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:58,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 12:04:58,689 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:58,689 INFO L82 PathProgramCache]: Analyzing trace with hash -695549270, now seen corresponding path program 26 times [2021-05-02 12:04:58,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:58,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839372556] [2021-05-02 12:04:58,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:59,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1534 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 12:04:59,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:59,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839372556] [2021-05-02 12:04:59,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839372556] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:59,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363189535] [2021-05-02 12:04:59,032 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:59,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:59,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:59,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 12:04:59,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:59,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1534 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 12:04:59,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363189535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:59,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:59,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2021-05-02 12:04:59,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055695615] [2021-05-02 12:04:59,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 12:04:59,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:59,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 12:04:59,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 12:04:59,269 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:59,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:59,463 INFO L93 Difference]: Finished difference Result 239 states and 246 transitions. [2021-05-02 12:04:59,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 12:04:59,464 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2021-05-02 12:04:59,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:59,464 INFO L225 Difference]: With dead ends: 239 [2021-05-02 12:04:59,464 INFO L226 Difference]: Without dead ends: 162 [2021-05-02 12:04:59,465 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 310.9ms TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 12:04:59,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-02 12:04:59,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 140. [2021-05-02 12:04:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:59,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2021-05-02 12:04:59,469 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 137 [2021-05-02 12:04:59,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:59,469 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2021-05-02 12:04:59,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:59,469 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2021-05-02 12:04:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-05-02 12:04:59,469 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:59,469 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:59,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:59,685 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:59,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:59,685 INFO L82 PathProgramCache]: Analyzing trace with hash -2011048760, now seen corresponding path program 27 times [2021-05-02 12:04:59,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:59,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275076535] [2021-05-02 12:04:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:00,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1589 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 12:05:00,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:00,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275076535] [2021-05-02 12:05:00,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275076535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:00,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503535675] [2021-05-02 12:05:00,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:02,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-05-02 12:05:02,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:02,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 12:05:02,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:02,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1589 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-05-02 12:05:02,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503535675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:02,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:02,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28] total 35 [2021-05-02 12:05:02,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059718108] [2021-05-02 12:05:02,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 12:05:02,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:02,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 12:05:02,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 12:05:02,227 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 35 states, 35 states have (on average 4.2) internal successors, (147), 33 states have internal predecessors, (147), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:02,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:02,476 INFO L93 Difference]: Finished difference Result 247 states and 255 transitions. [2021-05-02 12:05:02,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 12:05:02,476 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.2) internal successors, (147), 33 states have internal predecessors, (147), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2021-05-02 12:05:02,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:02,477 INFO L225 Difference]: With dead ends: 247 [2021-05-02 12:05:02,477 INFO L226 Difference]: Without dead ends: 162 [2021-05-02 12:05:02,477 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 428.0ms TimeCoverageRelationStatistics Valid=512, Invalid=820, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 12:05:02,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-02 12:05:02,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2021-05-02 12:05:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:02,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2021-05-02 12:05:02,480 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 139 [2021-05-02 12:05:02,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:02,480 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2021-05-02 12:05:02,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 4.2) internal successors, (147), 33 states have internal predecessors, (147), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:02,480 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2021-05-02 12:05:02,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-05-02 12:05:02,481 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:02,481 INFO L523 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:02,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:02,700 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:02,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:02,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1143517498, now seen corresponding path program 28 times [2021-05-02 12:05:02,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:02,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145889385] [2021-05-02 12:05:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:03,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 12:05:03,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:03,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145889385] [2021-05-02 12:05:03,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145889385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:03,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511903452] [2021-05-02 12:05:03,102 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:03,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:05:03,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:03,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 12:05:03,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:03,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 12:05:03,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511903452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:03,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:03,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2021-05-02 12:05:03,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074332276] [2021-05-02 12:05:03,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 12:05:03,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:03,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 12:05:03,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 12:05:03,372 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:03,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:03,545 INFO L93 Difference]: Finished difference Result 263 states and 266 transitions. [2021-05-02 12:05:03,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 12:05:03,545 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2021-05-02 12:05:03,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:03,546 INFO L225 Difference]: With dead ends: 263 [2021-05-02 12:05:03,546 INFO L226 Difference]: Without dead ends: 168 [2021-05-02 12:05:03,547 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 353.0ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 12:05:03,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-02 12:05:03,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 162. [2021-05-02 12:05:03,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0127388535031847) internal successors, (159), 157 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2021-05-02 12:05:03,550 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 159 [2021-05-02 12:05:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:03,550 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2021-05-02 12:05:03,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2021-05-02 12:05:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-05-02 12:05:03,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:03,551 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:03,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 12:05:03,767 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:03,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:03,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1086641764, now seen corresponding path program 29 times [2021-05-02 12:05:03,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:03,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086376197] [2021-05-02 12:05:03,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:04,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2176 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 12:05:04,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:04,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086376197] [2021-05-02 12:05:04,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086376197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:04,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042485731] [2021-05-02 12:05:04,199 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:04,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-05-02 12:05:04,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:04,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 12:05:04,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:04,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2176 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 12:05:04,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042485731] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:04,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:04,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2021-05-02 12:05:04,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15532461] [2021-05-02 12:05:04,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 12:05:04,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:04,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 12:05:04,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 12:05:04,981 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:05,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:05,150 INFO L93 Difference]: Finished difference Result 269 states and 273 transitions. [2021-05-02 12:05:05,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 12:05:05,150 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2021-05-02 12:05:05,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:05,151 INFO L225 Difference]: With dead ends: 269 [2021-05-02 12:05:05,151 INFO L226 Difference]: Without dead ends: 174 [2021-05-02 12:05:05,152 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 395.7ms TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 12:05:05,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-02 12:05:05,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 164. [2021-05-02 12:05:05,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:05,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2021-05-02 12:05:05,154 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 161 [2021-05-02 12:05:05,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:05,154 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2021-05-02 12:05:05,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:05,155 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2021-05-02 12:05:05,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-05-02 12:05:05,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:05,155 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:05,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:05,373 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:05,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:05,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1081011842, now seen corresponding path program 30 times [2021-05-02 12:05:05,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:05,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673440878] [2021-05-02 12:05:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:05,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2237 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 12:05:05,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:05,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673440878] [2021-05-02 12:05:05,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673440878] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:05,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549208899] [2021-05-02 12:05:05,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:23,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2021-05-02 12:05:23,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:23,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 12:05:23,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:23,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2237 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 12:05:23,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549208899] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:23,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:23,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2021-05-02 12:05:23,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644095906] [2021-05-02 12:05:23,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 12:05:23,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:23,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 12:05:23,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 12:05:23,802 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:23,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:23,994 INFO L93 Difference]: Finished difference Result 275 states and 280 transitions. [2021-05-02 12:05:23,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 12:05:23,994 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2021-05-02 12:05:23,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:23,995 INFO L225 Difference]: With dead ends: 275 [2021-05-02 12:05:23,995 INFO L226 Difference]: Without dead ends: 180 [2021-05-02 12:05:23,995 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 400.9ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 12:05:23,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-02 12:05:23,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 166. [2021-05-02 12:05:23,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:23,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2021-05-02 12:05:23,998 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 163 [2021-05-02 12:05:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:23,998 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2021-05-02 12:05:23,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:23,999 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2021-05-02 12:05:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-02 12:05:23,999 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:23,999 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:24,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 12:05:24,221 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:24,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:24,221 INFO L82 PathProgramCache]: Analyzing trace with hash -34375904, now seen corresponding path program 31 times [2021-05-02 12:05:24,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:24,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240375639] [2021-05-02 12:05:24,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:24,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 12:05:24,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:24,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240375639] [2021-05-02 12:05:24,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240375639] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:24,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102717797] [2021-05-02 12:05:24,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:24,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 12:05:24,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:24,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 12:05:24,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102717797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:24,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:24,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2021-05-02 12:05:24,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426048651] [2021-05-02 12:05:24,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 12:05:24,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:24,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 12:05:24,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 12:05:24,945 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:25,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:25,149 INFO L93 Difference]: Finished difference Result 281 states and 287 transitions. [2021-05-02 12:05:25,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 12:05:25,150 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2021-05-02 12:05:25,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:25,151 INFO L225 Difference]: With dead ends: 281 [2021-05-02 12:05:25,151 INFO L226 Difference]: Without dead ends: 186 [2021-05-02 12:05:25,151 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 425.5ms TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 12:05:25,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-02 12:05:25,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 168. [2021-05-02 12:05:25,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:25,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2021-05-02 12:05:25,154 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 165 [2021-05-02 12:05:25,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:25,154 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2021-05-02 12:05:25,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2021-05-02 12:05:25,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-05-02 12:05:25,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:25,155 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:25,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 12:05:25,371 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:25,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:25,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1819824190, now seen corresponding path program 32 times [2021-05-02 12:05:25,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:25,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24839790] [2021-05-02 12:05:25,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:25,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 12:05:25,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:25,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24839790] [2021-05-02 12:05:25,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24839790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:25,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903004473] [2021-05-02 12:05:25,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:25,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:05:25,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:25,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 12:05:25,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:25,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:25,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 12:05:26,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903004473] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:26,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:26,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2021-05-02 12:05:26,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333930975] [2021-05-02 12:05:26,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 12:05:26,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:26,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 12:05:26,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 12:05:26,157 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:26,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:26,371 INFO L93 Difference]: Finished difference Result 287 states and 294 transitions. [2021-05-02 12:05:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 12:05:26,371 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2021-05-02 12:05:26,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:26,372 INFO L225 Difference]: With dead ends: 287 [2021-05-02 12:05:26,372 INFO L226 Difference]: Without dead ends: 192 [2021-05-02 12:05:26,373 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 466.8ms TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 12:05:26,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-02 12:05:26,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 170. [2021-05-02 12:05:26,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:26,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2021-05-02 12:05:26,376 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 167 [2021-05-02 12:05:26,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:26,376 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2021-05-02 12:05:26,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:26,376 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2021-05-02 12:05:26,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-05-02 12:05:26,377 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:26,377 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:26,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 12:05:26,593 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:26,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:26,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1294686684, now seen corresponding path program 33 times [2021-05-02 12:05:26,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:26,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431157904] [2021-05-02 12:05:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:27,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:27,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 12:05:27,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:27,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431157904] [2021-05-02 12:05:27,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431157904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:27,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340079305] [2021-05-02 12:05:27,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:37,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-05-02 12:05:37,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:37,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 12:05:37,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:37,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:37,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-05-02 12:05:37,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340079305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:37,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:37,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34] total 41 [2021-05-02 12:05:37,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090596367] [2021-05-02 12:05:37,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 12:05:37,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:37,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 12:05:37,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 12:05:37,719 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand has 41 states, 41 states have (on average 4.317073170731708) internal successors, (177), 39 states have internal predecessors, (177), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:37,966 INFO L93 Difference]: Finished difference Result 295 states and 303 transitions. [2021-05-02 12:05:37,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 12:05:37,966 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.317073170731708) internal successors, (177), 39 states have internal predecessors, (177), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2021-05-02 12:05:37,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:37,967 INFO L225 Difference]: With dead ends: 295 [2021-05-02 12:05:37,967 INFO L226 Difference]: Without dead ends: 192 [2021-05-02 12:05:37,968 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 574.3ms TimeCoverageRelationStatistics Valid=719, Invalid=1087, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 12:05:37,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-02 12:05:37,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2021-05-02 12:05:37,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0108108108108107) internal successors, (187), 185 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2021-05-02 12:05:37,970 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 169 [2021-05-02 12:05:37,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:37,971 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2021-05-02 12:05:37,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 4.317073170731708) internal successors, (177), 39 states have internal predecessors, (177), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:37,971 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2021-05-02 12:05:37,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-05-02 12:05:37,971 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:37,972 INFO L523 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:38,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 12:05:38,194 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:38,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1146196390, now seen corresponding path program 34 times [2021-05-02 12:05:38,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:38,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563425871] [2021-05-02 12:05:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:38,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-05-02 12:05:38,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:38,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563425871] [2021-05-02 12:05:38,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563425871] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:38,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811637555] [2021-05-02 12:05:38,707 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:38,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:05:38,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:38,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 12:05:38,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:38,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-05-02 12:05:38,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811637555] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:38,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:38,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2021-05-02 12:05:38,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759236304] [2021-05-02 12:05:38,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 12:05:38,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:38,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 12:05:38,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 12:05:38,990 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:39,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:39,222 INFO L93 Difference]: Finished difference Result 311 states and 314 transitions. [2021-05-02 12:05:39,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 12:05:39,222 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2021-05-02 12:05:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:39,223 INFO L225 Difference]: With dead ends: 311 [2021-05-02 12:05:39,223 INFO L226 Difference]: Without dead ends: 198 [2021-05-02 12:05:39,223 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 454.4ms TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 12:05:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-02 12:05:39,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 192. [2021-05-02 12:05:39,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:39,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2021-05-02 12:05:39,226 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2021-05-02 12:05:39,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:39,226 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2021-05-02 12:05:39,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:39,226 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2021-05-02 12:05:39,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-05-02 12:05:39,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:39,227 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:39,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 12:05:39,441 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:39,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:39,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1294028152, now seen corresponding path program 35 times [2021-05-02 12:05:39,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:39,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515899986] [2021-05-02 12:05:39,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:40,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-05-02 12:05:40,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:40,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515899986] [2021-05-02 12:05:40,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515899986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:40,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737605359] [2021-05-02 12:05:40,004 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:41,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-05-02 12:05:41,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:41,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 12:05:41,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:41,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-05-02 12:05:41,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737605359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:41,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:41,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2021-05-02 12:05:41,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775225519] [2021-05-02 12:05:41,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 12:05:41,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:41,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 12:05:41,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 12:05:41,628 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:41,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:41,816 INFO L93 Difference]: Finished difference Result 317 states and 321 transitions. [2021-05-02 12:05:41,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 12:05:41,816 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2021-05-02 12:05:41,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:41,817 INFO L225 Difference]: With dead ends: 317 [2021-05-02 12:05:41,817 INFO L226 Difference]: Without dead ends: 204 [2021-05-02 12:05:41,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 520.8ms TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 12:05:41,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-02 12:05:41,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 194. [2021-05-02 12:05:41,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0105820105820107) internal successors, (191), 189 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2021-05-02 12:05:41,821 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 191 [2021-05-02 12:05:41,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:41,821 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2021-05-02 12:05:41,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:41,821 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2021-05-02 12:05:41,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-05-02 12:05:41,822 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:41,822 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:42,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 12:05:42,041 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:42,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:42,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1297669398, now seen corresponding path program 36 times [2021-05-02 12:05:42,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:42,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715707350] [2021-05-02 12:05:42,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:42,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3224 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-05-02 12:05:42,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:42,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715707350] [2021-05-02 12:05:42,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715707350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:42,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127639] [2021-05-02 12:05:42,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:06:28,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2021-05-02 12:06:28,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:06:28,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 12:06:28,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:06:28,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3224 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-05-02 12:06:28,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127639] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:06:28,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:06:28,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 44 [2021-05-02 12:06:28,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734008110] [2021-05-02 12:06:28,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 12:06:28,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:06:28,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 12:06:28,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 12:06:28,650 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand has 44 states, 44 states have (on average 4.568181818181818) internal successors, (201), 42 states have internal predecessors, (201), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:28,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:06:28,933 INFO L93 Difference]: Finished difference Result 325 states and 330 transitions. [2021-05-02 12:06:28,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 12:06:28,934 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.568181818181818) internal successors, (201), 42 states have internal predecessors, (201), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2021-05-02 12:06:28,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:06:28,934 INFO L225 Difference]: With dead ends: 325 [2021-05-02 12:06:28,934 INFO L226 Difference]: Without dead ends: 207 [2021-05-02 12:06:28,935 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 602.3ms TimeCoverageRelationStatistics Valid=836, Invalid=1234, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 12:06:28,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-02 12:06:28,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2021-05-02 12:06:28,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2021-05-02 12:06:28,938 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 193 [2021-05-02 12:06:28,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:06:28,938 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2021-05-02 12:06:28,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 4.568181818181818) internal successors, (201), 42 states have internal predecessors, (201), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:28,938 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2021-05-02 12:06:28,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-05-02 12:06:28,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:06:28,939 INFO L523 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:06:29,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 12:06:29,153 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:06:29,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:06:29,153 INFO L82 PathProgramCache]: Analyzing trace with hash 887740795, now seen corresponding path program 37 times [2021-05-02 12:06:29,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:06:29,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092518001] [2021-05-02 12:06:29,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:06:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:29,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:06:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-05-02 12:06:29,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:06:29,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092518001] [2021-05-02 12:06:29,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092518001] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:06:29,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405188503] [2021-05-02 12:06:29,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:06:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:29,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 12:06:29,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:06:29,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:29,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:30,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:30,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:30,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:30,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:30,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:30,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:30,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:30,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:30,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:30,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:30,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:30,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:30,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:30,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-05-02 12:06:30,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405188503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:06:30,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:06:30,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2021-05-02 12:06:30,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21728490] [2021-05-02 12:06:30,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 12:06:30,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:06:30,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 12:06:30,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 12:06:30,111 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 42 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:30,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:06:30,320 INFO L93 Difference]: Finished difference Result 335 states and 338 transitions. [2021-05-02 12:06:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 12:06:30,321 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 42 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 204 [2021-05-02 12:06:30,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:06:30,321 INFO L225 Difference]: With dead ends: 335 [2021-05-02 12:06:30,321 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 12:06:30,322 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 578.3ms TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 12:06:30,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 12:06:30,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 207. [2021-05-02 12:06:30,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.00990099009901) internal successors, (204), 202 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:30,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2021-05-02 12:06:30,328 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 204 [2021-05-02 12:06:30,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:06:30,328 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2021-05-02 12:06:30,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 42 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:30,328 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2021-05-02 12:06:30,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-05-02 12:06:30,329 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:06:30,329 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:06:30,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:06:30,546 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:06:30,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:06:30,546 INFO L82 PathProgramCache]: Analyzing trace with hash -795534691, now seen corresponding path program 38 times [2021-05-02 12:06:30,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:06:30,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497629257] [2021-05-02 12:06:30,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:06:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:31,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:06:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3706 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-05-02 12:06:31,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:06:31,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497629257] [2021-05-02 12:06:31,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497629257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:06:31,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090654793] [2021-05-02 12:06:31,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:06:31,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:06:31,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:06:31,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 12:06:31,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:06:31,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3706 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-05-02 12:06:31,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090654793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:06:31,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:06:31,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2021-05-02 12:06:31,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406024032] [2021-05-02 12:06:31,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 12:06:31,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:06:31,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 12:06:31,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 12:06:31,572 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 43 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:31,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:06:31,800 INFO L93 Difference]: Finished difference Result 341 states and 345 transitions. [2021-05-02 12:06:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 12:06:31,800 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 43 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2021-05-02 12:06:31,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:06:31,801 INFO L225 Difference]: With dead ends: 341 [2021-05-02 12:06:31,801 INFO L226 Difference]: Without dead ends: 219 [2021-05-02 12:06:31,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 659.7ms TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 12:06:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-02 12:06:31,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 209. [2021-05-02 12:06:31,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:31,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2021-05-02 12:06:31,805 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 206 [2021-05-02 12:06:31,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:06:31,805 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2021-05-02 12:06:31,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 43 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:31,805 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2021-05-02 12:06:31,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-05-02 12:06:31,806 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:06:31,806 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:06:32,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:06:32,013 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:06:32,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:06:32,014 INFO L82 PathProgramCache]: Analyzing trace with hash 779393855, now seen corresponding path program 39 times [2021-05-02 12:06:32,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:06:32,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558144127] [2021-05-02 12:06:32,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:06:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:32,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:06:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-05-02 12:06:32,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:06:32,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558144127] [2021-05-02 12:06:32,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558144127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:06:32,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353916429] [2021-05-02 12:06:32,828 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:07:01,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2021-05-02 12:07:01,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:07:02,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 12:07:02,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:07:02,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-05-02 12:07:02,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353916429] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:07:02,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:07:02,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 47 [2021-05-02 12:07:02,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470658452] [2021-05-02 12:07:02,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 12:07:02,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:07:02,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 12:07:02,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 12:07:02,310 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand has 47 states, 47 states have (on average 4.595744680851064) internal successors, (216), 45 states have internal predecessors, (216), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:02,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:07:02,610 INFO L93 Difference]: Finished difference Result 349 states and 354 transitions. [2021-05-02 12:07:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 12:07:02,611 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.595744680851064) internal successors, (216), 45 states have internal predecessors, (216), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 208 [2021-05-02 12:07:02,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:07:02,612 INFO L225 Difference]: With dead ends: 349 [2021-05-02 12:07:02,612 INFO L226 Difference]: Without dead ends: 222 [2021-05-02 12:07:02,612 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 813.7ms TimeCoverageRelationStatistics Valid=962, Invalid=1390, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 12:07:02,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-02 12:07:02,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2021-05-02 12:07:02,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.0093023255813953) internal successors, (217), 215 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2021-05-02 12:07:02,615 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 208 [2021-05-02 12:07:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:07:02,615 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2021-05-02 12:07:02,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 4.595744680851064) internal successors, (216), 45 states have internal predecessors, (216), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2021-05-02 12:07:02,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-05-02 12:07:02,616 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:07:02,616 INFO L523 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:07:02,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:07:02,833 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:07:02,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:07:02,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1017840146, now seen corresponding path program 40 times [2021-05-02 12:07:02,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:07:02,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186503884] [2021-05-02 12:07:02,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:07:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:07:03,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:07:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:07:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 12:07:03,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:07:03,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186503884] [2021-05-02 12:07:03,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186503884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:07:03,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722647035] [2021-05-02 12:07:03,623 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:07:03,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:07:03,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:07:03,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 12:07:03,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:07:03,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 12:07:03,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722647035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:07:03,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:07:03,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-05-02 12:07:03,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720026639] [2021-05-02 12:07:03,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 12:07:03,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:07:03,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 12:07:03,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 12:07:03,963 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:07:04,221 INFO L93 Difference]: Finished difference Result 359 states and 362 transitions. [2021-05-02 12:07:04,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 12:07:04,221 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2021-05-02 12:07:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:07:04,222 INFO L225 Difference]: With dead ends: 359 [2021-05-02 12:07:04,222 INFO L226 Difference]: Without dead ends: 228 [2021-05-02 12:07:04,223 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 715.5ms TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 12:07:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-02 12:07:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 222. [2021-05-02 12:07:04,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.0092165898617511) internal successors, (219), 217 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:04,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2021-05-02 12:07:04,226 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 219 [2021-05-02 12:07:04,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:07:04,226 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2021-05-02 12:07:04,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:04,226 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2021-05-02 12:07:04,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-05-02 12:07:04,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:07:04,227 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:07:04,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 12:07:04,443 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:07:04,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:07:04,444 INFO L82 PathProgramCache]: Analyzing trace with hash -83946356, now seen corresponding path program 41 times [2021-05-02 12:07:04,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:07:04,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077320278] [2021-05-02 12:07:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:07:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:07:05,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:07:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:07:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4306 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 12:07:05,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:07:05,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077320278] [2021-05-02 12:07:05,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077320278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:07:05,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248431959] [2021-05-02 12:07:05,243 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:07:07,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-05-02 12:07:07,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:07:07,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 12:07:07,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:07:07,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4306 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 12:07:07,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248431959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:07:07,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:07:07,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2021-05-02 12:07:07,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160400579] [2021-05-02 12:07:07,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 12:07:07,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:07:07,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 12:07:07,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 12:07:07,422 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 46 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:07,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:07:07,647 INFO L93 Difference]: Finished difference Result 365 states and 369 transitions. [2021-05-02 12:07:07,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 12:07:07,647 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 46 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2021-05-02 12:07:07,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:07:07,648 INFO L225 Difference]: With dead ends: 365 [2021-05-02 12:07:07,648 INFO L226 Difference]: Without dead ends: 234 [2021-05-02 12:07:07,648 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 746.6ms TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 12:07:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-02 12:07:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 224. [2021-05-02 12:07:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.0091324200913243) internal successors, (221), 219 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2021-05-02 12:07:07,651 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 221 [2021-05-02 12:07:07,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:07:07,652 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2021-05-02 12:07:07,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 46 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2021-05-02 12:07:07,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-05-02 12:07:07,652 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:07:07,652 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:07:07,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:07:07,872 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:07:07,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:07:07,872 INFO L82 PathProgramCache]: Analyzing trace with hash -260179030, now seen corresponding path program 42 times [2021-05-02 12:07:07,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:07:07,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074425051] [2021-05-02 12:07:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:07:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:07:08,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:07:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:07:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4391 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 12:07:08,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:07:08,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074425051] [2021-05-02 12:07:08,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074425051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:07:08,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641165331] [2021-05-02 12:07:08,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:09:57,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2021-05-02 12:09:57,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:09:57,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 12:09:57,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:09:57,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4391 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 12:09:57,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641165331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:09:57,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:09:57,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2021-05-02 12:09:57,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898930963] [2021-05-02 12:09:57,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 12:09:57,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:09:57,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 12:09:57,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 12:09:57,505 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:09:57,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:09:57,733 INFO L93 Difference]: Finished difference Result 371 states and 376 transitions. [2021-05-02 12:09:57,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 12:09:57,734 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2021-05-02 12:09:57,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:09:57,734 INFO L225 Difference]: With dead ends: 371 [2021-05-02 12:09:57,735 INFO L226 Difference]: Without dead ends: 240 [2021-05-02 12:09:57,735 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 740.5ms TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 12:09:57,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-02 12:09:57,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 226. [2021-05-02 12:09:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.009049773755656) internal successors, (223), 221 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:09:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2021-05-02 12:09:57,738 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 223 [2021-05-02 12:09:57,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:09:57,738 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2021-05-02 12:09:57,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:09:57,738 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2021-05-02 12:09:57,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-05-02 12:09:57,739 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:09:57,739 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:09:57,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:09:57,964 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:09:57,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:09:57,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2116054200, now seen corresponding path program 43 times [2021-05-02 12:09:57,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:09:57,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059536540] [2021-05-02 12:09:57,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:09:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:09:58,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:09:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:09:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4478 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 12:09:58,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:09:58,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059536540] [2021-05-02 12:09:58,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059536540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:09:58,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996668046] [2021-05-02 12:09:58,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:09:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:09:59,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 12:09:59,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:09:59,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:09:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4478 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 12:09:59,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996668046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:09:59,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:09:59,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-05-02 12:09:59,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712121334] [2021-05-02 12:09:59,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 12:09:59,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:09:59,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 12:09:59,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 12:09:59,276 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 48 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:09:59,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:09:59,526 INFO L93 Difference]: Finished difference Result 377 states and 383 transitions. [2021-05-02 12:09:59,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 12:09:59,527 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 48 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2021-05-02 12:09:59,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:09:59,528 INFO L225 Difference]: With dead ends: 377 [2021-05-02 12:09:59,528 INFO L226 Difference]: Without dead ends: 246 [2021-05-02 12:09:59,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 845.7ms TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 12:09:59,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-02 12:09:59,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 228. [2021-05-02 12:09:59,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.0089686098654709) internal successors, (225), 223 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:09:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 229 transitions. [2021-05-02 12:09:59,532 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 229 transitions. Word has length 225 [2021-05-02 12:09:59,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:09:59,532 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 229 transitions. [2021-05-02 12:09:59,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 48 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:09:59,532 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 229 transitions. [2021-05-02 12:09:59,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-05-02 12:09:59,533 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:09:59,533 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:09:59,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 12:09:59,740 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:09:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:09:59,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1094302566, now seen corresponding path program 44 times [2021-05-02 12:09:59,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:09:59,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296805828] [2021-05-02 12:09:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:09:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:00,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:10:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4567 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 12:10:00,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:10:00,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296805828] [2021-05-02 12:10:00,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296805828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:00,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383036690] [2021-05-02 12:10:00,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:10:00,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:10:00,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:10:00,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 12:10:00,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:10:00,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:00,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4567 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 12:10:01,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383036690] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:01,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:10:01,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2021-05-02 12:10:01,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298617511] [2021-05-02 12:10:01,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 12:10:01,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:10:01,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 12:10:01,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 12:10:01,036 INFO L87 Difference]: Start difference. First operand 228 states and 229 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:01,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:10:01,355 INFO L93 Difference]: Finished difference Result 383 states and 390 transitions. [2021-05-02 12:10:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 12:10:01,355 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2021-05-02 12:10:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:10:01,356 INFO L225 Difference]: With dead ends: 383 [2021-05-02 12:10:01,356 INFO L226 Difference]: Without dead ends: 252 [2021-05-02 12:10:01,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 870.4ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 12:10:01,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-02 12:10:01,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 230. [2021-05-02 12:10:01,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.008888888888889) internal successors, (227), 225 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:01,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 231 transitions. [2021-05-02 12:10:01,359 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 231 transitions. Word has length 227 [2021-05-02 12:10:01,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:10:01,360 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 231 transitions. [2021-05-02 12:10:01,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:01,360 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 231 transitions. [2021-05-02 12:10:01,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-05-02 12:10:01,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:10:01,361 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:10:01,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 12:10:01,577 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:10:01,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:10:01,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1834331132, now seen corresponding path program 45 times [2021-05-02 12:10:01,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:10:01,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495738911] [2021-05-02 12:10:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:10:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:02,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:10:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4658 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 12:10:02,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:10:02,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495738911] [2021-05-02 12:10:02,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495738911] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:02,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150456413] [2021-05-02 12:10:02,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:11:04,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-05-02 12:11:04,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:11:04,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 12:11:04,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:11:04,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:04,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:05,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4658 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2021-05-02 12:11:05,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150456413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:05,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:11:05,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 46] total 53 [2021-05-02 12:11:05,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757818677] [2021-05-02 12:11:05,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 12:11:05,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:11:05,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 12:11:05,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1231, Invalid=1525, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 12:11:05,142 INFO L87 Difference]: Start difference. First operand 230 states and 231 transitions. Second operand has 53 states, 53 states have (on average 4.471698113207547) internal successors, (237), 51 states have internal predecessors, (237), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:05,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:11:05,508 INFO L93 Difference]: Finished difference Result 391 states and 399 transitions. [2021-05-02 12:11:05,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 12:11:05,508 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.471698113207547) internal successors, (237), 51 states have internal predecessors, (237), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2021-05-02 12:11:05,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:11:05,509 INFO L225 Difference]: With dead ends: 391 [2021-05-02 12:11:05,509 INFO L226 Difference]: Without dead ends: 252 [2021-05-02 12:11:05,510 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 978.1ms TimeCoverageRelationStatistics Valid=1241, Invalid=1729, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 12:11:05,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-02 12:11:05,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 250. [2021-05-02 12:11:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.0081632653061225) internal successors, (247), 245 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2021-05-02 12:11:05,513 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 229 [2021-05-02 12:11:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:11:05,513 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2021-05-02 12:11:05,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 4.471698113207547) internal successors, (237), 51 states have internal predecessors, (237), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:05,514 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2021-05-02 12:11:05,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-05-02 12:11:05,514 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:11:05,514 INFO L523 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:11:05,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 12:11:05,741 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:11:05,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:11:05,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2061353598, now seen corresponding path program 46 times [2021-05-02 12:11:05,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:11:05,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544603708] [2021-05-02 12:11:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:11:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:06,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:11:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5546 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2021-05-02 12:11:06,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:11:06,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544603708] [2021-05-02 12:11:06,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544603708] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:06,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967680666] [2021-05-02 12:11:06,726 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:11:06,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:11:06,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:11:06,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 12:11:06,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:11:06,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:06,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:07,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:07,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:07,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5546 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2021-05-02 12:11:07,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967680666] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:07,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:11:07,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2021-05-02 12:11:07,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861359408] [2021-05-02 12:11:07,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 12:11:07,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:11:07,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 12:11:07,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 12:11:07,115 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 51 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:07,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:11:07,415 INFO L93 Difference]: Finished difference Result 407 states and 410 transitions. [2021-05-02 12:11:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 12:11:07,416 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 51 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 249 [2021-05-02 12:11:07,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:11:07,417 INFO L225 Difference]: With dead ends: 407 [2021-05-02 12:11:07,417 INFO L226 Difference]: Without dead ends: 258 [2021-05-02 12:11:07,417 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 929.7ms TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 12:11:07,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-02 12:11:07,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 252. [2021-05-02 12:11:07,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.008097165991903) internal successors, (249), 247 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:07,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2021-05-02 12:11:07,421 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 249 [2021-05-02 12:11:07,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:11:07,421 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2021-05-02 12:11:07,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 51 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:07,421 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2021-05-02 12:11:07,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-05-02 12:11:07,422 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:11:07,422 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:11:07,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:11:07,639 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:11:07,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:11:07,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1613589408, now seen corresponding path program 47 times [2021-05-02 12:11:07,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:11:07,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632985459] [2021-05-02 12:11:07,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:11:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:08,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:11:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5641 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2021-05-02 12:11:08,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:11:08,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632985459] [2021-05-02 12:11:08,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632985459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:08,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320941544] [2021-05-02 12:11:08,677 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:11:26,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-05-02 12:11:26,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:11:26,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 12:11:26,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:11:26,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:26,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:26,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:26,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:26,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:26,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:26,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:26,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:26,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:26,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:26,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:26,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5641 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2021-05-02 12:11:27,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320941544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:27,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:11:27,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2021-05-02 12:11:27,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174450313] [2021-05-02 12:11:27,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 12:11:27,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:11:27,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 12:11:27,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 12:11:27,251 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 52 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:27,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:11:27,524 INFO L93 Difference]: Finished difference Result 413 states and 417 transitions. [2021-05-02 12:11:27,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 12:11:27,525 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 52 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2021-05-02 12:11:27,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:11:27,526 INFO L225 Difference]: With dead ends: 413 [2021-05-02 12:11:27,526 INFO L226 Difference]: Without dead ends: 264 [2021-05-02 12:11:27,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 982.0ms TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 12:11:27,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-02 12:11:27,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 254. [2021-05-02 12:11:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.0080321285140563) internal successors, (251), 249 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:27,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 255 transitions. [2021-05-02 12:11:27,550 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 255 transitions. Word has length 251 [2021-05-02 12:11:27,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:11:27,550 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 255 transitions. [2021-05-02 12:11:27,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 52 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:27,550 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 255 transitions. [2021-05-02 12:11:27,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-05-02 12:11:27,551 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:11:27,551 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 48, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:11:27,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:11:27,771 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:11:27,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:11:27,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1524266434, now seen corresponding path program 48 times [2021-05-02 12:11:27,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:11:27,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353245606] [2021-05-02 12:11:27,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:11:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:28,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:11:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2021-05-02 12:11:28,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:11:28,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353245606] [2021-05-02 12:11:28,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353245606] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:28,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574009626] [2021-05-02 12:11:28,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:18:04,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2021-05-02 12:18:04,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:18:04,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 12:18:04,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:18:04,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:04,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 2401 trivial. 0 not checked. [2021-05-02 12:18:05,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574009626] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:18:05,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:18:05,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 56 [2021-05-02 12:18:05,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004047165] [2021-05-02 12:18:05,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 12:18:05,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:18:05,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 12:18:05,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1384, Invalid=1696, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 12:18:05,038 INFO L87 Difference]: Start difference. First operand 254 states and 255 transitions. Second operand has 56 states, 56 states have (on average 4.660714285714286) internal successors, (261), 54 states have internal predecessors, (261), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:18:05,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:18:05,407 INFO L93 Difference]: Finished difference Result 421 states and 426 transitions. [2021-05-02 12:18:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 12:18:05,407 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 4.660714285714286) internal successors, (261), 54 states have internal predecessors, (261), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 253 [2021-05-02 12:18:05,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:18:05,408 INFO L225 Difference]: With dead ends: 421 [2021-05-02 12:18:05,408 INFO L226 Difference]: Without dead ends: 267 [2021-05-02 12:18:05,408 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1097.4ms TimeCoverageRelationStatistics Valid=1394, Invalid=1912, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 12:18:05,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-05-02 12:18:05,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2021-05-02 12:18:05,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0076923076923077) internal successors, (262), 260 states have internal predecessors, (262), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:18:05,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2021-05-02 12:18:05,412 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 253 [2021-05-02 12:18:05,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:18:05,412 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2021-05-02 12:18:05,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 4.660714285714286) internal successors, (261), 54 states have internal predecessors, (261), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:18:05,412 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2021-05-02 12:18:05,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-05-02 12:18:05,413 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:18:05,413 INFO L523 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:18:05,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:18:05,636 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:18:05,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:18:05,636 INFO L82 PathProgramCache]: Analyzing trace with hash 774474323, now seen corresponding path program 49 times [2021-05-02 12:18:05,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:18:05,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686599896] [2021-05-02 12:18:05,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:18:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:18:06,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:18:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:18:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6275 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2021-05-02 12:18:06,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:18:06,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686599896] [2021-05-02 12:18:06,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686599896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:18:06,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795028328] [2021-05-02 12:18:06,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:18:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:18:06,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 12:18:06,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:18:06,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:06,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6275 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2021-05-02 12:18:07,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795028328] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:18:07,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:18:07,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2021-05-02 12:18:07,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4020855] [2021-05-02 12:18:07,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 12:18:07,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:18:07,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 12:18:07,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 12:18:07,091 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand has 55 states, 55 states have (on average 2.109090909090909) internal successors, (116), 54 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:18:07,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:18:07,451 INFO L93 Difference]: Finished difference Result 431 states and 434 transitions. [2021-05-02 12:18:07,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 12:18:07,451 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.109090909090909) internal successors, (116), 54 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 264 [2021-05-02 12:18:07,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:18:07,452 INFO L225 Difference]: With dead ends: 431 [2021-05-02 12:18:07,452 INFO L226 Difference]: Without dead ends: 273 [2021-05-02 12:18:07,453 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1018.3ms TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 12:18:07,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-05-02 12:18:07,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 267. [2021-05-02 12:18:07,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.0076335877862594) internal successors, (264), 262 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:18:07,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2021-05-02 12:18:07,456 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 264 [2021-05-02 12:18:07,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:18:07,456 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2021-05-02 12:18:07,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.109090909090909) internal successors, (116), 54 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:18:07,456 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2021-05-02 12:18:07,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-02 12:18:07,457 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:18:07,457 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 51, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:18:07,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:18:07,674 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:18:07,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:18:07,674 INFO L82 PathProgramCache]: Analyzing trace with hash 548707445, now seen corresponding path program 50 times [2021-05-02 12:18:07,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:18:07,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214969035] [2021-05-02 12:18:07,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:18:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:18:08,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:18:08,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:18:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6376 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2021-05-02 12:18:08,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:18:08,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214969035] [2021-05-02 12:18:08,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214969035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:18:08,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931244908] [2021-05-02 12:18:08,826 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:18:08,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:18:08,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:18:08,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 12:18:08,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:18:08,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:08,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6376 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2021-05-02 12:18:09,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931244908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:18:09,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:18:09,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 56 [2021-05-02 12:18:09,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902380656] [2021-05-02 12:18:09,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 12:18:09,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:18:09,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 12:18:09,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 12:18:09,204 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand has 56 states, 56 states have (on average 2.107142857142857) internal successors, (118), 55 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:18:09,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:18:09,532 INFO L93 Difference]: Finished difference Result 437 states and 441 transitions. [2021-05-02 12:18:09,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 12:18:09,532 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.107142857142857) internal successors, (118), 55 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 266 [2021-05-02 12:18:09,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:18:09,533 INFO L225 Difference]: With dead ends: 437 [2021-05-02 12:18:09,533 INFO L226 Difference]: Without dead ends: 279 [2021-05-02 12:18:09,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1073.7ms TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 12:18:09,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-05-02 12:18:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 269. [2021-05-02 12:18:09,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.0075757575757576) internal successors, (266), 264 states have internal predecessors, (266), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:18:09,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2021-05-02 12:18:09,537 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 266 [2021-05-02 12:18:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:18:09,537 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2021-05-02 12:18:09,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.107142857142857) internal successors, (118), 55 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:18:09,537 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2021-05-02 12:18:09,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-05-02 12:18:09,538 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:18:09,538 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 51, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:18:09,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-02 12:18:09,754 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:18:09,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:18:09,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1664897513, now seen corresponding path program 51 times [2021-05-02 12:18:09,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:18:09,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021650698] [2021-05-02 12:18:09,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:18:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:18:10,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:18:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:18:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6479 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2021-05-02 12:18:10,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:18:10,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021650698] [2021-05-02 12:18:10,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021650698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:18:10,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318859619] [2021-05-02 12:18:10,925 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true