/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/loops-crafted-1/mono-crafted_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:08:32,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:08:32,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:08:33,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:08:33,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:08:33,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:08:33,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:08:33,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:08:33,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:08:33,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:08:33,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:08:33,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:08:33,052 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:08:33,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:08:33,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:08:33,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:08:33,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:08:33,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:08:33,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:08:33,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:08:33,074 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 13:08:33,103 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:08:33,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:08:33,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:08:33,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:08:33,106 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:08:33,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:08:33,106 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:08:33,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:08:33,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:08:33,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:08:33,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:08:33,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:08:33,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:08:33,107 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:08:33,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:08:33,107 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:08:33,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:08:33,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:08:33,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:08:33,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:08:33,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:08:33,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:08:33,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:08:33,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:08:33,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:08:33,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:08:33,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:08:33,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:08:33,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:08:33,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:08:33,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:08:33,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:08:33,402 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:08:33,403 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:08:33,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2021-05-02 13:08:33,460 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c906112d/8fce397d2cac449d811832fc6956887a/FLAG0ec036cd4 [2021-05-02 13:08:33,896 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:08:33,896 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2021-05-02 13:08:33,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c906112d/8fce397d2cac449d811832fc6956887a/FLAG0ec036cd4 [2021-05-02 13:08:33,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c906112d/8fce397d2cac449d811832fc6956887a [2021-05-02 13:08:33,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:08:33,924 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:08:33,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:08:33,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:08:33,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:08:33,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:08:33" (1/1) ... [2021-05-02 13:08:33,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a46c467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:08:33, skipping insertion in model container [2021-05-02 13:08:33,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:08:33" (1/1) ... [2021-05-02 13:08:33,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:08:33,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:08:34,065 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c[318,331] [2021-05-02 13:08:34,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:08:34,078 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:08:34,127 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c[318,331] [2021-05-02 13:08:34,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:08:34,141 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:08:34,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:08:34 WrapperNode [2021-05-02 13:08:34,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:08:34,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:08:34,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:08:34,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:08:34,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:08:34" (1/1) ... [2021-05-02 13:08:34,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:08:34" (1/1) ... [2021-05-02 13:08:34,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:08:34" (1/1) ... [2021-05-02 13:08:34,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:08:34" (1/1) ... [2021-05-02 13:08:34,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:08:34" (1/1) ... [2021-05-02 13:08:34,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:08:34" (1/1) ... [2021-05-02 13:08:34,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:08:34" (1/1) ... [2021-05-02 13:08:34,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:08:34,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:08:34,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:08:34,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:08:34,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:08:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:08:34,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:08:34,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:08:34,243 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:08:34,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:08:34,243 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:08:34,243 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:08:34,244 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:08:34,244 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:08:34,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:08:34,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:08:34,245 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:08:34,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:08:34,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:08:34,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:08:34,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:08:34,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:08:34,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:08:34,434 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:08:34,435 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 13:08:34,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:08:34 BoogieIcfgContainer [2021-05-02 13:08:34,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:08:34,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:08:34,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:08:34,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:08:34,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:08:33" (1/3) ... [2021-05-02 13:08:34,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b02e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:08:34, skipping insertion in model container [2021-05-02 13:08:34,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:08:34" (2/3) ... [2021-05-02 13:08:34,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b02e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:08:34, skipping insertion in model container [2021-05-02 13:08:34,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:08:34" (3/3) ... [2021-05-02 13:08:34,441 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_3.c [2021-05-02 13:08:34,473 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:08:34,476 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:08:34,488 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:08:34,520 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:08:34,528 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:08:34,529 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:08:34,529 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:08:34,529 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:08:34,529 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:08:34,529 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:08:34,529 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:08:34,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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 13:08:34,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 13:08:34,559 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:34,560 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:34,560 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:34,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:34,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1168619535, now seen corresponding path program 1 times [2021-05-02 13:08:34,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:34,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722183726] [2021-05-02 13:08:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:34,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:08:34,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:34,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722183726] [2021-05-02 13:08:34,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722183726] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:08:34,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:08:34,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:08:34,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190765888] [2021-05-02 13:08:34,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:08:34,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:34,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:08:34,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:08:34,788 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 13:08:34,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:34,832 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2021-05-02 13:08:34,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:08:34,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2021-05-02 13:08:34,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:34,838 INFO L225 Difference]: With dead ends: 34 [2021-05-02 13:08:34,838 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 13:08:34,841 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:08:34,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 13:08:34,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 13:08:34,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 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 13:08:34,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-05-02 13:08:34,873 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2021-05-02 13:08:34,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:34,873 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-05-02 13:08:34,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 13:08:34,874 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-05-02 13:08:34,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 13:08:34,875 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:34,875 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:34,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:08:34,875 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:34,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:34,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1458605129, now seen corresponding path program 1 times [2021-05-02 13:08:34,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:34,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983181249] [2021-05-02 13:08:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:34,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:08:34,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:34,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983181249] [2021-05-02 13:08:34,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983181249] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:08:34,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:08:34,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 13:08:34,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411874260] [2021-05-02 13:08:34,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 13:08:34,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:34,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 13:08:34,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 13:08:34,986 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 13:08:35,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:35,043 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-05-02 13:08:35,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 13:08:35,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2021-05-02 13:08:35,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:35,044 INFO L225 Difference]: With dead ends: 24 [2021-05-02 13:08:35,045 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 13:08:35,045 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:08:35,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 13:08:35,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-02 13:08:35,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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 13:08:35,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-05-02 13:08:35,058 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2021-05-02 13:08:35,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:35,058 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-05-02 13:08:35,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 13:08:35,058 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-05-02 13:08:35,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 13:08:35,059 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:35,059 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:35,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 13:08:35,060 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:35,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:35,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1316432198, now seen corresponding path program 1 times [2021-05-02 13:08:35,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:35,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787437924] [2021-05-02 13:08:35,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:35,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:08:35,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:35,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787437924] [2021-05-02 13:08:35,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787437924] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:08:35,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:08:35,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 13:08:35,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123811008] [2021-05-02 13:08:35,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 13:08:35,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:35,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 13:08:35,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 13:08:35,147 INFO L87 Difference]: Start difference. First operand 16 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 13:08:35,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:35,204 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-02 13:08:35,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 13:08:35,204 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 13:08:35,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:35,205 INFO L225 Difference]: With dead ends: 22 [2021-05-02 13:08:35,205 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 13:08:35,206 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:08:35,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 13:08:35,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 13:08:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 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 13:08:35,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 13:08:35,209 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2021-05-02 13:08:35,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:35,209 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 13:08:35,209 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 13:08:35,209 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 13:08:35,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 13:08:35,210 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:35,210 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:35,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 13:08:35,213 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:35,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:35,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2119154711, now seen corresponding path program 1 times [2021-05-02 13:08:35,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:35,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486577705] [2021-05-02 13:08:35,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:35,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:08:35,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:35,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486577705] [2021-05-02 13:08:35,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486577705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:35,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779974375] [2021-05-02 13:08:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:35,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 13:08:35,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:35,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:35,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:08:35,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779974375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:35,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:35,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 13:08:35,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84959443] [2021-05-02 13:08:35,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:08:35,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:35,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:08:35,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:08:35,369 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 13:08:35,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:35,489 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-05-02 13:08:35,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 13:08:35,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2021-05-02 13:08:35,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:35,491 INFO L225 Difference]: With dead ends: 28 [2021-05-02 13:08:35,491 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 13:08:35,493 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:08:35,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 13:08:35,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 13:08:35,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 13:08:35,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 13:08:35,500 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2021-05-02 13:08:35,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:35,500 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 13:08:35,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 13:08:35,501 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 13:08:35,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:08:35,501 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:35,501 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:35,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:35,702 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:35,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:35,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1483121146, now seen corresponding path program 2 times [2021-05-02 13:08:35,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:35,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788441708] [2021-05-02 13:08:35,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:35,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 13:08:35,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:35,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788441708] [2021-05-02 13:08:35,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788441708] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:08:35,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:08:35,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 13:08:35,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497055376] [2021-05-02 13:08:35,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 13:08:35,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:35,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 13:08:35,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 13:08:35,742 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 13:08:35,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:35,780 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-02 13:08:35,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 13:08:35,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 17 [2021-05-02 13:08:35,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:35,781 INFO L225 Difference]: With dead ends: 28 [2021-05-02 13:08:35,781 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 13:08:35,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:08:35,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 13:08:35,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-05-02 13:08:35,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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 13:08:35,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-05-02 13:08:35,785 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2021-05-02 13:08:35,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:35,785 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-05-02 13:08:35,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 13:08:35,785 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-05-02 13:08:35,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 13:08:35,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:35,785 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:35,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 13:08:35,786 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:35,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:35,786 INFO L82 PathProgramCache]: Analyzing trace with hash -949567839, now seen corresponding path program 1 times [2021-05-02 13:08:35,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:35,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639021454] [2021-05-02 13:08:35,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:35,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:08:35,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:35,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639021454] [2021-05-02 13:08:35,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639021454] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:35,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499123987] [2021-05-02 13:08:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:35,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 13:08:35,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:35,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:35,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:35,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:35,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:08:35,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499123987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:35,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:35,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 13:08:35,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200826491] [2021-05-02 13:08:35,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 13:08:35,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:35,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 13:08:35,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:08:35,943 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 13:08:36,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:36,038 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-05-02 13:08:36,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 13:08:36,039 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 19 [2021-05-02 13:08:36,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:36,039 INFO L225 Difference]: With dead ends: 32 [2021-05-02 13:08:36,040 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 13:08:36,040 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:08:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 13:08:36,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 13:08:36,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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 13:08:36,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-05-02 13:08:36,043 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2021-05-02 13:08:36,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:36,043 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-05-02 13:08:36,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 13:08:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-05-02 13:08:36,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 13:08:36,044 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:36,044 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:36,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:36,257 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:36,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:36,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1087078974, now seen corresponding path program 2 times [2021-05-02 13:08:36,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:36,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997242260] [2021-05-02 13:08:36,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:36,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:08:36,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:36,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997242260] [2021-05-02 13:08:36,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997242260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:36,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422393443] [2021-05-02 13:08:36,311 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 13:08:36,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:08:36,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:36,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 13:08:36,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:36,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:08:36,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422393443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:36,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:36,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 13:08:36,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358399434] [2021-05-02 13:08:36,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:08:36,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:36,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:08:36,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:08:36,406 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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 13:08:36,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:36,520 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-02 13:08:36,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:08:36,521 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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 21 [2021-05-02 13:08:36,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:36,521 INFO L225 Difference]: With dead ends: 34 [2021-05-02 13:08:36,521 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 13:08:36,521 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:08:36,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 13:08:36,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 13:08:36,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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 13:08:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-02 13:08:36,525 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2021-05-02 13:08:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:36,525 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-02 13:08:36,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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 13:08:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-02 13:08:36,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 13:08:36,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:36,526 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:36,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:36,737 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:36,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:36,738 INFO L82 PathProgramCache]: Analyzing trace with hash -200420709, now seen corresponding path program 3 times [2021-05-02 13:08:36,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:36,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355754432] [2021-05-02 13:08:36,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:36,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:08:36,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:36,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355754432] [2021-05-02 13:08:36,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355754432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:36,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753393429] [2021-05-02 13:08:36,817 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 13:08:36,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 13:08:36,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:36,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 13:08:36,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:36,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-05-02 13:08:36,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753393429] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:36,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:36,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-05-02 13:08:36,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830517931] [2021-05-02 13:08:36,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:08:36,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:36,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:08:36,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:08:36,946 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 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 13:08:37,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:37,242 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-05-02 13:08:37,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:08:37,242 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 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 23 [2021-05-02 13:08:37,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:37,243 INFO L225 Difference]: With dead ends: 39 [2021-05-02 13:08:37,243 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 13:08:37,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 259.9ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:08:37,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 13:08:37,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-05-02 13:08:37,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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 13:08:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-02 13:08:37,247 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2021-05-02 13:08:37,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:37,247 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-02 13:08:37,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 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 13:08:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-02 13:08:37,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 13:08:37,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:37,248 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:37,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:37,453 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:37,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:37,454 INFO L82 PathProgramCache]: Analyzing trace with hash 567327403, now seen corresponding path program 4 times [2021-05-02 13:08:37,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:37,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579190192] [2021-05-02 13:08:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:37,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:37,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 13:08:37,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:37,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579190192] [2021-05-02 13:08:37,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579190192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:37,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234591950] [2021-05-02 13:08:37,548 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 13:08:37,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:08:37,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:37,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 13:08:37,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:37,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 13:08:37,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234591950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:37,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:37,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 13:08:37,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551324437] [2021-05-02 13:08:37,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:08:37,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:37,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:08:37,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:08:37,685 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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 13:08:37,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:37,845 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-02 13:08:37,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:08:37,845 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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 26 [2021-05-02 13:08:37,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:37,846 INFO L225 Difference]: With dead ends: 40 [2021-05-02 13:08:37,846 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 13:08:37,846 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:08:37,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 13:08:37,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 13:08:37,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 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 13:08:37,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-02 13:08:37,850 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2021-05-02 13:08:37,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:37,850 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-02 13:08:37,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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 13:08:37,850 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-02 13:08:37,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 13:08:37,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:37,850 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:38,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:38,057 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:38,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:38,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1244863598, now seen corresponding path program 5 times [2021-05-02 13:08:38,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:38,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791417400] [2021-05-02 13:08:38,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:38,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 13:08:38,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:38,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791417400] [2021-05-02 13:08:38,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791417400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:38,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011009295] [2021-05-02 13:08:38,125 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 13:08:38,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 13:08:38,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:38,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 13:08:38,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:38,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:38,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:38,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:38,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:38,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:38,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:38,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:38,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:38,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:38,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:38,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:38,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 13:08:38,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011009295] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:38,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:38,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-02 13:08:38,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097836328] [2021-05-02 13:08:38,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:08:38,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:38,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:08:38,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:08:38,297 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 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 13:08:38,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:38,498 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-02 13:08:38,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:08:38,498 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 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 28 [2021-05-02 13:08:38,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:38,499 INFO L225 Difference]: With dead ends: 42 [2021-05-02 13:08:38,499 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 13:08:38,499 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2021-05-02 13:08:38,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 13:08:38,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 13:08:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 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 13:08:38,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-05-02 13:08:38,503 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2021-05-02 13:08:38,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:38,503 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-05-02 13:08:38,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 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 13:08:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-05-02 13:08:38,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 13:08:38,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:38,504 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:38,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:38,717 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:38,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:38,718 INFO L82 PathProgramCache]: Analyzing trace with hash -477881999, now seen corresponding path program 6 times [2021-05-02 13:08:38,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:38,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489222634] [2021-05-02 13:08:38,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:38,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:38,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 13:08:38,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:38,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489222634] [2021-05-02 13:08:38,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489222634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:38,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336249611] [2021-05-02 13:08:38,803 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 13:08:38,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-02 13:08:38,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:38,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 13:08:38,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:38,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:38,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:38,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:38,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:38,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:38,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-05-02 13:08:38,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336249611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:38,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:38,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2021-05-02 13:08:38,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380091416] [2021-05-02 13:08:38,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 13:08:38,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:38,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 13:08:38,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:08:38,929 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 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 13:08:39,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:39,342 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2021-05-02 13:08:39,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 13:08:39,343 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 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 30 [2021-05-02 13:08:39,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:39,343 INFO L225 Difference]: With dead ends: 47 [2021-05-02 13:08:39,343 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 13:08:39,344 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 372.6ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-05-02 13:08:39,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 13:08:39,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-05-02 13:08:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 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 13:08:39,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-05-02 13:08:39,347 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 30 [2021-05-02 13:08:39,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:39,347 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-05-02 13:08:39,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 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 13:08:39,348 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-05-02 13:08:39,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 13:08:39,348 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:39,348 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:39,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:39,553 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:39,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:39,554 INFO L82 PathProgramCache]: Analyzing trace with hash 651204655, now seen corresponding path program 7 times [2021-05-02 13:08:39,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:39,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103786882] [2021-05-02 13:08:39,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:39,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:39,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:08:39,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:39,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103786882] [2021-05-02 13:08:39,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103786882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:39,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481516114] [2021-05-02 13:08:39,639 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 13:08:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:39,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 13:08:39,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:39,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:39,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:39,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:39,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:39,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:39,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:39,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:39,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:39,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:39,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:39,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:39,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:39,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:39,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:39,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:39,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:08:39,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481516114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:39,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:39,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-02 13:08:39,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119383074] [2021-05-02 13:08:39,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:08:39,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:39,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:08:39,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:08:39,756 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 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 13:08:39,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:39,964 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-05-02 13:08:39,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:08:39,964 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 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 33 [2021-05-02 13:08:39,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:39,965 INFO L225 Difference]: With dead ends: 48 [2021-05-02 13:08:39,965 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 13:08:39,965 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:08:39,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 13:08:39,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 13:08:39,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 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 13:08:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-05-02 13:08:39,969 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2021-05-02 13:08:39,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:39,969 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-05-02 13:08:39,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 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 13:08:39,969 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-05-02 13:08:39,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 13:08:39,970 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:39,970 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:40,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 13:08:40,187 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:40,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:40,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1632353012, now seen corresponding path program 8 times [2021-05-02 13:08:40,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:40,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045724414] [2021-05-02 13:08:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:40,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:08:40,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:40,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045724414] [2021-05-02 13:08:40,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045724414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:40,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606318018] [2021-05-02 13:08:40,271 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 13:08:40,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:08:40,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:40,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 13:08:40,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:40,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:40,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:40,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:40,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:40,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:40,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:40,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:40,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:40,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:40,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:40,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:40,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:40,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:40,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:40,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:40,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:40,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:40,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:08:40,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606318018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:40,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:40,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-02 13:08:40,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521941928] [2021-05-02 13:08:40,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:08:40,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:40,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:08:40,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:08:40,408 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 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 13:08:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:40,687 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-05-02 13:08:40,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 13:08:40,688 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 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 35 [2021-05-02 13:08:40,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:40,688 INFO L225 Difference]: With dead ends: 50 [2021-05-02 13:08:40,689 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 13:08:40,689 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 249.6ms TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2021-05-02 13:08:40,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 13:08:40,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 13:08:40,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 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 13:08:40,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-05-02 13:08:40,693 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2021-05-02 13:08:40,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:40,693 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-05-02 13:08:40,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 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 13:08:40,693 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-05-02 13:08:40,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 13:08:40,694 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:40,694 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:40,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:40,911 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:40,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:40,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1402982743, now seen corresponding path program 9 times [2021-05-02 13:08:40,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:40,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709712401] [2021-05-02 13:08:40,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:41,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:41,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:08:41,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:41,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709712401] [2021-05-02 13:08:41,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709712401] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:41,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251022679] [2021-05-02 13:08:41,015 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 13:08:41,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 13:08:41,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:41,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 13:08:41,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:41,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:41,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:41,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:41,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:41,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:41,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:41,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:41,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-05-02 13:08:41,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251022679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:41,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:41,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2021-05-02 13:08:41,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476593523] [2021-05-02 13:08:41,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 13:08:41,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:41,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 13:08:41,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:08:41,155 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 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 13:08:41,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:41,703 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-05-02 13:08:41,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 13:08:41,703 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 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 37 [2021-05-02 13:08:41,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:41,704 INFO L225 Difference]: With dead ends: 55 [2021-05-02 13:08:41,704 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 13:08:41,705 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 514.7ms TimeCoverageRelationStatistics Valid=382, Invalid=808, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 13:08:41,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 13:08:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-05-02 13:08:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 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 13:08:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-02 13:08:41,708 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2021-05-02 13:08:41,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:41,708 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-02 13:08:41,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 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 13:08:41,708 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-02 13:08:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 13:08:41,709 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:41,709 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:41,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:41,925 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:41,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:41,926 INFO L82 PathProgramCache]: Analyzing trace with hash -630538467, now seen corresponding path program 10 times [2021-05-02 13:08:41,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:41,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641667000] [2021-05-02 13:08:41,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:42,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 13:08:42,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:42,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641667000] [2021-05-02 13:08:42,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641667000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:42,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056679099] [2021-05-02 13:08:42,034 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 13:08:42,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:08:42,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:42,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 13:08:42,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:42,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 13:08:42,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056679099] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:42,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:42,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-02 13:08:42,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947481115] [2021-05-02 13:08:42,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 13:08:42,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:42,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 13:08:42,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:08:42,166 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 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 13:08:42,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:42,485 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-05-02 13:08:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 13:08:42,486 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 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 40 [2021-05-02 13:08:42,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:42,486 INFO L225 Difference]: With dead ends: 56 [2021-05-02 13:08:42,486 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 13:08:42,486 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 336.8ms TimeCoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2021-05-02 13:08:42,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 13:08:42,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 13:08:42,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 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 13:08:42,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-05-02 13:08:42,496 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2021-05-02 13:08:42,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:42,496 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-05-02 13:08:42,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 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 13:08:42,496 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-05-02 13:08:42,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 13:08:42,499 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:42,500 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:42,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 13:08:42,711 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:42,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:42,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1152470944, now seen corresponding path program 11 times [2021-05-02 13:08:42,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:42,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339356221] [2021-05-02 13:08:42,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:42,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 13:08:42,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:42,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339356221] [2021-05-02 13:08:42,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339356221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:42,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30405113] [2021-05-02 13:08:42,822 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 13:08:42,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-02 13:08:42,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:42,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 13:08:42,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:42,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 13:08:42,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30405113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:42,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:42,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-05-02 13:08:42,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220691450] [2021-05-02 13:08:42,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 13:08:42,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:42,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 13:08:42,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:08:42,947 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 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 13:08:43,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:43,328 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-05-02 13:08:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 13:08:43,329 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 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 42 [2021-05-02 13:08:43,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:43,329 INFO L225 Difference]: With dead ends: 58 [2021-05-02 13:08:43,329 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 13:08:43,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=331, Invalid=539, Unknown=0, NotChecked=0, Total=870 [2021-05-02 13:08:43,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 13:08:43,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 13:08:43,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.075) internal successors, (43), 40 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 13:08:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-05-02 13:08:43,333 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2021-05-02 13:08:43,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:43,333 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-05-02 13:08:43,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 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 13:08:43,333 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-05-02 13:08:43,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 13:08:43,334 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:43,334 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:43,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 13:08:43,537 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:43,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:43,537 INFO L82 PathProgramCache]: Analyzing trace with hash 932563811, now seen corresponding path program 12 times [2021-05-02 13:08:43,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:43,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098866837] [2021-05-02 13:08:43,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:43,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 13:08:43,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:43,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098866837] [2021-05-02 13:08:43,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098866837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:43,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155544732] [2021-05-02 13:08:43,683 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 13:08:43,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 13:08:43,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:43,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 13:08:43,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:43,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:43,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:43,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:43,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:43,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:43,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:43,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:43,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:43,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:43,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-05-02 13:08:43,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155544732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:43,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:43,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 23 [2021-05-02 13:08:43,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081823566] [2021-05-02 13:08:43,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 13:08:43,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:43,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 13:08:43,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-05-02 13:08:43,832 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 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 13:08:44,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:44,492 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2021-05-02 13:08:44,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 13:08:44,492 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 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 44 [2021-05-02 13:08:44,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:44,493 INFO L225 Difference]: With dead ends: 63 [2021-05-02 13:08:44,493 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 13:08:44,494 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 667.3ms TimeCoverageRelationStatistics Valid=581, Invalid=1225, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 13:08:44,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 13:08:44,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-05-02 13:08:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 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 13:08:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-05-02 13:08:44,498 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 44 [2021-05-02 13:08:44,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:44,498 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-05-02 13:08:44,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 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 13:08:44,499 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-05-02 13:08:44,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 13:08:44,499 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:44,499 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:44,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 13:08:44,716 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:44,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:44,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1746939325, now seen corresponding path program 13 times [2021-05-02 13:08:44,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:44,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730149246] [2021-05-02 13:08:44,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:44,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 13:08:44,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:44,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730149246] [2021-05-02 13:08:44,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730149246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:44,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098511999] [2021-05-02 13:08:44,854 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 13:08:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:44,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 13:08:44,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:44,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 13:08:44,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098511999] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:44,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:44,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-05-02 13:08:44,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839561601] [2021-05-02 13:08:44,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 13:08:44,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:44,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 13:08:44,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:08:44,992 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 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 13:08:45,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:45,470 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2021-05-02 13:08:45,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 13:08:45,470 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 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 13:08:45,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:45,470 INFO L225 Difference]: With dead ends: 64 [2021-05-02 13:08:45,471 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 13:08:45,471 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 448.0ms TimeCoverageRelationStatistics Valid=426, Invalid=696, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 13:08:45,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 13:08:45,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-02 13:08:45,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 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 13:08:45,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-05-02 13:08:45,476 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2021-05-02 13:08:45,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:45,476 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-05-02 13:08:45,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 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 13:08:45,476 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-05-02 13:08:45,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 13:08:45,476 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:45,477 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:45,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:45,685 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:45,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:45,685 INFO L82 PathProgramCache]: Analyzing trace with hash -728656934, now seen corresponding path program 14 times [2021-05-02 13:08:45,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:45,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917839040] [2021-05-02 13:08:45,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:45,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 13:08:45,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:45,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917839040] [2021-05-02 13:08:45,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917839040] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:45,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610307005] [2021-05-02 13:08:45,857 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 13:08:45,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:08:45,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:45,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:08:45,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:45,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:45,991 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 13:08:45,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610307005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:45,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:45,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-05-02 13:08:45,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926068264] [2021-05-02 13:08:45,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 13:08:45,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:45,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 13:08:45,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 13:08:45,993 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 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 13:08:46,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:46,446 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2021-05-02 13:08:46,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 13:08:46,446 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 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 49 [2021-05-02 13:08:46,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:46,447 INFO L225 Difference]: With dead ends: 66 [2021-05-02 13:08:46,447 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 13:08:46,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 470.1ms TimeCoverageRelationStatistics Valid=478, Invalid=782, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 13:08:46,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 13:08:46,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-02 13:08:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 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 13:08:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-05-02 13:08:46,451 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2021-05-02 13:08:46,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:46,451 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-05-02 13:08:46,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 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 13:08:46,451 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-05-02 13:08:46,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 13:08:46,452 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:46,452 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:46,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:46,665 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:46,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:46,665 INFO L82 PathProgramCache]: Analyzing trace with hash -364779849, now seen corresponding path program 15 times [2021-05-02 13:08:46,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:46,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604643875] [2021-05-02 13:08:46,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:46,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 13:08:46,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:46,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604643875] [2021-05-02 13:08:46,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604643875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:46,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064945698] [2021-05-02 13:08:46,861 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 13:08:46,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 13:08:46,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:46,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 13:08:46,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:46,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:46,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:46,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:46,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-05-02 13:08:46,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064945698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:46,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:46,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 4] total 22 [2021-05-02 13:08:46,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601540079] [2021-05-02 13:08:46,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 13:08:46,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:46,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 13:08:46,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:08:46,974 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 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 13:08:47,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:47,483 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2021-05-02 13:08:47,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 13:08:47,483 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 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 51 [2021-05-02 13:08:47,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:47,485 INFO L225 Difference]: With dead ends: 71 [2021-05-02 13:08:47,485 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 13:08:47,486 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 573.9ms TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 13:08:47,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 13:08:47,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-05-02 13:08:47,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 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 13:08:47,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-05-02 13:08:47,489 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 51 [2021-05-02 13:08:47,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:47,489 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-05-02 13:08:47,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 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 13:08:47,490 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-05-02 13:08:47,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 13:08:47,490 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:47,490 INFO L523 BasicCegarLoop]: trace histogram [19, 17, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:47,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:47,707 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:47,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:47,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1715873263, now seen corresponding path program 16 times [2021-05-02 13:08:47,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:47,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252846929] [2021-05-02 13:08:47,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:47,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 13:08:47,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:47,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252846929] [2021-05-02 13:08:47,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252846929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:47,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633564047] [2021-05-02 13:08:47,876 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 13:08:47,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:08:47,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:47,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:08:47,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:47,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:47,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:47,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:47,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:47,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:47,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:47,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:47,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:47,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:47,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:47,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:47,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 13:08:48,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633564047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:48,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:48,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-05-02 13:08:48,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102915972] [2021-05-02 13:08:48,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 13:08:48,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:48,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 13:08:48,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:08:48,071 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 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 13:08:48,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:48,626 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2021-05-02 13:08:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 13:08:48,627 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 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 55 [2021-05-02 13:08:48,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:48,628 INFO L225 Difference]: With dead ends: 74 [2021-05-02 13:08:48,628 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 13:08:48,628 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 583.2ms TimeCoverageRelationStatistics Valid=591, Invalid=969, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 13:08:48,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 13:08:48,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 13:08:48,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 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 13:08:48,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2021-05-02 13:08:48,632 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 55 [2021-05-02 13:08:48,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:48,633 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2021-05-02 13:08:48,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 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 13:08:48,633 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2021-05-02 13:08:48,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 13:08:48,634 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:48,634 INFO L523 BasicCegarLoop]: trace histogram [20, 18, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:48,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 13:08:48,845 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:48,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:48,845 INFO L82 PathProgramCache]: Analyzing trace with hash -508420340, now seen corresponding path program 17 times [2021-05-02 13:08:48,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:48,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135058547] [2021-05-02 13:08:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:49,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 13:08:49,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:49,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135058547] [2021-05-02 13:08:49,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135058547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:49,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789401365] [2021-05-02 13:08:49,036 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 13:08:49,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-05-02 13:08:49,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:49,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 13:08:49,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:49,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 13:08:49,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789401365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:49,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:49,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2021-05-02 13:08:49,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224289978] [2021-05-02 13:08:49,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 13:08:49,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:49,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 13:08:49,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 13:08:49,179 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 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 13:08:49,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:49,780 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2021-05-02 13:08:49,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 13:08:49,780 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 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 57 [2021-05-02 13:08:49,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:49,781 INFO L225 Difference]: With dead ends: 76 [2021-05-02 13:08:49,781 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 13:08:49,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 620.7ms TimeCoverageRelationStatistics Valid=652, Invalid=1070, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 13:08:49,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 13:08:49,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 13:08:49,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 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 13:08:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-05-02 13:08:49,791 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 57 [2021-05-02 13:08:49,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:49,791 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-05-02 13:08:49,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 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 13:08:49,791 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-05-02 13:08:49,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 13:08:49,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:49,792 INFO L523 BasicCegarLoop]: trace histogram [21, 19, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:50,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 13:08:50,007 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:50,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:50,008 INFO L82 PathProgramCache]: Analyzing trace with hash 839140585, now seen corresponding path program 18 times [2021-05-02 13:08:50,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:50,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810581604] [2021-05-02 13:08:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:50,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 13:08:50,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:50,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810581604] [2021-05-02 13:08:50,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810581604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:50,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959679551] [2021-05-02 13:08:50,212 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 13:08:50,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 13:08:50,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:50,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 13:08:50,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:50,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:50,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:50,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:50,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:50,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:50,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:50,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:50,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:50,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:50,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:50,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:50,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:50,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:50,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 61 proven. 15 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-05-02 13:08:50,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959679551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:50,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:50,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 9] total 30 [2021-05-02 13:08:50,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698860826] [2021-05-02 13:08:50,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 13:08:50,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:50,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 13:08:50,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2021-05-02 13:08:50,410 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 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 13:08:51,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:51,352 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2021-05-02 13:08:51,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 13:08:51,353 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 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 59 [2021-05-02 13:08:51,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:51,353 INFO L225 Difference]: With dead ends: 85 [2021-05-02 13:08:51,353 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 13:08:51,354 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 983.6ms TimeCoverageRelationStatistics Valid=998, Invalid=2194, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 13:08:51,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 13:08:51,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2021-05-02 13:08:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 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 13:08:51,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2021-05-02 13:08:51,358 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 59 [2021-05-02 13:08:51,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:51,358 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-05-02 13:08:51,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 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 13:08:51,358 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2021-05-02 13:08:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 13:08:51,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:51,359 INFO L523 BasicCegarLoop]: trace histogram [22, 20, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:51,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 13:08:51,560 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:51,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:51,560 INFO L82 PathProgramCache]: Analyzing trace with hash 407293085, now seen corresponding path program 19 times [2021-05-02 13:08:51,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:51,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96544692] [2021-05-02 13:08:51,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:51,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-02 13:08:51,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:51,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96544692] [2021-05-02 13:08:51,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96544692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:51,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326593836] [2021-05-02 13:08:51,774 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 13:08:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:51,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 13:08:51,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:51,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-02 13:08:51,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326593836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:51,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:51,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-05-02 13:08:51,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301630671] [2021-05-02 13:08:51,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 13:08:51,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:51,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 13:08:51,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 13:08:51,937 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 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 13:08:52,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:52,512 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2021-05-02 13:08:52,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 13:08:52,513 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 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 62 [2021-05-02 13:08:52,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:52,513 INFO L225 Difference]: With dead ends: 82 [2021-05-02 13:08:52,513 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 13:08:52,514 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 674.2ms TimeCoverageRelationStatistics Valid=783, Invalid=1287, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 13:08:52,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 13:08:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 13:08:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 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 13:08:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-05-02 13:08:52,517 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 62 [2021-05-02 13:08:52,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:52,517 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-05-02 13:08:52,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 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 13:08:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-05-02 13:08:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 13:08:52,518 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:52,518 INFO L523 BasicCegarLoop]: trace histogram [23, 21, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:52,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 13:08:52,718 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:52,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:52,719 INFO L82 PathProgramCache]: Analyzing trace with hash -945633056, now seen corresponding path program 20 times [2021-05-02 13:08:52,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:52,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594752877] [2021-05-02 13:08:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:52,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-02 13:08:52,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:52,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594752877] [2021-05-02 13:08:52,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594752877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:52,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296417662] [2021-05-02 13:08:52,933 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 13:08:52,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:08:52,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:52,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 13:08:52,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:53,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-02 13:08:53,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296417662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:53,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:53,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2021-05-02 13:08:53,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067504032] [2021-05-02 13:08:53,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 13:08:53,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:53,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 13:08:53,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 13:08:53,100 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 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 13:08:53,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:53,757 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-05-02 13:08:53,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 13:08:53,757 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 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 64 [2021-05-02 13:08:53,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:53,758 INFO L225 Difference]: With dead ends: 84 [2021-05-02 13:08:53,758 INFO L226 Difference]: Without dead ends: 67 [2021-05-02 13:08:53,758 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 707.0ms TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 13:08:53,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-02 13:08:53,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-02 13:08:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 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 13:08:53,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-05-02 13:08:53,762 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 64 [2021-05-02 13:08:53,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:53,762 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-05-02 13:08:53,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 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 13:08:53,762 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-05-02 13:08:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 13:08:53,763 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:53,763 INFO L523 BasicCegarLoop]: trace histogram [24, 22, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:53,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 13:08:53,979 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:53,980 INFO L82 PathProgramCache]: Analyzing trace with hash 267436131, now seen corresponding path program 21 times [2021-05-02 13:08:53,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:53,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87430518] [2021-05-02 13:08:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:54,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 69 proven. 506 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-02 13:08:54,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:54,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87430518] [2021-05-02 13:08:54,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87430518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:54,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732533729] [2021-05-02 13:08:54,238 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 13:08:54,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 13:08:54,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:54,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 13:08:54,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:54,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:54,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:54,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:54,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:54,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:54,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:54,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:54,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:54,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:54,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:54,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:54,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:54,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:54,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:54,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:54,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 70 proven. 21 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-05-02 13:08:54,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732533729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:54,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:54,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2021-05-02 13:08:54,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778424338] [2021-05-02 13:08:54,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 13:08:54,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:54,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 13:08:54,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=776, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 13:08:54,459 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 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 13:08:55,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:55,605 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2021-05-02 13:08:55,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 13:08:55,606 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 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 66 [2021-05-02 13:08:55,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:55,606 INFO L225 Difference]: With dead ends: 93 [2021-05-02 13:08:55,606 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 13:08:55,607 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1204.1ms TimeCoverageRelationStatistics Valid=1308, Invalid=2852, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 13:08:55,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 13:08:55,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2021-05-02 13:08:55,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 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 13:08:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2021-05-02 13:08:55,611 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 66 [2021-05-02 13:08:55,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:55,611 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2021-05-02 13:08:55,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 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 13:08:55,611 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2021-05-02 13:08:55,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 13:08:55,612 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:55,612 INFO L523 BasicCegarLoop]: trace histogram [25, 23, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:55,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:55,812 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:55,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:55,813 INFO L82 PathProgramCache]: Analyzing trace with hash 425444605, now seen corresponding path program 22 times [2021-05-02 13:08:55,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:55,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635530066] [2021-05-02 13:08:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:56,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 13:08:56,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:56,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635530066] [2021-05-02 13:08:56,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635530066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:56,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179272979] [2021-05-02 13:08:56,069 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 13:08:56,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:08:56,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:56,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 13:08:56,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:56,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 13:08:56,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179272979] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:56,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:56,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2021-05-02 13:08:56,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756615449] [2021-05-02 13:08:56,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 13:08:56,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:56,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 13:08:56,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 13:08:56,237 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 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 13:08:56,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:56,966 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2021-05-02 13:08:56,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 13:08:56,967 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 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 13:08:56,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:56,967 INFO L225 Difference]: With dead ends: 90 [2021-05-02 13:08:56,967 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 13:08:56,968 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 819.6ms TimeCoverageRelationStatistics Valid=1002, Invalid=1650, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 13:08:56,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 13:08:56,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-05-02 13:08:56,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 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 13:08:56,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2021-05-02 13:08:56,972 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 69 [2021-05-02 13:08:56,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:56,972 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2021-05-02 13:08:56,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 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 13:08:56,972 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2021-05-02 13:08:56,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 13:08:56,972 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:56,973 INFO L523 BasicCegarLoop]: trace histogram [26, 24, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:57,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 13:08:57,177 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:57,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:57,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1438320474, now seen corresponding path program 23 times [2021-05-02 13:08:57,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:57,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685812192] [2021-05-02 13:08:57,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:57,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 13:08:57,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:57,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685812192] [2021-05-02 13:08:57,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685812192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:57,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673639647] [2021-05-02 13:08:57,464 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 13:08:57,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2021-05-02 13:08:57,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:57,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 13:08:57,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:57,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 13:08:57,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673639647] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:57,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:57,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2021-05-02 13:08:57,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039630310] [2021-05-02 13:08:57,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 13:08:57,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:57,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 13:08:57,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 13:08:57,647 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 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 13:08:58,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:58,408 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2021-05-02 13:08:58,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 13:08:58,409 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 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 13:08:58,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:58,409 INFO L225 Difference]: With dead ends: 92 [2021-05-02 13:08:58,410 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 13:08:58,410 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 851.7ms TimeCoverageRelationStatistics Valid=1081, Invalid=1781, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 13:08:58,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 13:08:58,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-02 13:08:58,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 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 13:08:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-05-02 13:08:58,415 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 71 [2021-05-02 13:08:58,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:58,415 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-05-02 13:08:58,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 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 13:08:58,415 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-05-02 13:08:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 13:08:58,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:58,416 INFO L523 BasicCegarLoop]: trace histogram [27, 25, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:58,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:58,616 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:58,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:58,617 INFO L82 PathProgramCache]: Analyzing trace with hash -145545609, now seen corresponding path program 24 times [2021-05-02 13:08:58,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:58,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18619675] [2021-05-02 13:08:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:58,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 13:08:58,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:58,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18619675] [2021-05-02 13:08:58,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18619675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:58,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502901744] [2021-05-02 13:08:58,919 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 13:08:58,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-02 13:08:58,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:58,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 13:08:58,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:59,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:59,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:59,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:59,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:59,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:59,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:59,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:59,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:59,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:59,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:59,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:59,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:59,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:59,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:59,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:59,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:59,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:59,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 79 proven. 28 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-05-02 13:08:59,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502901744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:59,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:59,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11] total 38 [2021-05-02 13:08:59,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497688484] [2021-05-02 13:08:59,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 13:08:59,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:59,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 13:08:59,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=972, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 13:08:59,156 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 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 13:09:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:00,431 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2021-05-02 13:09:00,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 13:09:00,431 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 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 13:09:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:00,432 INFO L225 Difference]: With dead ends: 101 [2021-05-02 13:09:00,432 INFO L226 Difference]: Without dead ends: 83 [2021-05-02 13:09:00,433 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 1477.8ms TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 13:09:00,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-02 13:09:00,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2021-05-02 13:09:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 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 13:09:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2021-05-02 13:09:00,437 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 73 [2021-05-02 13:09:00,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:00,437 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2021-05-02 13:09:00,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 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 13:09:00,437 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2021-05-02 13:09:00,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 13:09:00,438 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:00,438 INFO L523 BasicCegarLoop]: trace histogram [28, 26, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:00,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 13:09:00,653 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:00,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:00,653 INFO L82 PathProgramCache]: Analyzing trace with hash -625173617, now seen corresponding path program 25 times [2021-05-02 13:09:00,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:00,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814913176] [2021-05-02 13:09:00,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:00,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-05-02 13:09:00,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:00,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814913176] [2021-05-02 13:09:00,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814913176] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:00,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701851104] [2021-05-02 13:09:00,982 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 13:09:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:01,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 13:09:01,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:01,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-05-02 13:09:01,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701851104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:01,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:01,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2021-05-02 13:09:01,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903391468] [2021-05-02 13:09:01,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 13:09:01,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:01,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 13:09:01,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 13:09:01,175 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 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 13:09:02,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:02,020 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2021-05-02 13:09:02,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 13:09:02,021 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 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 76 [2021-05-02 13:09:02,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:02,021 INFO L225 Difference]: With dead ends: 98 [2021-05-02 13:09:02,021 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 13:09:02,022 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1014.4ms TimeCoverageRelationStatistics Valid=1248, Invalid=2058, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 13:09:02,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 13:09:02,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-02 13:09:02,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 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 13:09:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-05-02 13:09:02,026 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 76 [2021-05-02 13:09:02,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:02,027 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-05-02 13:09:02,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 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 13:09:02,027 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-05-02 13:09:02,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 13:09:02,027 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:02,027 INFO L523 BasicCegarLoop]: trace histogram [29, 27, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:02,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:09:02,241 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:02,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:02,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1881381230, now seen corresponding path program 26 times [2021-05-02 13:09:02,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:02,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941424892] [2021-05-02 13:09:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:02,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-05-02 13:09:02,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:02,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941424892] [2021-05-02 13:09:02,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941424892] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:02,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944337504] [2021-05-02 13:09:02,573 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 13:09:02,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:09:02,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:02,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 13:09:02,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:02,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-05-02 13:09:02,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944337504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:02,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:02,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2021-05-02 13:09:02,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350709007] [2021-05-02 13:09:02,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 13:09:02,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:02,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 13:09:02,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 13:09:02,746 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 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 13:09:03,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:03,637 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-05-02 13:09:03,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 13:09:03,638 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 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 78 [2021-05-02 13:09:03,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:03,638 INFO L225 Difference]: With dead ends: 100 [2021-05-02 13:09:03,638 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 13:09:03,639 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1079.4ms TimeCoverageRelationStatistics Valid=1336, Invalid=2204, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 13:09:03,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 13:09:03,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 13:09:03,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 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 13:09:03,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-05-02 13:09:03,644 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 78 [2021-05-02 13:09:03,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:03,644 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-05-02 13:09:03,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 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 13:09:03,644 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-05-02 13:09:03,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 13:09:03,645 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:03,645 INFO L523 BasicCegarLoop]: trace histogram [30, 28, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:03,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-02 13:09:03,853 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:03,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:03,853 INFO L82 PathProgramCache]: Analyzing trace with hash 2083880149, now seen corresponding path program 27 times [2021-05-02 13:09:03,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:03,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700247398] [2021-05-02 13:09:03,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:04,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 87 proven. 812 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-05-02 13:09:04,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:04,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700247398] [2021-05-02 13:09:04,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700247398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:04,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794279851] [2021-05-02 13:09:04,218 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 13:09:04,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-02 13:09:04,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:04,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 13:09:04,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:04,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 88 proven. 36 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-05-02 13:09:04,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794279851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:04,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:04,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2021-05-02 13:09:04,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86528333] [2021-05-02 13:09:04,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 13:09:04,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:04,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 13:09:04,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1190, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 13:09:04,542 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 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 13:09:06,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:06,009 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2021-05-02 13:09:06,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 13:09:06,010 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 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 80 [2021-05-02 13:09:06,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:06,010 INFO L225 Difference]: With dead ends: 109 [2021-05-02 13:09:06,010 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 13:09:06,012 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 1755.8ms TimeCoverageRelationStatistics Valid=2054, Invalid=4426, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 13:09:06,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 13:09:06,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2021-05-02 13:09:06,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 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 13:09:06,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2021-05-02 13:09:06,017 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 80 [2021-05-02 13:09:06,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:06,017 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2021-05-02 13:09:06,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 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 13:09:06,017 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2021-05-02 13:09:06,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 13:09:06,017 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:06,018 INFO L523 BasicCegarLoop]: trace histogram [31, 29, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:06,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:09:06,228 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:06,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:06,228 INFO L82 PathProgramCache]: Analyzing trace with hash 532545547, now seen corresponding path program 28 times [2021-05-02 13:09:06,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:06,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305401827] [2021-05-02 13:09:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:06,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-02 13:09:06,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:06,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305401827] [2021-05-02 13:09:06,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305401827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:06,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371485639] [2021-05-02 13:09:06,610 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 13:09:06,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:09:06,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:06,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 13:09:06,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:06,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-02 13:09:06,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371485639] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:06,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:06,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2021-05-02 13:09:06,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858100734] [2021-05-02 13:09:06,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 13:09:06,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:06,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 13:09:06,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 13:09:06,806 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 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 13:09:07,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:07,774 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2021-05-02 13:09:07,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 13:09:07,775 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 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 83 [2021-05-02 13:09:07,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:07,775 INFO L225 Difference]: With dead ends: 106 [2021-05-02 13:09:07,775 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 13:09:07,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1194.8ms TimeCoverageRelationStatistics Valid=1521, Invalid=2511, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 13:09:07,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 13:09:07,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-02 13:09:07,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 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 13:09:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2021-05-02 13:09:07,781 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 83 [2021-05-02 13:09:07,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:07,781 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2021-05-02 13:09:07,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 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 13:09:07,786 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2021-05-02 13:09:07,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 13:09:07,787 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:07,787 INFO L523 BasicCegarLoop]: trace histogram [32, 30, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:07,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 13:09:07,998 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:07,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:07,999 INFO L82 PathProgramCache]: Analyzing trace with hash -566360, now seen corresponding path program 29 times [2021-05-02 13:09:07,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:07,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091942546] [2021-05-02 13:09:07,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:08,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-02 13:09:08,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:08,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091942546] [2021-05-02 13:09:08,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091942546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:08,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935259899] [2021-05-02 13:09:08,382 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 13:09:08,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2021-05-02 13:09:08,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:08,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 13:09:08,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:08,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-02 13:09:08,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935259899] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:08,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:08,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2021-05-02 13:09:08,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79370906] [2021-05-02 13:09:08,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 13:09:08,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:08,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 13:09:08,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 13:09:08,582 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 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 13:09:09,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:09,639 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2021-05-02 13:09:09,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 13:09:09,639 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 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 85 [2021-05-02 13:09:09,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:09,640 INFO L225 Difference]: With dead ends: 108 [2021-05-02 13:09:09,640 INFO L226 Difference]: Without dead ends: 88 [2021-05-02 13:09:09,641 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1204.9ms TimeCoverageRelationStatistics Valid=1618, Invalid=2672, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 13:09:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-02 13:09:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-05-02 13:09:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 states have internal predecessors, (87), 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 13:09:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2021-05-02 13:09:09,646 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 85 [2021-05-02 13:09:09,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:09,646 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2021-05-02 13:09:09,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 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 13:09:09,646 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2021-05-02 13:09:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 13:09:09,646 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:09,646 INFO L523 BasicCegarLoop]: trace histogram [33, 31, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:09,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:09:09,857 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:09,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:09,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1220000763, now seen corresponding path program 30 times [2021-05-02 13:09:09,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:09,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434504730] [2021-05-02 13:09:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:10,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 96 proven. 992 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-02 13:09:10,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:10,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434504730] [2021-05-02 13:09:10,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434504730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:10,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647659874] [2021-05-02 13:09:10,260 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 13:09:10,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-05-02 13:09:10,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:10,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 13:09:10,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:10,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:10,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:10,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:10,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:10,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:10,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 155 proven. 4 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2021-05-02 13:09:10,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647659874] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:10,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:10,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 5] total 38 [2021-05-02 13:09:10,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721651753] [2021-05-02 13:09:10,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 13:09:10,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:10,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 13:09:10,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 13:09:10,482 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 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 13:09:11,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:11,694 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2021-05-02 13:09:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 13:09:11,694 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 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 87 [2021-05-02 13:09:11,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:11,695 INFO L225 Difference]: With dead ends: 113 [2021-05-02 13:09:11,695 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 13:09:11,696 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1498.6ms TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 13:09:11,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 13:09:11,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-02 13:09:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 states have internal predecessors, (92), 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 13:09:11,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-05-02 13:09:11,701 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 87 [2021-05-02 13:09:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:11,701 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-05-02 13:09:11,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 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 13:09:11,701 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-05-02 13:09:11,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 13:09:11,701 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:11,701 INFO L523 BasicCegarLoop]: trace histogram [35, 32, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:11,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 13:09:11,909 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:11,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:11,909 INFO L82 PathProgramCache]: Analyzing trace with hash 117417917, now seen corresponding path program 31 times [2021-05-02 13:09:11,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:11,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575151439] [2021-05-02 13:09:11,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:12,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 165 proven. 1056 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-05-02 13:09:12,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:12,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575151439] [2021-05-02 13:09:12,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575151439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:12,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235218131] [2021-05-02 13:09:12,406 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 13:09:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:12,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 13:09:12,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:12,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 165 proven. 1056 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-05-02 13:09:12,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235218131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:12,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:12,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2021-05-02 13:09:12,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271916226] [2021-05-02 13:09:12,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 13:09:12,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:12,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 13:09:12,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 13:09:12,603 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 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 13:09:13,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:13,667 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2021-05-02 13:09:13,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 13:09:13,668 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 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 91 [2021-05-02 13:09:13,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:13,668 INFO L225 Difference]: With dead ends: 116 [2021-05-02 13:09:13,668 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 13:09:13,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1384.3ms TimeCoverageRelationStatistics Valid=1821, Invalid=3009, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 13:09:13,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 13:09:13,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-02 13:09:13,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 states have internal predecessors, (94), 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 13:09:13,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2021-05-02 13:09:13,674 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 91 [2021-05-02 13:09:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:13,675 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2021-05-02 13:09:13,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 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 13:09:13,675 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2021-05-02 13:09:13,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 13:09:13,675 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:13,675 INFO L523 BasicCegarLoop]: trace histogram [36, 33, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:13,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 13:09:13,876 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:13,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:13,876 INFO L82 PathProgramCache]: Analyzing trace with hash -542763430, now seen corresponding path program 32 times [2021-05-02 13:09:13,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:13,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732253209] [2021-05-02 13:09:13,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:14,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 170 proven. 1122 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-05-02 13:09:14,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:14,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732253209] [2021-05-02 13:09:14,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732253209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:14,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054799947] [2021-05-02 13:09:14,357 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 13:09:14,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:09:14,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:14,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 13:09:14,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:14,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 170 proven. 1122 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-05-02 13:09:14,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054799947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:14,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:14,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2021-05-02 13:09:14,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719357867] [2021-05-02 13:09:14,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 13:09:14,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:14,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 13:09:14,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 13:09:14,561 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 37 states have internal predecessors, (83), 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 13:09:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:15,765 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2021-05-02 13:09:15,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 13:09:15,765 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 37 states have internal predecessors, (83), 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 93 [2021-05-02 13:09:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:15,766 INFO L225 Difference]: With dead ends: 118 [2021-05-02 13:09:15,766 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 13:09:15,767 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1457.5ms TimeCoverageRelationStatistics Valid=1927, Invalid=3185, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 13:09:15,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 13:09:15,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-02 13:09:15,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.054945054945055) internal successors, (96), 91 states have internal predecessors, (96), 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 13:09:15,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-05-02 13:09:15,772 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 93 [2021-05-02 13:09:15,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:15,772 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-05-02 13:09:15,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 37 states have internal predecessors, (83), 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 13:09:15,772 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-05-02 13:09:15,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-02 13:09:15,773 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:15,773 INFO L523 BasicCegarLoop]: trace histogram [37, 34, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:15,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 13:09:15,981 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:15,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:15,981 INFO L82 PathProgramCache]: Analyzing trace with hash 678121911, now seen corresponding path program 33 times [2021-05-02 13:09:15,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:15,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26552997] [2021-05-02 13:09:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:16,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1414 backedges. 175 proven. 1190 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-05-02 13:09:16,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:16,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26552997] [2021-05-02 13:09:16,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26552997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:16,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704554269] [2021-05-02 13:09:16,475 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 13:09:16,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-02 13:09:16,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:16,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 13:09:16,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:16,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1414 backedges. 179 proven. 45 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2021-05-02 13:09:16,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704554269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:16,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:16,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 14] total 50 [2021-05-02 13:09:16,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710397471] [2021-05-02 13:09:16,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 13:09:16,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:16,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 13:09:16,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=758, Invalid=1692, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 13:09:16,858 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 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 13:09:18,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:18,992 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2021-05-02 13:09:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 13:09:18,993 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 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 95 [2021-05-02 13:09:18,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:18,993 INFO L225 Difference]: With dead ends: 133 [2021-05-02 13:09:18,993 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 13:09:18,994 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 2382.4ms TimeCoverageRelationStatistics Valid=2898, Invalid=6414, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 13:09:18,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 13:09:18,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2021-05-02 13:09:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.053191489361702) internal successors, (99), 94 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 13:09:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2021-05-02 13:09:19,000 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 95 [2021-05-02 13:09:19,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:19,000 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2021-05-02 13:09:19,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 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 13:09:19,000 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2021-05-02 13:09:19,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 13:09:19,001 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:19,001 INFO L523 BasicCegarLoop]: trace histogram [38, 35, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:19,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 13:09:19,217 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:19,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:19,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1194611727, now seen corresponding path program 34 times [2021-05-02 13:09:19,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:19,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708159055] [2021-05-02 13:09:19,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:19,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 180 proven. 1260 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-05-02 13:09:19,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:19,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708159055] [2021-05-02 13:09:19,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708159055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:19,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461378947] [2021-05-02 13:09:19,790 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 13:09:19,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:09:19,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:19,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 13:09:19,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:19,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 180 proven. 1260 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-05-02 13:09:20,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461378947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:20,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:20,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2021-05-02 13:09:20,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494155317] [2021-05-02 13:09:20,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 13:09:20,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:20,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 13:09:20,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 13:09:20,003 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 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 13:09:21,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:21,345 INFO L93 Difference]: Finished difference Result 124 states and 133 transitions. [2021-05-02 13:09:21,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 13:09:21,345 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 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 98 [2021-05-02 13:09:21,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:21,346 INFO L225 Difference]: With dead ends: 124 [2021-05-02 13:09:21,346 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 13:09:21,347 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1668.1ms TimeCoverageRelationStatistics Valid=2148, Invalid=3552, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 13:09:21,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 13:09:21,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-02 13:09:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 96 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 13:09:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2021-05-02 13:09:21,353 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 98 [2021-05-02 13:09:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:21,353 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2021-05-02 13:09:21,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 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 13:09:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2021-05-02 13:09:21,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 13:09:21,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:21,353 INFO L523 BasicCegarLoop]: trace histogram [39, 36, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:21,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 13:09:21,569 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:21,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:21,569 INFO L82 PathProgramCache]: Analyzing trace with hash -30496046, now seen corresponding path program 35 times [2021-05-02 13:09:21,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:21,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135017648] [2021-05-02 13:09:21,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:22,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 185 proven. 1332 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-05-02 13:09:22,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:22,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135017648] [2021-05-02 13:09:22,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135017648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:22,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170875167] [2021-05-02 13:09:22,070 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 13:09:22,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-05-02 13:09:22,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:22,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 13:09:22,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:22,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 185 proven. 1332 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-05-02 13:09:22,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170875167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:22,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:22,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2021-05-02 13:09:22,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213344448] [2021-05-02 13:09:22,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 13:09:22,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:22,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 13:09:22,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 13:09:22,321 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 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 13:09:23,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:23,667 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2021-05-02 13:09:23,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 13:09:23,668 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 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 100 [2021-05-02 13:09:23,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:23,669 INFO L225 Difference]: With dead ends: 126 [2021-05-02 13:09:23,669 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 13:09:23,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1592.3ms TimeCoverageRelationStatistics Valid=2263, Invalid=3743, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 13:09:23,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 13:09:23,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-02 13:09:23,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0510204081632653) internal successors, (103), 98 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 13:09:23,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2021-05-02 13:09:23,675 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 100 [2021-05-02 13:09:23,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:23,675 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2021-05-02 13:09:23,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 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 13:09:23,675 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2021-05-02 13:09:23,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 13:09:23,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:23,676 INFO L523 BasicCegarLoop]: trace histogram [40, 37, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:23,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 13:09:23,885 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:23,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:23,885 INFO L82 PathProgramCache]: Analyzing trace with hash -538026795, now seen corresponding path program 36 times [2021-05-02 13:09:23,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:23,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562194291] [2021-05-02 13:09:23,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:24,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 190 proven. 1406 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-05-02 13:09:24,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:24,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562194291] [2021-05-02 13:09:24,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562194291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:24,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79529267] [2021-05-02 13:09:24,477 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 13:09:24,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-05-02 13:09:24,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:24,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:09:24,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:24,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 194 proven. 55 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2021-05-02 13:09:24,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79529267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:24,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:24,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 15] total 54 [2021-05-02 13:09:24,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416817276] [2021-05-02 13:09:24,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 13:09:24,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:24,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 13:09:24,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=886, Invalid=1976, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 13:09:24,888 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 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 13:09:27,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:27,203 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2021-05-02 13:09:27,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 13:09:27,204 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 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 102 [2021-05-02 13:09:27,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:27,204 INFO L225 Difference]: With dead ends: 141 [2021-05-02 13:09:27,204 INFO L226 Difference]: Without dead ends: 118 [2021-05-02 13:09:27,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 2698.1ms TimeCoverageRelationStatistics Valid=3412, Invalid=7508, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 13:09:27,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-02 13:09:27,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2021-05-02 13:09:27,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 101 states have internal predecessors, (106), 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 13:09:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2021-05-02 13:09:27,211 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 102 [2021-05-02 13:09:27,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:27,212 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2021-05-02 13:09:27,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 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 13:09:27,212 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2021-05-02 13:09:27,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 13:09:27,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:27,212 INFO L523 BasicCegarLoop]: trace histogram [41, 38, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:27,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-02 13:09:27,429 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:27,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:27,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1027085237, now seen corresponding path program 37 times [2021-05-02 13:09:27,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:27,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922297090] [2021-05-02 13:09:27,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:28,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 195 proven. 1482 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 13:09:28,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:28,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922297090] [2021-05-02 13:09:28,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922297090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:28,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192967391] [2021-05-02 13:09:28,028 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 13:09:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:28,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 13:09:28,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:28,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 195 proven. 1482 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 13:09:28,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192967391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:28,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:28,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2021-05-02 13:09:28,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470625572] [2021-05-02 13:09:28,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 13:09:28,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:28,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 13:09:28,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 13:09:28,256 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 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 13:09:29,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:29,711 INFO L93 Difference]: Finished difference Result 132 states and 141 transitions. [2021-05-02 13:09:29,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 13:09:29,712 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 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 13:09:29,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:29,712 INFO L225 Difference]: With dead ends: 132 [2021-05-02 13:09:29,713 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 13:09:29,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1817.3ms TimeCoverageRelationStatistics Valid=2502, Invalid=4140, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 13:09:29,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 13:09:29,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-05-02 13:09:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 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 13:09:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-05-02 13:09:29,720 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 105 [2021-05-02 13:09:29,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:29,720 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-05-02 13:09:29,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 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 13:09:29,721 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-05-02 13:09:29,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 13:09:29,721 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:29,721 INFO L523 BasicCegarLoop]: trace histogram [42, 39, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:29,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:09:29,937 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:29,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:29,937 INFO L82 PathProgramCache]: Analyzing trace with hash -467270616, now seen corresponding path program 38 times [2021-05-02 13:09:29,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:29,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497901099] [2021-05-02 13:09:29,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:30,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:30,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 200 proven. 1560 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 13:09:30,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:30,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497901099] [2021-05-02 13:09:30,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497901099] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:30,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526764256] [2021-05-02 13:09:30,539 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 13:09:30,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:09:30,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:30,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 13:09:30,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:30,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 200 proven. 1560 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 13:09:30,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526764256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:30,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:30,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2021-05-02 13:09:30,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573043176] [2021-05-02 13:09:30,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 13:09:30,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:30,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 13:09:30,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 13:09:30,782 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 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 13:09:32,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:32,305 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2021-05-02 13:09:32,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 13:09:32,305 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 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 13:09:32,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:32,306 INFO L225 Difference]: With dead ends: 134 [2021-05-02 13:09:32,306 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 13:09:32,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1861.1ms TimeCoverageRelationStatistics Valid=2626, Invalid=4346, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 13:09:32,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 13:09:32,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-05-02 13:09:32,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 105 states have internal predecessors, (110), 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 13:09:32,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-05-02 13:09:32,313 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 107 [2021-05-02 13:09:32,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:32,314 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-05-02 13:09:32,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 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 13:09:32,314 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-05-02 13:09:32,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-02 13:09:32,314 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:32,314 INFO L523 BasicCegarLoop]: trace histogram [43, 40, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:32,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:09:32,531 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:32,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:32,532 INFO L82 PathProgramCache]: Analyzing trace with hash 643668165, now seen corresponding path program 39 times [2021-05-02 13:09:32,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:32,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406366777] [2021-05-02 13:09:32,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:33,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1915 backedges. 205 proven. 1640 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 13:09:33,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:33,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406366777] [2021-05-02 13:09:33,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406366777] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:33,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442147207] [2021-05-02 13:09:33,216 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 13:09:33,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 13:09:33,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:33,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 13:09:33,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:33,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1915 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-05-02 13:09:33,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442147207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:33,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:33,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 16] total 58 [2021-05-02 13:09:33,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378564760] [2021-05-02 13:09:33,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 13:09:33,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:33,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 13:09:33,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1024, Invalid=2282, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 13:09:33,718 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 57 states have internal predecessors, (115), 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 13:09:36,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:36,369 INFO L93 Difference]: Finished difference Result 149 states and 165 transitions. [2021-05-02 13:09:36,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 13:09:36,371 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 57 states have internal predecessors, (115), 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 109 [2021-05-02 13:09:36,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:36,372 INFO L225 Difference]: With dead ends: 149 [2021-05-02 13:09:36,372 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 13:09:36,373 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 3121.2ms TimeCoverageRelationStatistics Valid=3968, Invalid=8688, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 13:09:36,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 13:09:36,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2021-05-02 13:09:36,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0462962962962963) internal successors, (113), 108 states have internal predecessors, (113), 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 13:09:36,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2021-05-02 13:09:36,380 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 109 [2021-05-02 13:09:36,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:36,380 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2021-05-02 13:09:36,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 57 states have internal predecessors, (115), 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 13:09:36,380 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2021-05-02 13:09:36,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 13:09:36,381 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:36,381 INFO L523 BasicCegarLoop]: trace histogram [44, 41, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:36,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:09:36,589 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:36,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:36,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1768623489, now seen corresponding path program 40 times [2021-05-02 13:09:36,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:36,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575993420] [2021-05-02 13:09:36,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:37,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2014 backedges. 210 proven. 1722 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 13:09:37,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:37,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575993420] [2021-05-02 13:09:37,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575993420] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:37,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154949358] [2021-05-02 13:09:37,313 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 13:09:37,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:09:37,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:37,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 13:09:37,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:37,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2014 backedges. 210 proven. 1722 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 13:09:37,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154949358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:37,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:37,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-05-02 13:09:37,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427818412] [2021-05-02 13:09:37,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 13:09:37,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:37,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 13:09:37,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 13:09:37,621 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 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 13:09:39,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:39,348 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2021-05-02 13:09:39,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 13:09:39,349 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 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 112 [2021-05-02 13:09:39,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:39,349 INFO L225 Difference]: With dead ends: 140 [2021-05-02 13:09:39,349 INFO L226 Difference]: Without dead ends: 115 [2021-05-02 13:09:39,350 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 2159.6ms TimeCoverageRelationStatistics Valid=2883, Invalid=4773, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 13:09:39,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-02 13:09:39,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-05-02 13:09:39,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0454545454545454) internal successors, (115), 110 states have internal predecessors, (115), 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 13:09:39,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2021-05-02 13:09:39,359 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 112 [2021-05-02 13:09:39,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:39,359 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2021-05-02 13:09:39,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 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 13:09:39,359 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2021-05-02 13:09:39,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 13:09:39,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:39,360 INFO L523 BasicCegarLoop]: trace histogram [45, 42, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:39,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-02 13:09:39,573 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:39,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:39,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1967598844, now seen corresponding path program 41 times [2021-05-02 13:09:39,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:39,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092465732] [2021-05-02 13:09:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:40,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 215 proven. 1806 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 13:09:40,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:40,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092465732] [2021-05-02 13:09:40,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092465732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:40,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142353622] [2021-05-02 13:09:40,344 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 13:09:40,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-05-02 13:09:40,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:40,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 13:09:40,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:40,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 215 proven. 1806 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 13:09:40,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142353622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:40,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:40,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2021-05-02 13:09:40,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054668092] [2021-05-02 13:09:40,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 13:09:40,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:40,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 13:09:40,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 13:09:40,621 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 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 13:09:42,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:42,413 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2021-05-02 13:09:42,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 13:09:42,413 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 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 114 [2021-05-02 13:09:42,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:42,414 INFO L225 Difference]: With dead ends: 142 [2021-05-02 13:09:42,414 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 13:09:42,415 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 2254.9ms TimeCoverageRelationStatistics Valid=3016, Invalid=4994, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 13:09:42,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 13:09:42,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-05-02 13:09:42,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0446428571428572) internal successors, (117), 112 states have internal predecessors, (117), 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 13:09:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2021-05-02 13:09:42,423 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 114 [2021-05-02 13:09:42,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:42,423 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2021-05-02 13:09:42,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 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 13:09:42,423 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2021-05-02 13:09:42,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 13:09:42,423 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:42,423 INFO L523 BasicCegarLoop]: trace histogram [46, 43, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:42,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:09:42,625 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:42,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:42,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1884601401, now seen corresponding path program 42 times [2021-05-02 13:09:42,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:42,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598793877] [2021-05-02 13:09:42,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:43,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2194 backedges. 220 proven. 1892 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 13:09:43,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:43,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598793877] [2021-05-02 13:09:43,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598793877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:43,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463249637] [2021-05-02 13:09:43,325 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 13:09:43,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 13:09:43,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:43,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:09:43,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:43,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2194 backedges. 224 proven. 78 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2021-05-02 13:09:43,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463249637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:43,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:43,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 17] total 62 [2021-05-02 13:09:43,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225450392] [2021-05-02 13:09:43,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 13:09:43,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:43,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 13:09:43,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1172, Invalid=2610, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 13:09:43,856 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 62 states, 62 states have (on average 1.967741935483871) internal successors, (122), 61 states have internal predecessors, (122), 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 13:09:46,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:46,814 INFO L93 Difference]: Finished difference Result 157 states and 173 transitions. [2021-05-02 13:09:46,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 13:09:46,815 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.967741935483871) internal successors, (122), 61 states have internal predecessors, (122), 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 116 [2021-05-02 13:09:46,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:46,815 INFO L225 Difference]: With dead ends: 157 [2021-05-02 13:09:46,815 INFO L226 Difference]: Without dead ends: 132 [2021-05-02 13:09:46,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2616 ImplicationChecksByTransitivity, 3471.7ms TimeCoverageRelationStatistics Valid=4566, Invalid=9954, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 13:09:46,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-02 13:09:46,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 120. [2021-05-02 13:09:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 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 13:09:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2021-05-02 13:09:46,824 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 116 [2021-05-02 13:09:46,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:46,824 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2021-05-02 13:09:46,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 1.967741935483871) internal successors, (122), 61 states have internal predecessors, (122), 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 13:09:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2021-05-02 13:09:46,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-05-02 13:09:46,825 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:46,825 INFO L523 BasicCegarLoop]: trace histogram [47, 44, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:47,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:09:47,043 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:47,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:47,043 INFO L82 PathProgramCache]: Analyzing trace with hash 418098393, now seen corresponding path program 43 times [2021-05-02 13:09:47,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:47,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638807364] [2021-05-02 13:09:47,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:47,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:47,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 225 proven. 1980 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-02 13:09:47,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:47,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638807364] [2021-05-02 13:09:47,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638807364] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:47,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094473797] [2021-05-02 13:09:47,866 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 13:09:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:47,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 13:09:47,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:47,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:47,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 225 proven. 1980 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-02 13:09:48,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094473797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:48,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:48,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-05-02 13:09:48,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859703152] [2021-05-02 13:09:48,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 13:09:48,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:48,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 13:09:48,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 13:09:48,137 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 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 13:09:49,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:50,000 INFO L93 Difference]: Finished difference Result 148 states and 157 transitions. [2021-05-02 13:09:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 13:09:50,000 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 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 119 [2021-05-02 13:09:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:50,001 INFO L225 Difference]: With dead ends: 148 [2021-05-02 13:09:50,001 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 13:09:50,002 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 2442.1ms TimeCoverageRelationStatistics Valid=3291, Invalid=5451, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 13:09:50,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 13:09:50,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-05-02 13:09:50,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 117 states have internal predecessors, (122), 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 13:09:50,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2021-05-02 13:09:50,010 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 119 [2021-05-02 13:09:50,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:50,011 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2021-05-02 13:09:50,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 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 13:09:50,011 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2021-05-02 13:09:50,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-02 13:09:50,011 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:50,011 INFO L523 BasicCegarLoop]: trace histogram [48, 45, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:50,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 13:09:50,229 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:50,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:50,230 INFO L82 PathProgramCache]: Analyzing trace with hash -960479754, now seen corresponding path program 44 times [2021-05-02 13:09:50,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:50,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785116962] [2021-05-02 13:09:50,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:51,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 230 proven. 2070 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-02 13:09:51,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:51,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785116962] [2021-05-02 13:09:51,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785116962] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:51,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562299372] [2021-05-02 13:09:51,072 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 13:09:51,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:09:51,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:51,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 13:09:51,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:51,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 230 proven. 2070 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-02 13:09:51,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562299372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:51,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:51,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2021-05-02 13:09:51,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834537879] [2021-05-02 13:09:51,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 13:09:51,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:51,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 13:09:51,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 13:09:51,350 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 50 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 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 13:09:53,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:53,190 INFO L93 Difference]: Finished difference Result 150 states and 159 transitions. [2021-05-02 13:09:53,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 13:09:53,191 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 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 121 [2021-05-02 13:09:53,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:53,192 INFO L225 Difference]: With dead ends: 150 [2021-05-02 13:09:53,192 INFO L226 Difference]: Without dead ends: 124 [2021-05-02 13:09:53,193 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 2472.9ms TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 13:09:53,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-02 13:09:53,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-05-02 13:09:53,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0420168067226891) internal successors, (124), 119 states have internal predecessors, (124), 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 13:09:53,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2021-05-02 13:09:53,201 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 121 [2021-05-02 13:09:53,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:53,201 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2021-05-02 13:09:53,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 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 13:09:53,201 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2021-05-02 13:09:53,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-02 13:09:53,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:53,201 INFO L523 BasicCegarLoop]: trace histogram [49, 46, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:53,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 13:09:53,404 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:53,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:53,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1370815443, now seen corresponding path program 45 times [2021-05-02 13:09:53,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:53,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687395884] [2021-05-02 13:09:53,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:54,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 235 proven. 2162 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-02 13:09:54,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:54,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687395884] [2021-05-02 13:09:54,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687395884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:54,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892071312] [2021-05-02 13:09:54,294 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 13:09:54,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-02 13:09:54,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:54,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 13:09:54,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:54,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:54,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:54,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:54,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:54,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:54,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:54,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:54,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 322 proven. 9 refuted. 0 times theorem prover too weak. 2161 trivial. 0 not checked. [2021-05-02 13:09:54,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892071312] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:54,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:54,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 6] total 54 [2021-05-02 13:09:54,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010808733] [2021-05-02 13:09:54,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 13:09:54,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:54,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 13:09:54,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 13:09:54,622 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 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 13:09:56,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:56,783 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2021-05-02 13:09:56,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 13:09:56,784 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 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 123 [2021-05-02 13:09:56,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:56,785 INFO L225 Difference]: With dead ends: 155 [2021-05-02 13:09:56,785 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 13:09:56,786 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 2922.1ms TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 13:09:56,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 13:09:56,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2021-05-02 13:09:56,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.048780487804878) internal successors, (129), 123 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 13:09:56,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2021-05-02 13:09:56,794 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 123 [2021-05-02 13:09:56,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:56,794 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2021-05-02 13:09:56,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 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 13:09:56,794 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2021-05-02 13:09:56,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-02 13:09:56,794 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:56,794 INFO L523 BasicCegarLoop]: trace histogram [51, 47, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:57,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-02 13:09:57,001 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:57,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:57,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1520231435, now seen corresponding path program 46 times [2021-05-02 13:09:57,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:57,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114363079] [2021-05-02 13:09:57,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:57,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2692 backedges. 336 proven. 2256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-02 13:09:57,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:57,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114363079] [2021-05-02 13:09:57,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114363079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:57,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182170954] [2021-05-02 13:09:57,922 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 13:09:57,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:09:57,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:57,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 13:09:57,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:58,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2692 backedges. 336 proven. 2256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-02 13:09:58,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182170954] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:58,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:58,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2021-05-02 13:09:58,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168466842] [2021-05-02 13:09:58,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 13:09:58,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:58,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 13:09:58,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 13:09:58,185 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 51 states have internal predecessors, (111), 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 13:10:00,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:00,217 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2021-05-02 13:10:00,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 13:10:00,217 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 51 states have internal predecessors, (111), 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 127 [2021-05-02 13:10:00,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:00,218 INFO L225 Difference]: With dead ends: 158 [2021-05-02 13:10:00,218 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 13:10:00,219 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 2615.4ms TimeCoverageRelationStatistics Valid=3726, Invalid=6174, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 13:10:00,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 13:10:00,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-05-02 13:10:00,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.048) internal successors, (131), 125 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 13:10:00,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 135 transitions. [2021-05-02 13:10:00,227 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 135 transitions. Word has length 127 [2021-05-02 13:10:00,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:00,228 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 135 transitions. [2021-05-02 13:10:00,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 51 states have internal predecessors, (111), 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 13:10:00,228 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 135 transitions. [2021-05-02 13:10:00,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 13:10:00,229 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:00,229 INFO L523 BasicCegarLoop]: trace histogram [52, 48, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:00,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:10:00,435 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:00,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:00,435 INFO L82 PathProgramCache]: Analyzing trace with hash -2096035800, now seen corresponding path program 47 times [2021-05-02 13:10:00,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:00,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139149921] [2021-05-02 13:10:00,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:01,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 343 proven. 2352 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-02 13:10:01,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:01,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139149921] [2021-05-02 13:10:01,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139149921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:01,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142332679] [2021-05-02 13:10:01,445 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 13:10:01,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 53 check-sat command(s) [2021-05-02 13:10:01,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:10:01,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 13:10:01,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:01,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 343 proven. 2352 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-02 13:10:01,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142332679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:01,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:01,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2021-05-02 13:10:01,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486584802] [2021-05-02 13:10:01,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 13:10:01,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:01,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 13:10:01,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 13:10:01,789 INFO L87 Difference]: Start difference. First operand 130 states and 135 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 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 13:10:04,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:04,059 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2021-05-02 13:10:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 13:10:04,059 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 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 13:10:04,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:04,060 INFO L225 Difference]: With dead ends: 160 [2021-05-02 13:10:04,060 INFO L226 Difference]: Without dead ends: 132 [2021-05-02 13:10:04,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 2903.9ms TimeCoverageRelationStatistics Valid=3877, Invalid=6425, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 13:10:04,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-02 13:10:04,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2021-05-02 13:10:04,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.047244094488189) internal successors, (133), 127 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 13:10:04,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2021-05-02 13:10:04,070 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 129 [2021-05-02 13:10:04,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:04,070 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2021-05-02 13:10:04,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 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 13:10:04,070 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2021-05-02 13:10:04,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-02 13:10:04,071 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:04,071 INFO L523 BasicCegarLoop]: trace histogram [53, 49, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:04,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:10:04,285 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:04,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:04,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1594661125, now seen corresponding path program 48 times [2021-05-02 13:10:04,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:04,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971703283] [2021-05-02 13:10:04,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:05,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 350 proven. 2450 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-02 13:10:05,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:05,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971703283] [2021-05-02 13:10:05,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971703283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:05,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638731802] [2021-05-02 13:10:05,354 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 13:10:05,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-05-02 13:10:05,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:10:05,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:10:05,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:05,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 359 proven. 91 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2021-05-02 13:10:06,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638731802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:06,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:06,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 18] total 69 [2021-05-02 13:10:06,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115882158] [2021-05-02 13:10:06,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-02 13:10:06,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:06,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-02 13:10:06,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1480, Invalid=3212, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 13:10:06,116 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 68 states have internal predecessors, (137), 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 13:10:10,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:10,125 INFO L93 Difference]: Finished difference Result 183 states and 205 transitions. [2021-05-02 13:10:10,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 13:10:10,126 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 68 states have internal predecessors, (137), 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 13:10:10,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:10,127 INFO L225 Difference]: With dead ends: 183 [2021-05-02 13:10:10,127 INFO L226 Difference]: Without dead ends: 155 [2021-05-02 13:10:10,128 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3300 ImplicationChecksByTransitivity, 4925.1ms TimeCoverageRelationStatistics Valid=5634, Invalid=12456, Unknown=0, NotChecked=0, Total=18090 [2021-05-02 13:10:10,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-02 13:10:10,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 135. [2021-05-02 13:10:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0461538461538462) internal successors, (136), 130 states have internal predecessors, (136), 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 13:10:10,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2021-05-02 13:10:10,137 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 131 [2021-05-02 13:10:10,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:10,137 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2021-05-02 13:10:10,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 68 states have internal predecessors, (137), 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 13:10:10,137 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2021-05-02 13:10:10,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-02 13:10:10,138 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:10,138 INFO L523 BasicCegarLoop]: trace histogram [54, 50, 14, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:10,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-02 13:10:10,355 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:10,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:10,355 INFO L82 PathProgramCache]: Analyzing trace with hash 614707457, now seen corresponding path program 49 times [2021-05-02 13:10:10,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:10,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275687274] [2021-05-02 13:10:10,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:11,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3021 backedges. 357 proven. 2550 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-05-02 13:10:11,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:11,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275687274] [2021-05-02 13:10:11,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275687274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:11,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955234010] [2021-05-02 13:10:11,435 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 13:10:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:11,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 13:10:11,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:11,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3021 backedges. 357 proven. 2550 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-05-02 13:10:11,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955234010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:11,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:11,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2021-05-02 13:10:11,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867634009] [2021-05-02 13:10:11,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 13:10:11,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:11,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 13:10:11,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 13:10:11,721 INFO L87 Difference]: Start difference. First operand 135 states and 140 transitions. Second operand has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 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 13:10:14,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:14,107 INFO L93 Difference]: Finished difference Result 166 states and 177 transitions. [2021-05-02 13:10:14,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 13:10:14,108 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 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 134 [2021-05-02 13:10:14,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:14,108 INFO L225 Difference]: With dead ends: 166 [2021-05-02 13:10:14,108 INFO L226 Difference]: Without dead ends: 137 [2021-05-02 13:10:14,109 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 3088.9ms TimeCoverageRelationStatistics Valid=4188, Invalid=6942, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 13:10:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-02 13:10:14,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-02 13:10:14,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0454545454545454) internal successors, (138), 132 states have internal predecessors, (138), 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 13:10:14,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 142 transitions. [2021-05-02 13:10:14,118 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 142 transitions. Word has length 134 [2021-05-02 13:10:14,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:14,119 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 142 transitions. [2021-05-02 13:10:14,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 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 13:10:14,119 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 142 transitions. [2021-05-02 13:10:14,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-02 13:10:14,119 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:14,119 INFO L523 BasicCegarLoop]: trace histogram [55, 51, 14, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:14,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:10:14,320 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:14,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:14,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1065278908, now seen corresponding path program 50 times [2021-05-02 13:10:14,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:14,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626915206] [2021-05-02 13:10:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:15,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3130 backedges. 364 proven. 2652 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-05-02 13:10:15,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:15,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626915206] [2021-05-02 13:10:15,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626915206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:15,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903926180] [2021-05-02 13:10:15,560 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 13:10:15,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:10:15,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:10:15,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 13:10:15,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:15,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3130 backedges. 364 proven. 2652 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-05-02 13:10:15,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903926180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:15,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:15,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 56 [2021-05-02 13:10:15,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641691327] [2021-05-02 13:10:15,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 13:10:15,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:15,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 13:10:15,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 13:10:15,878 INFO L87 Difference]: Start difference. First operand 137 states and 142 transitions. Second operand has 56 states, 56 states have (on average 2.125) internal successors, (119), 55 states have internal predecessors, (119), 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 13:10:18,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:18,215 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2021-05-02 13:10:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 13:10:18,216 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.125) internal successors, (119), 55 states have internal predecessors, (119), 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 136 [2021-05-02 13:10:18,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:18,216 INFO L225 Difference]: With dead ends: 168 [2021-05-02 13:10:18,216 INFO L226 Difference]: Without dead ends: 139 [2021-05-02 13:10:18,217 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 3282.1ms TimeCoverageRelationStatistics Valid=4348, Invalid=7208, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 13:10:18,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-02 13:10:18,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-05-02 13:10:18,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.044776119402985) internal successors, (140), 134 states have internal predecessors, (140), 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 13:10:18,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-05-02 13:10:18,227 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 136 [2021-05-02 13:10:18,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:18,227 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-05-02 13:10:18,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.125) internal successors, (119), 55 states have internal predecessors, (119), 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 13:10:18,227 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-05-02 13:10:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 13:10:18,228 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:18,228 INFO L523 BasicCegarLoop]: trace histogram [56, 52, 14, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:18,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-02 13:10:18,432 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:18,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:18,432 INFO L82 PathProgramCache]: Analyzing trace with hash -624472377, now seen corresponding path program 51 times [2021-05-02 13:10:18,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:18,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699925589] [2021-05-02 13:10:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:19,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3241 backedges. 371 proven. 2756 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-05-02 13:10:19,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:19,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699925589] [2021-05-02 13:10:19,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699925589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:19,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658429839] [2021-05-02 13:10:19,547 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 [2021-05-02 13:10:19,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-02 13:10:19,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:10:19,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 13:10:19,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:19,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:19,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:20,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:20,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:20,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:20,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:20,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:20,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:20,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:20,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:20,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:20,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:20,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:20,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:20,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:20,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3241 backedges. 380 proven. 105 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2021-05-02 13:10:20,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658429839] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:20,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:20,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 19] total 73 [2021-05-02 13:10:20,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34724564] [2021-05-02 13:10:20,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 13:10:20,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:20,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 13:10:20,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=3599, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 13:10:20,228 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand has 73 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 72 states have internal predecessors, (144), 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 13:10:24,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:24,081 INFO L93 Difference]: Finished difference Result 191 states and 213 transitions. [2021-05-02 13:10:24,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 13:10:24,081 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 72 states have internal predecessors, (144), 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 138 [2021-05-02 13:10:24,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:24,082 INFO L225 Difference]: With dead ends: 191 [2021-05-02 13:10:24,082 INFO L226 Difference]: Without dead ends: 162 [2021-05-02 13:10:24,083 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3698 ImplicationChecksByTransitivity, 4972.2ms TimeCoverageRelationStatistics Valid=6343, Invalid=13963, Unknown=0, NotChecked=0, Total=20306 [2021-05-02 13:10:24,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-02 13:10:24,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 142. [2021-05-02 13:10:24,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0437956204379562) internal successors, (143), 137 states have internal predecessors, (143), 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 13:10:24,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 147 transitions. [2021-05-02 13:10:24,093 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 147 transitions. Word has length 138 [2021-05-02 13:10:24,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:24,093 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 147 transitions. [2021-05-02 13:10:24,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 72 states have internal predecessors, (144), 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 13:10:24,094 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 147 transitions. [2021-05-02 13:10:24,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-05-02 13:10:24,094 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:24,094 INFO L523 BasicCegarLoop]: trace histogram [57, 53, 15, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:24,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-02 13:10:24,295 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:24,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:24,296 INFO L82 PathProgramCache]: Analyzing trace with hash 209104409, now seen corresponding path program 52 times [2021-05-02 13:10:24,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:24,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298822910] [2021-05-02 13:10:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:25,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3369 backedges. 378 proven. 2862 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-05-02 13:10:25,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:25,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298822910] [2021-05-02 13:10:25,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298822910] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:25,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525129740] [2021-05-02 13:10:25,679 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:10:25,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:10:25,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:10:25,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 13:10:25,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:25,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:25,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3369 backedges. 378 proven. 2862 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-05-02 13:10:26,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525129740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:26,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:26,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 58 [2021-05-02 13:10:26,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146452468] [2021-05-02 13:10:26,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 13:10:26,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:26,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 13:10:26,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 13:10:26,072 INFO L87 Difference]: Start difference. First operand 142 states and 147 transitions. Second operand has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 57 states have internal predecessors, (123), 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 13:10:28,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:28,870 INFO L93 Difference]: Finished difference Result 174 states and 185 transitions. [2021-05-02 13:10:28,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 13:10:28,871 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 57 states have internal predecessors, (123), 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 141 [2021-05-02 13:10:28,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:28,872 INFO L225 Difference]: With dead ends: 174 [2021-05-02 13:10:28,872 INFO L226 Difference]: Without dead ends: 144 [2021-05-02 13:10:28,873 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 3742.6ms TimeCoverageRelationStatistics Valid=4677, Invalid=7755, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 13:10:28,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-02 13:10:28,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-05-02 13:10:28,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0431654676258992) internal successors, (145), 139 states have internal predecessors, (145), 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 13:10:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2021-05-02 13:10:28,883 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 141 [2021-05-02 13:10:28,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:28,883 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2021-05-02 13:10:28,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 57 states have internal predecessors, (123), 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 13:10:28,883 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2021-05-02 13:10:28,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 13:10:28,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:28,884 INFO L523 BasicCegarLoop]: trace histogram [58, 54, 15, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:29,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-02 13:10:29,102 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:29,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:29,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1656150902, now seen corresponding path program 53 times [2021-05-02 13:10:29,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:29,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151727266] [2021-05-02 13:10:29,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:30,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 385 proven. 2970 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-05-02 13:10:30,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:30,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151727266] [2021-05-02 13:10:30,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151727266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:30,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860274462] [2021-05-02 13:10:30,343 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:10:30,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 59 check-sat command(s) [2021-05-02 13:10:30,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:10:30,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-02 13:10:30,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:30,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 385 proven. 2970 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-05-02 13:10:30,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860274462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:30,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:30,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 59 [2021-05-02 13:10:30,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118965546] [2021-05-02 13:10:30,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 13:10:30,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:30,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 13:10:30,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 13:10:30,686 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 58 states have internal predecessors, (125), 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 13:10:33,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:33,359 INFO L93 Difference]: Finished difference Result 176 states and 187 transitions. [2021-05-02 13:10:33,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 13:10:33,361 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 58 states have internal predecessors, (125), 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 143 [2021-05-02 13:10:33,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:33,361 INFO L225 Difference]: With dead ends: 176 [2021-05-02 13:10:33,362 INFO L226 Difference]: Without dead ends: 146 [2021-05-02 13:10:33,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 3508.6ms TimeCoverageRelationStatistics Valid=4846, Invalid=8036, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 13:10:33,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-02 13:10:33,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-05-02 13:10:33,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0425531914893618) internal successors, (147), 141 states have internal predecessors, (147), 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 13:10:33,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 151 transitions. [2021-05-02 13:10:33,374 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 151 transitions. Word has length 143 [2021-05-02 13:10:33,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:33,374 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 151 transitions. [2021-05-02 13:10:33,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 58 states have internal predecessors, (125), 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 13:10:33,375 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 151 transitions. [2021-05-02 13:10:33,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-02 13:10:33,375 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:33,375 INFO L523 BasicCegarLoop]: trace histogram [59, 55, 15, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:33,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-02 13:10:33,585 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:33,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:33,585 INFO L82 PathProgramCache]: Analyzing trace with hash 698426771, now seen corresponding path program 54 times [2021-05-02 13:10:33,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:33,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136464616] [2021-05-02 13:10:33,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:34,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 392 proven. 3080 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-05-02 13:10:34,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:34,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136464616] [2021-05-02 13:10:34,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136464616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:34,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192220038] [2021-05-02 13:10:34,867 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:10:34,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-05-02 13:10:34,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:10:34,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:10:34,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:35,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 401 proven. 120 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2021-05-02 13:10:35,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192220038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:35,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:35,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 20] total 77 [2021-05-02 13:10:35,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363570614] [2021-05-02 13:10:35,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-02 13:10:35,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:35,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-02 13:10:35,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1844, Invalid=4008, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 13:10:35,643 INFO L87 Difference]: Start difference. First operand 146 states and 151 transitions. Second operand has 77 states, 77 states have (on average 1.9610389610389611) internal successors, (151), 76 states have internal predecessors, (151), 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 13:10:39,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:39,970 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2021-05-02 13:10:39,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-02 13:10:39,971 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.9610389610389611) internal successors, (151), 76 states have internal predecessors, (151), 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 145 [2021-05-02 13:10:39,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:39,972 INFO L225 Difference]: With dead ends: 199 [2021-05-02 13:10:39,972 INFO L226 Difference]: Without dead ends: 169 [2021-05-02 13:10:39,973 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4118 ImplicationChecksByTransitivity, 5577.2ms TimeCoverageRelationStatistics Valid=7094, Invalid=15556, Unknown=0, NotChecked=0, Total=22650 [2021-05-02 13:10:39,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-02 13:10:39,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 149. [2021-05-02 13:10:39,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0416666666666667) internal successors, (150), 144 states have internal predecessors, (150), 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 13:10:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2021-05-02 13:10:39,983 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 145 [2021-05-02 13:10:39,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:39,983 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2021-05-02 13:10:39,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 1.9610389610389611) internal successors, (151), 76 states have internal predecessors, (151), 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 13:10:39,983 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2021-05-02 13:10:39,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-02 13:10:39,984 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:39,984 INFO L523 BasicCegarLoop]: trace histogram [60, 56, 16, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:40,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:10:40,189 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:40,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:40,189 INFO L82 PathProgramCache]: Analyzing trace with hash 120091891, now seen corresponding path program 55 times [2021-05-02 13:10:40,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:40,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050371395] [2021-05-02 13:10:40,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:41,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3736 backedges. 399 proven. 3192 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 13:10:41,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:41,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050371395] [2021-05-02 13:10:41,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050371395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:41,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115640359] [2021-05-02 13:10:41,728 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:10:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:41,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 13:10:41,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:41,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:41,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:42,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:42,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:42,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:42,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:42,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:42,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:42,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:42,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:42,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:42,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:42,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:42,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:42,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:42,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:42,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:42,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3736 backedges. 399 proven. 3192 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 13:10:42,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115640359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:42,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:42,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59] total 61 [2021-05-02 13:10:42,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771313260] [2021-05-02 13:10:42,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 13:10:42,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:42,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 13:10:42,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 13:10:42,055 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 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 13:10:44,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:44,761 INFO L93 Difference]: Finished difference Result 182 states and 193 transitions. [2021-05-02 13:10:44,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 13:10:44,762 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 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 148 [2021-05-02 13:10:44,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:44,763 INFO L225 Difference]: With dead ends: 182 [2021-05-02 13:10:44,763 INFO L226 Difference]: Without dead ends: 151 [2021-05-02 13:10:44,764 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 3885.0ms TimeCoverageRelationStatistics Valid=5193, Invalid=8613, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 13:10:44,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-02 13:10:44,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-05-02 13:10:44,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0410958904109588) internal successors, (152), 146 states have internal predecessors, (152), 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 13:10:44,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 156 transitions. [2021-05-02 13:10:44,774 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 156 transitions. Word has length 148 [2021-05-02 13:10:44,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:44,774 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 156 transitions. [2021-05-02 13:10:44,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 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 13:10:44,775 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 156 transitions. [2021-05-02 13:10:44,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-02 13:10:44,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:44,775 INFO L523 BasicCegarLoop]: trace histogram [61, 57, 16, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:44,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-02 13:10:44,976 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:44,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:44,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2056844534, now seen corresponding path program 56 times [2021-05-02 13:10:44,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:44,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96801745] [2021-05-02 13:10:44,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:46,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 406 proven. 3306 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 13:10:46,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:46,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96801745] [2021-05-02 13:10:46,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96801745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:46,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926936179] [2021-05-02 13:10:46,416 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:10:46,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:10:46,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:10:46,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-02 13:10:46,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:46,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 406 proven. 3306 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 13:10:46,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926936179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:46,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:46,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60] total 62 [2021-05-02 13:10:46,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082943324] [2021-05-02 13:10:46,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 13:10:46,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:46,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 13:10:46,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 13:10:46,758 INFO L87 Difference]: Start difference. First operand 151 states and 156 transitions. Second operand has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 61 states have internal predecessors, (131), 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 13:10:49,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:49,598 INFO L93 Difference]: Finished difference Result 184 states and 195 transitions. [2021-05-02 13:10:49,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 13:10:49,598 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 61 states have internal predecessors, (131), 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 150 [2021-05-02 13:10:49,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:49,599 INFO L225 Difference]: With dead ends: 184 [2021-05-02 13:10:49,599 INFO L226 Difference]: Without dead ends: 153 [2021-05-02 13:10:49,600 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1878 ImplicationChecksByTransitivity, 3840.0ms TimeCoverageRelationStatistics Valid=5371, Invalid=8909, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 13:10:49,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-02 13:10:49,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-05-02 13:10:49,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0405405405405406) internal successors, (154), 148 states have internal predecessors, (154), 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 13:10:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 158 transitions. [2021-05-02 13:10:49,611 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 158 transitions. Word has length 150 [2021-05-02 13:10:49,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:49,611 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 158 transitions. [2021-05-02 13:10:49,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 61 states have internal predecessors, (131), 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 13:10:49,611 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 158 transitions. [2021-05-02 13:10:49,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-05-02 13:10:49,612 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:49,612 INFO L523 BasicCegarLoop]: trace histogram [62, 58, 16, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:49,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:10:49,813 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:49,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:49,814 INFO L82 PathProgramCache]: Analyzing trace with hash -739672007, now seen corresponding path program 57 times [2021-05-02 13:10:49,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:49,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413194191] [2021-05-02 13:10:49,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:51,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 413 proven. 3422 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 13:10:51,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:51,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413194191] [2021-05-02 13:10:51,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413194191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:51,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909840944] [2021-05-02 13:10:51,235 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:10:51,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-02 13:10:51,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:10:51,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 13:10:51,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:51,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:51,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:52,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:52,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:52,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:52,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 422 proven. 136 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2021-05-02 13:10:52,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909840944] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:52,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:52,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 21] total 81 [2021-05-02 13:10:52,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057545866] [2021-05-02 13:10:52,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-02 13:10:52,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:52,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-02 13:10:52,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2041, Invalid=4439, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 13:10:52,103 INFO L87 Difference]: Start difference. First operand 153 states and 158 transitions. Second operand has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 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 13:10:57,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:57,183 INFO L93 Difference]: Finished difference Result 207 states and 229 transitions. [2021-05-02 13:10:57,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 13:10:57,183 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 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 152 [2021-05-02 13:10:57,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:57,184 INFO L225 Difference]: With dead ends: 207 [2021-05-02 13:10:57,184 INFO L226 Difference]: Without dead ends: 176 [2021-05-02 13:10:57,186 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4560 ImplicationChecksByTransitivity, 6261.8ms TimeCoverageRelationStatistics Valid=7887, Invalid=17235, Unknown=0, NotChecked=0, Total=25122 [2021-05-02 13:10:57,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-02 13:10:57,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 156. [2021-05-02 13:10:57,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0397350993377483) internal successors, (157), 151 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 13:10:57,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2021-05-02 13:10:57,198 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 152 [2021-05-02 13:10:57,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:57,198 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2021-05-02 13:10:57,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 80 states have internal predecessors, (158), 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 13:10:57,198 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2021-05-02 13:10:57,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-02 13:10:57,199 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:57,199 INFO L523 BasicCegarLoop]: trace histogram [63, 59, 17, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:57,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-05-02 13:10:57,402 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:57,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:57,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1331876903, now seen corresponding path program 58 times [2021-05-02 13:10:57,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:57,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263939701] [2021-05-02 13:10:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:58,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4122 backedges. 420 proven. 3540 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 13:10:58,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:58,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263939701] [2021-05-02 13:10:58,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263939701] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:58,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923976646] [2021-05-02 13:10:58,934 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:10:59,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:10:59,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:10:59,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-02 13:10:59,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:59,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4122 backedges. 420 proven. 3540 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 13:10:59,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923976646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:59,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:59,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 64 [2021-05-02 13:10:59,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255024371] [2021-05-02 13:10:59,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 13:10:59,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:59,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 13:10:59,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 13:10:59,276 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand has 64 states, 64 states have (on average 2.109375) internal successors, (135), 63 states have internal predecessors, (135), 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 13:11:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:02,434 INFO L93 Difference]: Finished difference Result 190 states and 201 transitions. [2021-05-02 13:11:02,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 13:11:02,434 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 63 states have internal predecessors, (135), 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 155 [2021-05-02 13:11:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:02,435 INFO L225 Difference]: With dead ends: 190 [2021-05-02 13:11:02,435 INFO L226 Difference]: Without dead ends: 158 [2021-05-02 13:11:02,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 4259.3ms TimeCoverageRelationStatistics Valid=5736, Invalid=9516, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 13:11:02,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-02 13:11:02,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-05-02 13:11:02,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0392156862745099) internal successors, (159), 153 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 13:11:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 163 transitions. [2021-05-02 13:11:02,448 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 163 transitions. Word has length 155 [2021-05-02 13:11:02,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:02,449 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 163 transitions. [2021-05-02 13:11:02,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 63 states have internal predecessors, (135), 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 13:11:02,449 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 163 transitions. [2021-05-02 13:11:02,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-02 13:11:02,449 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:02,449 INFO L523 BasicCegarLoop]: trace histogram [64, 60, 17, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:02,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:02,653 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:02,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:02,653 INFO L82 PathProgramCache]: Analyzing trace with hash -335160636, now seen corresponding path program 59 times [2021-05-02 13:11:02,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:02,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989131746] [2021-05-02 13:11:02,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:04,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4249 backedges. 427 proven. 3660 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 13:11:04,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:04,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989131746] [2021-05-02 13:11:04,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989131746] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:04,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459092265] [2021-05-02 13:11:04,305 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:04,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2021-05-02 13:11:04,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:04,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-02 13:11:04,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:04,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4249 backedges. 427 proven. 3660 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 13:11:04,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459092265] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:04,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:04,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63] total 65 [2021-05-02 13:11:04,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103757275] [2021-05-02 13:11:04,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-02 13:11:04,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:04,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-02 13:11:04,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 13:11:04,703 INFO L87 Difference]: Start difference. First operand 158 states and 163 transitions. Second operand has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 64 states have internal predecessors, (137), 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 13:11:07,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:07,935 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2021-05-02 13:11:07,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 13:11:07,936 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 64 states have internal predecessors, (137), 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 157 [2021-05-02 13:11:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:07,937 INFO L225 Difference]: With dead ends: 192 [2021-05-02 13:11:07,937 INFO L226 Difference]: Without dead ends: 160 [2021-05-02 13:11:07,938 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 4425.4ms TimeCoverageRelationStatistics Valid=5923, Invalid=9827, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 13:11:07,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-02 13:11:07,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-05-02 13:11:07,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.038709677419355) internal successors, (161), 155 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 13:11:07,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 165 transitions. [2021-05-02 13:11:07,952 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 165 transitions. Word has length 157 [2021-05-02 13:11:07,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:07,952 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 165 transitions. [2021-05-02 13:11:07,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 64 states have internal predecessors, (137), 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 13:11:07,952 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 165 transitions. [2021-05-02 13:11:07,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-05-02 13:11:07,953 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:07,953 INFO L523 BasicCegarLoop]: trace histogram [65, 61, 17, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:08,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-02 13:11:08,161 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:08,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:08,161 INFO L82 PathProgramCache]: Analyzing trace with hash -335434207, now seen corresponding path program 60 times [2021-05-02 13:11:08,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:08,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285029458] [2021-05-02 13:11:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:09,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 434 proven. 3782 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 13:11:09,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:09,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285029458] [2021-05-02 13:11:09,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285029458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:09,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290705861] [2021-05-02 13:11:09,782 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:09,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 13:11:09,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:09,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 13:11:09,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:10,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 443 proven. 153 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2021-05-02 13:11:10,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290705861] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:10,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:10,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 22] total 85 [2021-05-02 13:11:10,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746079086] [2021-05-02 13:11:10,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-02 13:11:10,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:10,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-02 13:11:10,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2248, Invalid=4892, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 13:11:10,706 INFO L87 Difference]: Start difference. First operand 160 states and 165 transitions. Second operand has 85 states, 85 states have (on average 1.9411764705882353) internal successors, (165), 84 states have internal predecessors, (165), 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 13:11:15,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:15,699 INFO L93 Difference]: Finished difference Result 215 states and 237 transitions. [2021-05-02 13:11:15,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-02 13:11:15,700 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.9411764705882353) internal successors, (165), 84 states have internal predecessors, (165), 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 13:11:15,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:15,701 INFO L225 Difference]: With dead ends: 215 [2021-05-02 13:11:15,701 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 13:11:15,702 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5024 ImplicationChecksByTransitivity, 6778.4ms TimeCoverageRelationStatistics Valid=8722, Invalid=19000, Unknown=0, NotChecked=0, Total=27722 [2021-05-02 13:11:15,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 13:11:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 163. [2021-05-02 13:11:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0379746835443038) internal successors, (164), 158 states have internal predecessors, (164), 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 13:11:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 168 transitions. [2021-05-02 13:11:15,715 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 168 transitions. Word has length 159 [2021-05-02 13:11:15,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:15,715 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 168 transitions. [2021-05-02 13:11:15,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 1.9411764705882353) internal successors, (165), 84 states have internal predecessors, (165), 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 13:11:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 168 transitions. [2021-05-02 13:11:15,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 13:11:15,716 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:15,721 INFO L523 BasicCegarLoop]: trace histogram [66, 62, 18, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:15,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:15,929 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:15,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:15,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1333007131, now seen corresponding path program 61 times [2021-05-02 13:11:15,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:15,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375940424] [2021-05-02 13:11:15,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:17,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 441 proven. 3906 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-02 13:11:17,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:17,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375940424] [2021-05-02 13:11:17,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375940424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:17,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508288637] [2021-05-02 13:11:17,764 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:17,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-02 13:11:17,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:17,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:17,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 441 proven. 3906 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-02 13:11:18,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508288637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:18,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:18,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65] total 67 [2021-05-02 13:11:18,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609828264] [2021-05-02 13:11:18,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 13:11:18,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:18,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 13:11:18,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 13:11:18,160 INFO L87 Difference]: Start difference. First operand 163 states and 168 transitions. Second operand has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 66 states have internal predecessors, (141), 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 13:11:21,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:21,660 INFO L93 Difference]: Finished difference Result 198 states and 209 transitions. [2021-05-02 13:11:21,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 13:11:21,660 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 66 states have internal predecessors, (141), 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 162 [2021-05-02 13:11:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:21,661 INFO L225 Difference]: With dead ends: 198 [2021-05-02 13:11:21,661 INFO L226 Difference]: Without dead ends: 165 [2021-05-02 13:11:21,662 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 4835.4ms TimeCoverageRelationStatistics Valid=6306, Invalid=10464, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 13:11:21,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-02 13:11:21,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-05-02 13:11:21,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.0375) internal successors, (166), 160 states have internal predecessors, (166), 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 13:11:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 170 transitions. [2021-05-02 13:11:21,675 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 170 transitions. Word has length 162 [2021-05-02 13:11:21,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:21,675 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 170 transitions. [2021-05-02 13:11:21,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 66 states have internal predecessors, (141), 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 13:11:21,675 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 170 transitions. [2021-05-02 13:11:21,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-05-02 13:11:21,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:21,676 INFO L523 BasicCegarLoop]: trace histogram [67, 63, 18, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:21,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-02 13:11:21,890 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:21,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:21,890 INFO L82 PathProgramCache]: Analyzing trace with hash 581872552, now seen corresponding path program 62 times [2021-05-02 13:11:21,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:21,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500442024] [2021-05-02 13:11:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:23,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 448 proven. 4032 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-02 13:11:23,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:23,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500442024] [2021-05-02 13:11:23,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500442024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:23,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36124230] [2021-05-02 13:11:23,645 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:23,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:11:23,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:23,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-02 13:11:23,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:23,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:24,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:24,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:24,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:24,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 448 proven. 4032 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-02 13:11:24,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36124230] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:24,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:24,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66] total 68 [2021-05-02 13:11:24,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450446216] [2021-05-02 13:11:24,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 13:11:24,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:24,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 13:11:24,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 13:11:24,054 INFO L87 Difference]: Start difference. First operand 165 states and 170 transitions. Second operand has 68 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 67 states have internal predecessors, (143), 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 13:11:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:27,541 INFO L93 Difference]: Finished difference Result 200 states and 211 transitions. [2021-05-02 13:11:27,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 13:11:27,542 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 67 states have internal predecessors, (143), 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 164 [2021-05-02 13:11:27,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:27,543 INFO L225 Difference]: With dead ends: 200 [2021-05-02 13:11:27,543 INFO L226 Difference]: Without dead ends: 167 [2021-05-02 13:11:27,544 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2265 ImplicationChecksByTransitivity, 4819.3ms TimeCoverageRelationStatistics Valid=6502, Invalid=10790, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 13:11:27,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-02 13:11:27,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-05-02 13:11:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.037037037037037) internal successors, (168), 162 states have internal predecessors, (168), 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 13:11:27,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 172 transitions. [2021-05-02 13:11:27,557 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 172 transitions. Word has length 164 [2021-05-02 13:11:27,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:27,557 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 172 transitions. [2021-05-02 13:11:27,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 67 states have internal predecessors, (143), 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 13:11:27,558 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 172 transitions. [2021-05-02 13:11:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-05-02 13:11:27,558 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:27,558 INFO L523 BasicCegarLoop]: trace histogram [68, 64, 18, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:27,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:27,759 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:27,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:27,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1759722069, now seen corresponding path program 63 times [2021-05-02 13:11:27,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:27,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448530098] [2021-05-02 13:11:27,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:29,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4795 backedges. 455 proven. 4160 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-02 13:11:29,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:29,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448530098] [2021-05-02 13:11:29,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448530098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:29,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166256936] [2021-05-02 13:11:29,529 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:29,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 13:11:29,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:29,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 13:11:29,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:29,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4795 backedges. 576 proven. 16 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2021-05-02 13:11:30,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166256936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:30,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:30,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 7] total 73 [2021-05-02 13:11:30,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860831391] [2021-05-02 13:11:30,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 13:11:30,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:30,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 13:11:30,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 13:11:30,080 INFO L87 Difference]: Start difference. First operand 167 states and 172 transitions. Second operand has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 72 states have internal predecessors, (155), 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 13:11:34,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:34,003 INFO L93 Difference]: Finished difference Result 205 states and 219 transitions. [2021-05-02 13:11:34,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 13:11:34,004 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 72 states have internal predecessors, (155), 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 166 [2021-05-02 13:11:34,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:34,004 INFO L225 Difference]: With dead ends: 205 [2021-05-02 13:11:34,004 INFO L226 Difference]: Without dead ends: 172 [2021-05-02 13:11:34,006 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 5563.5ms TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2021-05-02 13:11:34,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-02 13:11:34,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2021-05-02 13:11:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0421686746987953) internal successors, (173), 166 states have internal predecessors, (173), 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 13:11:34,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 177 transitions. [2021-05-02 13:11:34,019 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 177 transitions. Word has length 166 [2021-05-02 13:11:34,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:34,019 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 177 transitions. [2021-05-02 13:11:34,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 72 states have internal predecessors, (155), 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 13:11:34,020 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 177 transitions. [2021-05-02 13:11:34,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-02 13:11:34,020 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:34,020 INFO L523 BasicCegarLoop]: trace histogram [70, 65, 18, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:34,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-02 13:11:34,221 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:34,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:34,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1609088141, now seen corresponding path program 64 times [2021-05-02 13:11:34,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:34,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348969025] [2021-05-02 13:11:34,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:36,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 594 proven. 4290 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 13:11:36,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:36,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348969025] [2021-05-02 13:11:36,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348969025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:36,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648014185] [2021-05-02 13:11:36,064 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:36,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:11:36,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:36,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-02 13:11:36,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:36,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 594 proven. 4290 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 13:11:36,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648014185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:36,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:36,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68] total 70 [2021-05-02 13:11:36,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735107050] [2021-05-02 13:11:36,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 13:11:36,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:36,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 13:11:36,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 13:11:36,460 INFO L87 Difference]: Start difference. First operand 171 states and 177 transitions. Second operand has 70 states, 70 states have (on average 2.1) internal successors, (147), 69 states have internal predecessors, (147), 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 13:11:40,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:40,397 INFO L93 Difference]: Finished difference Result 208 states and 221 transitions. [2021-05-02 13:11:40,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 13:11:40,397 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1) internal successors, (147), 69 states have internal predecessors, (147), 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 170 [2021-05-02 13:11:40,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:40,398 INFO L225 Difference]: With dead ends: 208 [2021-05-02 13:11:40,398 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 13:11:40,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2402 ImplicationChecksByTransitivity, 5281.0ms TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 13:11:40,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 13:11:40,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-02 13:11:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0416666666666667) internal successors, (175), 168 states have internal predecessors, (175), 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 13:11:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 179 transitions. [2021-05-02 13:11:40,413 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 179 transitions. Word has length 170 [2021-05-02 13:11:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:40,413 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 179 transitions. [2021-05-02 13:11:40,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.1) internal successors, (147), 69 states have internal predecessors, (147), 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 13:11:40,413 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 179 transitions. [2021-05-02 13:11:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-05-02 13:11:40,414 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:40,414 INFO L523 BasicCegarLoop]: trace histogram [71, 66, 18, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:40,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-02 13:11:40,614 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:40,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:40,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1967354058, now seen corresponding path program 65 times [2021-05-02 13:11:40,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:40,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39181293] [2021-05-02 13:11:40,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:42,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5212 backedges. 603 proven. 4422 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 13:11:42,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:42,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39181293] [2021-05-02 13:11:42,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39181293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:42,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112806536] [2021-05-02 13:11:42,473 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:42,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2021-05-02 13:11:42,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:42,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-02 13:11:42,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:42,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5212 backedges. 603 proven. 4422 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 13:11:42,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112806536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:42,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:42,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69] total 71 [2021-05-02 13:11:42,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513121499] [2021-05-02 13:11:42,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 13:11:42,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:42,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 13:11:42,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 13:11:42,895 INFO L87 Difference]: Start difference. First operand 173 states and 179 transitions. Second operand has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 70 states have internal predecessors, (149), 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 13:11:46,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:46,612 INFO L93 Difference]: Finished difference Result 210 states and 223 transitions. [2021-05-02 13:11:46,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 13:11:46,612 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 70 states have internal predecessors, (149), 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 172 [2021-05-02 13:11:46,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:46,613 INFO L225 Difference]: With dead ends: 210 [2021-05-02 13:11:46,613 INFO L226 Difference]: Without dead ends: 175 [2021-05-02 13:11:46,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2472 ImplicationChecksByTransitivity, 5130.9ms TimeCoverageRelationStatistics Valid=7108, Invalid=11798, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 13:11:46,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-02 13:11:46,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-05-02 13:11:46,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0411764705882354) internal successors, (177), 170 states have internal predecessors, (177), 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 13:11:46,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 181 transitions. [2021-05-02 13:11:46,630 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 181 transitions. Word has length 172 [2021-05-02 13:11:46,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:46,630 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 181 transitions. [2021-05-02 13:11:46,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 70 states have internal predecessors, (149), 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 13:11:46,630 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 181 transitions. [2021-05-02 13:11:46,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-05-02 13:11:46,631 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:46,631 INFO L523 BasicCegarLoop]: trace histogram [72, 67, 18, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:46,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-02 13:11:46,845 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:46,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:46,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1631450681, now seen corresponding path program 66 times [2021-05-02 13:11:46,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:46,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485045338] [2021-05-02 13:11:46,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:48,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 612 proven. 4556 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 13:11:48,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:48,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485045338] [2021-05-02 13:11:48,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485045338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:48,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202741868] [2021-05-02 13:11:48,840 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:48,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 13:11:48,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:48,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 13:11:48,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:49,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 628 proven. 171 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-05-02 13:11:50,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202741868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:50,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:50,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 24] total 93 [2021-05-02 13:11:50,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317956295] [2021-05-02 13:11:50,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-02 13:11:50,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:50,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-02 13:11:50,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2692, Invalid=5864, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 13:11:50,019 INFO L87 Difference]: Start difference. First operand 175 states and 181 transitions. Second operand has 93 states, 93 states have (on average 1.935483870967742) internal successors, (180), 92 states have internal predecessors, (180), 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 13:11:56,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:56,440 INFO L93 Difference]: Finished difference Result 243 states and 272 transitions. [2021-05-02 13:11:56,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-02 13:11:56,440 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.935483870967742) internal successors, (180), 92 states have internal predecessors, (180), 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 174 [2021-05-02 13:11:56,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:56,441 INFO L225 Difference]: With dead ends: 243 [2021-05-02 13:11:56,441 INFO L226 Difference]: Without dead ends: 208 [2021-05-02 13:11:56,443 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6133 ImplicationChecksByTransitivity, 8391.4ms TimeCoverageRelationStatistics Valid=10382, Invalid=22924, Unknown=0, NotChecked=0, Total=33306 [2021-05-02 13:11:56,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-02 13:11:56,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 178. [2021-05-02 13:11:56,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0404624277456647) internal successors, (180), 173 states have internal predecessors, (180), 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 13:11:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 184 transitions. [2021-05-02 13:11:56,458 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 184 transitions. Word has length 174 [2021-05-02 13:11:56,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:56,458 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 184 transitions. [2021-05-02 13:11:56,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 93 states have (on average 1.935483870967742) internal successors, (180), 92 states have internal predecessors, (180), 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 13:11:56,458 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 184 transitions. [2021-05-02 13:11:56,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-05-02 13:11:56,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:56,459 INFO L523 BasicCegarLoop]: trace histogram [73, 68, 19, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:56,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:56,673 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:56,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:56,674 INFO L82 PathProgramCache]: Analyzing trace with hash 89238119, now seen corresponding path program 67 times [2021-05-02 13:11:56,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:56,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973067734] [2021-05-02 13:11:56,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:58,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5519 backedges. 621 proven. 4692 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-05-02 13:11:58,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:58,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973067734] [2021-05-02 13:11:58,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973067734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:58,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493127282] [2021-05-02 13:11:58,716 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:58,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 13:11:58,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:58,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:58,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5519 backedges. 621 proven. 4692 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-05-02 13:11:59,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493127282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:59,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:59,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71] total 73 [2021-05-02 13:11:59,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026181417] [2021-05-02 13:11:59,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 13:11:59,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:59,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 13:11:59,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 13:11:59,118 INFO L87 Difference]: Start difference. First operand 178 states and 184 transitions. Second operand has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 72 states have internal predecessors, (153), 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 13:12:03,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:03,120 INFO L93 Difference]: Finished difference Result 216 states and 229 transitions. [2021-05-02 13:12:03,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 13:12:03,121 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 72 states have internal predecessors, (153), 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 177 [2021-05-02 13:12:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:03,125 INFO L225 Difference]: With dead ends: 216 [2021-05-02 13:12:03,125 INFO L226 Difference]: Without dead ends: 180 [2021-05-02 13:12:03,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 5625.6ms TimeCoverageRelationStatistics Valid=7527, Invalid=12495, Unknown=0, NotChecked=0, Total=20022 [2021-05-02 13:12:03,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-02 13:12:03,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-05-02 13:12:03,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.04) internal successors, (182), 175 states have internal predecessors, (182), 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 13:12:03,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 186 transitions. [2021-05-02 13:12:03,141 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 186 transitions. Word has length 177 [2021-05-02 13:12:03,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:03,141 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 186 transitions. [2021-05-02 13:12:03,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 72 states have internal predecessors, (153), 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 13:12:03,142 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 186 transitions. [2021-05-02 13:12:03,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-05-02 13:12:03,142 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:03,142 INFO L523 BasicCegarLoop]: trace histogram [74, 69, 19, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:03,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:03,357 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:03,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:03,357 INFO L82 PathProgramCache]: Analyzing trace with hash -541643452, now seen corresponding path program 68 times [2021-05-02 13:12:03,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:03,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815617453] [2021-05-02 13:12:03,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:05,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5666 backedges. 630 proven. 4830 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-05-02 13:12:05,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:05,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815617453] [2021-05-02 13:12:05,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815617453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:05,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979012247] [2021-05-02 13:12:05,529 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:05,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:12:05,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:05,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 71 conjunts are in the unsatisfiable core [2021-05-02 13:12:05,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:05,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5666 backedges. 630 proven. 4830 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-05-02 13:12:05,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979012247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:05,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:05,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72] total 74 [2021-05-02 13:12:05,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411406086] [2021-05-02 13:12:05,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 13:12:05,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:05,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 13:12:05,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 13:12:05,995 INFO L87 Difference]: Start difference. First operand 180 states and 186 transitions. Second operand has 74 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 73 states have internal predecessors, (155), 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 13:12:10,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:10,365 INFO L93 Difference]: Finished difference Result 218 states and 231 transitions. [2021-05-02 13:12:10,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 13:12:10,366 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 73 states have internal predecessors, (155), 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 179 [2021-05-02 13:12:10,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:10,367 INFO L225 Difference]: With dead ends: 218 [2021-05-02 13:12:10,367 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 13:12:10,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2688 ImplicationChecksByTransitivity, 5978.3ms TimeCoverageRelationStatistics Valid=7741, Invalid=12851, Unknown=0, NotChecked=0, Total=20592 [2021-05-02 13:12:10,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 13:12:10,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-05-02 13:12:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.03954802259887) internal successors, (184), 177 states have internal predecessors, (184), 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 13:12:10,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 188 transitions. [2021-05-02 13:12:10,383 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 188 transitions. Word has length 179 [2021-05-02 13:12:10,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:10,383 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 188 transitions. [2021-05-02 13:12:10,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 73 states have internal predecessors, (155), 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 13:12:10,383 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 188 transitions. [2021-05-02 13:12:10,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-05-02 13:12:10,384 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:10,384 INFO L523 BasicCegarLoop]: trace histogram [75, 70, 19, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:10,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:10,586 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:10,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:10,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1228444447, now seen corresponding path program 69 times [2021-05-02 13:12:10,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:10,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450216049] [2021-05-02 13:12:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:12,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5815 backedges. 639 proven. 4970 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-05-02 13:12:12,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:12,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450216049] [2021-05-02 13:12:12,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450216049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:12,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361813169] [2021-05-02 13:12:12,814 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:12,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-05-02 13:12:12,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:12,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 13:12:12,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:13,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5815 backedges. 655 proven. 190 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2021-05-02 13:12:14,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361813169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:14,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:14,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 25] total 97 [2021-05-02 13:12:14,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607596158] [2021-05-02 13:12:14,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-02 13:12:14,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:14,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-02 13:12:14,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2929, Invalid=6383, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 13:12:14,015 INFO L87 Difference]: Start difference. First operand 182 states and 188 transitions. Second operand has 97 states, 97 states have (on average 1.9278350515463918) internal successors, (187), 96 states have internal predecessors, (187), 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 13:12:21,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:21,573 INFO L93 Difference]: Finished difference Result 251 states and 280 transitions. [2021-05-02 13:12:21,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-02 13:12:21,574 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.9278350515463918) internal successors, (187), 96 states have internal predecessors, (187), 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 181 [2021-05-02 13:12:21,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:21,575 INFO L225 Difference]: With dead ends: 251 [2021-05-02 13:12:21,575 INFO L226 Difference]: Without dead ends: 215 [2021-05-02 13:12:21,576 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6670 ImplicationChecksByTransitivity, 9407.2ms TimeCoverageRelationStatistics Valid=11337, Invalid=24953, Unknown=0, NotChecked=0, Total=36290 [2021-05-02 13:12:21,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-02 13:12:21,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 185. [2021-05-02 13:12:21,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.038888888888889) internal successors, (187), 180 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 13:12:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 191 transitions. [2021-05-02 13:12:21,592 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 191 transitions. Word has length 181 [2021-05-02 13:12:21,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:21,592 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 191 transitions. [2021-05-02 13:12:21,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 1.9278350515463918) internal successors, (187), 96 states have internal predecessors, (187), 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 13:12:21,592 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 191 transitions. [2021-05-02 13:12:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-05-02 13:12:21,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:21,593 INFO L523 BasicCegarLoop]: trace histogram [76, 71, 20, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:21,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-05-02 13:12:21,801 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:21,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:21,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1344221669, now seen corresponding path program 70 times [2021-05-02 13:12:21,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:21,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62977702] [2021-05-02 13:12:21,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:24,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 648 proven. 5112 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-05-02 13:12:24,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:24,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62977702] [2021-05-02 13:12:24,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62977702] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:24,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136205524] [2021-05-02 13:12:24,037 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:24,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:12:24,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:24,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-02 13:12:24,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:24,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 648 proven. 5112 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-05-02 13:12:24,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136205524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:24,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:24,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74] total 76 [2021-05-02 13:12:24,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831293758] [2021-05-02 13:12:24,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 13:12:24,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:24,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 13:12:24,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 13:12:24,518 INFO L87 Difference]: Start difference. First operand 185 states and 191 transitions. Second operand has 76 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 75 states have internal predecessors, (159), 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 13:12:28,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:28,989 INFO L93 Difference]: Finished difference Result 224 states and 237 transitions. [2021-05-02 13:12:28,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 13:12:28,990 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 75 states have internal predecessors, (159), 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 184 [2021-05-02 13:12:28,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:28,991 INFO L225 Difference]: With dead ends: 224 [2021-05-02 13:12:28,991 INFO L226 Difference]: Without dead ends: 187 [2021-05-02 13:12:28,992 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2837 ImplicationChecksByTransitivity, 6281.6ms TimeCoverageRelationStatistics Valid=8178, Invalid=13578, Unknown=0, NotChecked=0, Total=21756 [2021-05-02 13:12:28,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-02 13:12:29,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2021-05-02 13:12:29,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0384615384615385) internal successors, (189), 182 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 13:12:29,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 193 transitions. [2021-05-02 13:12:29,012 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 193 transitions. Word has length 184 [2021-05-02 13:12:29,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:29,012 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 193 transitions. [2021-05-02 13:12:29,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 75 states have internal predecessors, (159), 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 13:12:29,012 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 193 transitions. [2021-05-02 13:12:29,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-05-02 13:12:29,013 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:29,013 INFO L523 BasicCegarLoop]: trace histogram [77, 72, 20, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:29,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:29,227 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:29,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:29,228 INFO L82 PathProgramCache]: Analyzing trace with hash -263771032, now seen corresponding path program 71 times [2021-05-02 13:12:29,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:29,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119289055] [2021-05-02 13:12:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:31,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 657 proven. 5256 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-05-02 13:12:31,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:31,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119289055] [2021-05-02 13:12:31,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119289055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:31,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624180521] [2021-05-02 13:12:31,658 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:31,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2021-05-02 13:12:31,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:31,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-02 13:12:31,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:31,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 657 proven. 5256 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-05-02 13:12:32,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624180521] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:32,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:32,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75] total 77 [2021-05-02 13:12:32,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878546669] [2021-05-02 13:12:32,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-02 13:12:32,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:32,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-02 13:12:32,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 13:12:32,173 INFO L87 Difference]: Start difference. First operand 187 states and 193 transitions. Second operand has 77 states, 77 states have (on average 2.090909090909091) internal successors, (161), 76 states have internal predecessors, (161), 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 13:12:37,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:37,019 INFO L93 Difference]: Finished difference Result 226 states and 239 transitions. [2021-05-02 13:12:37,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 13:12:37,020 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.090909090909091) internal successors, (161), 76 states have internal predecessors, (161), 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 186 [2021-05-02 13:12:37,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:37,020 INFO L225 Difference]: With dead ends: 226 [2021-05-02 13:12:37,021 INFO L226 Difference]: Without dead ends: 189 [2021-05-02 13:12:37,022 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2913 ImplicationChecksByTransitivity, 6702.8ms TimeCoverageRelationStatistics Valid=8401, Invalid=13949, Unknown=0, NotChecked=0, Total=22350 [2021-05-02 13:12:37,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-02 13:12:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-05-02 13:12:37,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.0380434782608696) internal successors, (191), 184 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 13:12:37,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 195 transitions. [2021-05-02 13:12:37,038 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 195 transitions. Word has length 186 [2021-05-02 13:12:37,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:37,038 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 195 transitions. [2021-05-02 13:12:37,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 2.090909090909091) internal successors, (161), 76 states have internal predecessors, (161), 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 13:12:37,038 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 195 transitions. [2021-05-02 13:12:37,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-05-02 13:12:37,039 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:37,039 INFO L523 BasicCegarLoop]: trace histogram [78, 73, 20, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:37,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:37,253 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:37,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:37,253 INFO L82 PathProgramCache]: Analyzing trace with hash 643469867, now seen corresponding path program 72 times [2021-05-02 13:12:37,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:37,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34809466] [2021-05-02 13:12:37,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:39,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6294 backedges. 666 proven. 5402 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-05-02 13:12:39,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:39,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34809466] [2021-05-02 13:12:39,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34809466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:39,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247610232] [2021-05-02 13:12:39,916 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:39,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-05-02 13:12:39,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:39,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 13:12:39,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:40,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6294 backedges. 682 proven. 210 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2021-05-02 13:12:41,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247610232] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:41,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:41,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 26] total 101 [2021-05-02 13:12:41,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101342851] [2021-05-02 13:12:41,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-02 13:12:41,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:41,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-02 13:12:41,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3176, Invalid=6924, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 13:12:41,339 INFO L87 Difference]: Start difference. First operand 189 states and 195 transitions. Second operand has 101 states, 101 states have (on average 1.9207920792079207) internal successors, (194), 100 states have internal predecessors, (194), 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 13:12:49,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:49,706 INFO L93 Difference]: Finished difference Result 259 states and 288 transitions. [2021-05-02 13:12:49,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-02 13:12:49,707 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.9207920792079207) internal successors, (194), 100 states have internal predecessors, (194), 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 188 [2021-05-02 13:12:49,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:49,708 INFO L225 Difference]: With dead ends: 259 [2021-05-02 13:12:49,708 INFO L226 Difference]: Without dead ends: 222 [2021-05-02 13:12:49,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7229 ImplicationChecksByTransitivity, 10785.4ms TimeCoverageRelationStatistics Valid=12334, Invalid=27068, Unknown=0, NotChecked=0, Total=39402 [2021-05-02 13:12:49,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-02 13:12:49,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 192. [2021-05-02 13:12:49,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0374331550802138) internal successors, (194), 187 states have internal predecessors, (194), 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 13:12:49,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 198 transitions. [2021-05-02 13:12:49,727 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 198 transitions. Word has length 188 [2021-05-02 13:12:49,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:49,727 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 198 transitions. [2021-05-02 13:12:49,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 101 states, 101 states have (on average 1.9207920792079207) internal successors, (194), 100 states have internal predecessors, (194), 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 13:12:49,727 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 198 transitions. [2021-05-02 13:12:49,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-05-02 13:12:49,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:49,728 INFO L523 BasicCegarLoop]: trace histogram [79, 74, 21, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:49,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:49,941 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:49,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:49,941 INFO L82 PathProgramCache]: Analyzing trace with hash -2107304459, now seen corresponding path program 73 times [2021-05-02 13:12:49,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:49,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99924264] [2021-05-02 13:12:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:52,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6472 backedges. 675 proven. 5550 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-05-02 13:12:52,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:52,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99924264] [2021-05-02 13:12:52,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99924264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:52,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544046174] [2021-05-02 13:12:52,525 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:52,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-02 13:12:52,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:52,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6472 backedges. 675 proven. 5550 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-05-02 13:12:53,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544046174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:53,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:53,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77] total 79 [2021-05-02 13:12:53,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238566272] [2021-05-02 13:12:53,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 13:12:53,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:53,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 13:12:53,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 13:12:53,044 INFO L87 Difference]: Start difference. First operand 192 states and 198 transitions. Second operand has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 78 states have internal predecessors, (165), 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 13:12:58,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:58,209 INFO L93 Difference]: Finished difference Result 232 states and 245 transitions. [2021-05-02 13:12:58,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 13:12:58,210 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 78 states have internal predecessors, (165), 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 13:12:58,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:58,210 INFO L225 Difference]: With dead ends: 232 [2021-05-02 13:12:58,211 INFO L226 Difference]: Without dead ends: 194 [2021-05-02 13:12:58,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3068 ImplicationChecksByTransitivity, 7230.7ms TimeCoverageRelationStatistics Valid=8856, Invalid=14706, Unknown=0, NotChecked=0, Total=23562 [2021-05-02 13:12:58,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-02 13:12:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2021-05-02 13:12:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.037037037037037) internal successors, (196), 189 states have internal predecessors, (196), 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 13:12:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 200 transitions. [2021-05-02 13:12:58,239 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 200 transitions. Word has length 191 [2021-05-02 13:12:58,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:58,239 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 200 transitions. [2021-05-02 13:12:58,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 78 states have internal predecessors, (165), 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 13:12:58,239 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 200 transitions. [2021-05-02 13:12:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-05-02 13:12:58,240 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:58,240 INFO L523 BasicCegarLoop]: trace histogram [80, 75, 21, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:58,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-02 13:12:58,441 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:58,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:58,441 INFO L82 PathProgramCache]: Analyzing trace with hash -966143470, now seen corresponding path program 74 times [2021-05-02 13:12:58,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:58,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654044064] [2021-05-02 13:12:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:01,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6631 backedges. 684 proven. 5700 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-05-02 13:13:01,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:01,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654044064] [2021-05-02 13:13:01,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654044064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:01,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158650325] [2021-05-02 13:13:01,193 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:01,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:13:01,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:13:01,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 77 conjunts are in the unsatisfiable core [2021-05-02 13:13:01,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:01,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6631 backedges. 684 proven. 5700 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-05-02 13:13:01,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158650325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:01,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:01,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78] total 80 [2021-05-02 13:13:01,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355489566] [2021-05-02 13:13:01,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 13:13:01,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:01,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 13:13:01,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 13:13:01,702 INFO L87 Difference]: Start difference. First operand 194 states and 200 transitions. Second operand has 80 states, 80 states have (on average 2.0875) internal successors, (167), 79 states have internal predecessors, (167), 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 13:13:06,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:06,891 INFO L93 Difference]: Finished difference Result 234 states and 247 transitions. [2021-05-02 13:13:06,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 13:13:06,891 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0875) internal successors, (167), 79 states have internal predecessors, (167), 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 193 [2021-05-02 13:13:06,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:06,892 INFO L225 Difference]: With dead ends: 234 [2021-05-02 13:13:06,892 INFO L226 Difference]: Without dead ends: 196 [2021-05-02 13:13:06,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3147 ImplicationChecksByTransitivity, 7392.2ms TimeCoverageRelationStatistics Valid=9088, Invalid=15092, Unknown=0, NotChecked=0, Total=24180 [2021-05-02 13:13:06,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-02 13:13:06,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-05-02 13:13:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.036649214659686) internal successors, (198), 191 states have internal predecessors, (198), 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 13:13:06,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 202 transitions. [2021-05-02 13:13:06,911 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 202 transitions. Word has length 193 [2021-05-02 13:13:06,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:06,911 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 202 transitions. [2021-05-02 13:13:06,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 2.0875) internal successors, (167), 79 states have internal predecessors, (167), 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 13:13:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 202 transitions. [2021-05-02 13:13:06,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-02 13:13:06,912 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:06,912 INFO L523 BasicCegarLoop]: trace histogram [81, 76, 21, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:07,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:07,113 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:07,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:07,113 INFO L82 PathProgramCache]: Analyzing trace with hash 472906479, now seen corresponding path program 75 times [2021-05-02 13:13:07,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:07,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696349396] [2021-05-02 13:13:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:09,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6792 backedges. 693 proven. 5852 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-05-02 13:13:09,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:09,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696349396] [2021-05-02 13:13:09,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696349396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:09,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072099595] [2021-05-02 13:13:09,974 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:10,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-02 13:13:10,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:13:10,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 13:13:10,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:10,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6792 backedges. 709 proven. 231 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2021-05-02 13:13:11,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072099595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:11,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:11,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 27] total 105 [2021-05-02 13:13:11,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631965614] [2021-05-02 13:13:11,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2021-05-02 13:13:11,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:11,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-05-02 13:13:11,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3433, Invalid=7487, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 13:13:11,650 INFO L87 Difference]: Start difference. First operand 196 states and 202 transitions. Second operand has 105 states, 105 states have (on average 1.9142857142857144) internal successors, (201), 104 states have internal predecessors, (201), 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 13:13:21,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:21,323 INFO L93 Difference]: Finished difference Result 267 states and 296 transitions. [2021-05-02 13:13:21,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-02 13:13:21,324 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9142857142857144) internal successors, (201), 104 states have internal predecessors, (201), 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 195 [2021-05-02 13:13:21,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:21,325 INFO L225 Difference]: With dead ends: 267 [2021-05-02 13:13:21,325 INFO L226 Difference]: Without dead ends: 229 [2021-05-02 13:13:21,328 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7810 ImplicationChecksByTransitivity, 12431.4ms TimeCoverageRelationStatistics Valid=13373, Invalid=29269, Unknown=0, NotChecked=0, Total=42642 [2021-05-02 13:13:21,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-02 13:13:21,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 199. [2021-05-02 13:13:21,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0360824742268042) internal successors, (201), 194 states have internal predecessors, (201), 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 13:13:21,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 205 transitions. [2021-05-02 13:13:21,345 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 205 transitions. Word has length 195 [2021-05-02 13:13:21,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:21,346 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 205 transitions. [2021-05-02 13:13:21,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 105 states, 105 states have (on average 1.9142857142857144) internal successors, (201), 104 states have internal predecessors, (201), 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 13:13:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 205 transitions. [2021-05-02 13:13:21,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-05-02 13:13:21,346 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:21,347 INFO L523 BasicCegarLoop]: trace histogram [82, 77, 22, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:21,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-02 13:13:21,547 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:21,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:21,548 INFO L82 PathProgramCache]: Analyzing trace with hash 184218711, now seen corresponding path program 76 times [2021-05-02 13:13:21,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:21,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289242583] [2021-05-02 13:13:21,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:24,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6977 backedges. 702 proven. 6006 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-05-02 13:13:24,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:24,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289242583] [2021-05-02 13:13:24,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289242583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:24,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240555432] [2021-05-02 13:13:24,568 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:24,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:13:24,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:13:24,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 79 conjunts are in the unsatisfiable core [2021-05-02 13:13:24,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:24,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6977 backedges. 702 proven. 6006 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-05-02 13:13:25,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240555432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:25,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:25,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80] total 82 [2021-05-02 13:13:25,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412528737] [2021-05-02 13:13:25,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 13:13:25,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:25,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 13:13:25,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 13:13:25,132 INFO L87 Difference]: Start difference. First operand 199 states and 205 transitions. Second operand has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 81 states have internal predecessors, (171), 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 13:13:31,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:31,262 INFO L93 Difference]: Finished difference Result 240 states and 253 transitions. [2021-05-02 13:13:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 13:13:31,263 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 81 states have internal predecessors, (171), 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 198 [2021-05-02 13:13:31,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:31,264 INFO L225 Difference]: With dead ends: 240 [2021-05-02 13:13:31,264 INFO L226 Difference]: Without dead ends: 201 [2021-05-02 13:13:31,265 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3308 ImplicationChecksByTransitivity, 8431.3ms TimeCoverageRelationStatistics Valid=9561, Invalid=15879, Unknown=0, NotChecked=0, Total=25440 [2021-05-02 13:13:31,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-02 13:13:31,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-05-02 13:13:31,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0357142857142858) internal successors, (203), 196 states have internal predecessors, (203), 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 13:13:31,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 207 transitions. [2021-05-02 13:13:31,283 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 207 transitions. Word has length 198 [2021-05-02 13:13:31,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:31,283 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 207 transitions. [2021-05-02 13:13:31,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 81 states have internal predecessors, (171), 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 13:13:31,284 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 207 transitions. [2021-05-02 13:13:31,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-02 13:13:31,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:31,284 INFO L523 BasicCegarLoop]: trace histogram [83, 78, 22, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:31,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:31,501 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:31,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:31,501 INFO L82 PathProgramCache]: Analyzing trace with hash 468503962, now seen corresponding path program 77 times [2021-05-02 13:13:31,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:31,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862765791] [2021-05-02 13:13:31,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:34,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7142 backedges. 711 proven. 6162 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-05-02 13:13:34,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:34,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862765791] [2021-05-02 13:13:34,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862765791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:34,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578483385] [2021-05-02 13:13:34,567 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:34,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2021-05-02 13:13:34,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:13:34,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 13:13:34,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:34,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:34,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7142 backedges. 711 proven. 6162 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-05-02 13:13:35,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578483385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:35,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:35,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81] total 83 [2021-05-02 13:13:35,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626144803] [2021-05-02 13:13:35,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 13:13:35,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:35,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 13:13:35,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 13:13:35,168 INFO L87 Difference]: Start difference. First operand 201 states and 207 transitions. Second operand has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 82 states have internal predecessors, (173), 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 13:13:40,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:40,967 INFO L93 Difference]: Finished difference Result 242 states and 255 transitions. [2021-05-02 13:13:40,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 13:13:40,968 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 82 states have internal predecessors, (173), 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 200 [2021-05-02 13:13:40,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:40,969 INFO L225 Difference]: With dead ends: 242 [2021-05-02 13:13:40,969 INFO L226 Difference]: Without dead ends: 203 [2021-05-02 13:13:40,970 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3390 ImplicationChecksByTransitivity, 8370.8ms TimeCoverageRelationStatistics Valid=9802, Invalid=16280, Unknown=0, NotChecked=0, Total=26082 [2021-05-02 13:13:40,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-02 13:13:40,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2021-05-02 13:13:40,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.0353535353535352) internal successors, (205), 198 states have internal predecessors, (205), 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 13:13:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 209 transitions. [2021-05-02 13:13:40,988 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 209 transitions. Word has length 200 [2021-05-02 13:13:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:40,989 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 209 transitions. [2021-05-02 13:13:40,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 82 states have internal predecessors, (173), 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 13:13:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 209 transitions. [2021-05-02 13:13:40,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-05-02 13:13:40,990 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:40,990 INFO L523 BasicCegarLoop]: trace histogram [84, 79, 22, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:41,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:41,202 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:41,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:41,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1211276771, now seen corresponding path program 78 times [2021-05-02 13:13:41,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:41,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916115147] [2021-05-02 13:13:41,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:44,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7309 backedges. 720 proven. 6320 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-05-02 13:13:44,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:44,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916115147] [2021-05-02 13:13:44,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916115147] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:44,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748100848] [2021-05-02 13:13:44,233 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:44,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-05-02 13:13:44,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:13:44,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 13:13:44,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:44,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:45,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:45,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:45,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7309 backedges. 869 proven. 25 refuted. 0 times theorem prover too weak. 6415 trivial. 0 not checked. [2021-05-02 13:13:45,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748100848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:45,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:45,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 8] total 89 [2021-05-02 13:13:45,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917482624] [2021-05-02 13:13:45,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-02 13:13:45,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:45,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-02 13:13:45,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 13:13:45,127 INFO L87 Difference]: Start difference. First operand 203 states and 209 transitions. Second operand has 89 states, 89 states have (on average 2.101123595505618) internal successors, (187), 88 states have internal predecessors, (187), 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 13:13:52,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:52,952 INFO L93 Difference]: Finished difference Result 247 states and 263 transitions. [2021-05-02 13:13:52,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-02 13:13:52,953 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.101123595505618) internal successors, (187), 88 states have internal predecessors, (187), 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 202 [2021-05-02 13:13:52,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:52,954 INFO L225 Difference]: With dead ends: 247 [2021-05-02 13:13:52,954 INFO L226 Difference]: Without dead ends: 208 [2021-05-02 13:13:52,955 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3734 ImplicationChecksByTransitivity, 10555.4ms TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2021-05-02 13:13:52,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-02 13:13:52,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-05-02 13:13:52,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.0396039603960396) internal successors, (210), 202 states have internal predecessors, (210), 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 13:13:52,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 214 transitions. [2021-05-02 13:13:52,974 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 214 transitions. Word has length 202 [2021-05-02 13:13:52,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:52,975 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 214 transitions. [2021-05-02 13:13:52,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 2.101123595505618) internal successors, (187), 88 states have internal predecessors, (187), 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 13:13:52,975 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 214 transitions. [2021-05-02 13:13:52,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-05-02 13:13:52,976 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:52,976 INFO L523 BasicCegarLoop]: trace histogram [86, 80, 22, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:53,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:53,177 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:53,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:53,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1216965477, now seen corresponding path program 79 times [2021-05-02 13:13:53,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:53,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451565281] [2021-05-02 13:13:53,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:56,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7649 backedges. 891 proven. 6480 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-05-02 13:13:56,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:56,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451565281] [2021-05-02 13:13:56,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451565281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:56,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019338474] [2021-05-02 13:13:56,471 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:56,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 82 conjunts are in the unsatisfiable core [2021-05-02 13:13:56,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:56,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:56,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7649 backedges. 891 proven. 6480 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-05-02 13:13:57,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019338474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:57,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:57,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83] total 85 [2021-05-02 13:13:57,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546769746] [2021-05-02 13:13:57,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-02 13:13:57,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:57,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-02 13:13:57,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 13:13:57,032 INFO L87 Difference]: Start difference. First operand 207 states and 214 transitions. Second operand has 85 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 84 states have internal predecessors, (177), 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 13:14:04,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:14:04,247 INFO L93 Difference]: Finished difference Result 250 states and 265 transitions. [2021-05-02 13:14:04,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 13:14:04,248 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 84 states have internal predecessors, (177), 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 13:14:04,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:14:04,249 INFO L225 Difference]: With dead ends: 250 [2021-05-02 13:14:04,249 INFO L226 Difference]: Without dead ends: 209 [2021-05-02 13:14:04,251 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3557 ImplicationChecksByTransitivity, 9867.8ms TimeCoverageRelationStatistics Valid=10293, Invalid=17097, Unknown=0, NotChecked=0, Total=27390 [2021-05-02 13:14:04,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-05-02 13:14:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-05-02 13:14:04,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0392156862745099) internal successors, (212), 204 states have internal predecessors, (212), 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 13:14:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 216 transitions. [2021-05-02 13:14:04,271 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 216 transitions. Word has length 206 [2021-05-02 13:14:04,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:14:04,271 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 216 transitions. [2021-05-02 13:14:04,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 84 states have internal predecessors, (177), 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 13:14:04,271 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 216 transitions. [2021-05-02 13:14:04,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-05-02 13:14:04,272 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:14:04,272 INFO L523 BasicCegarLoop]: trace histogram [87, 81, 22, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:14:04,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:14:04,472 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:14:04,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:14:04,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1468313176, now seen corresponding path program 80 times [2021-05-02 13:14:04,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:14:04,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765851385] [2021-05-02 13:14:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:14:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:08,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:14:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:08,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7822 backedges. 902 proven. 6642 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-05-02 13:14:08,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:14:08,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765851385] [2021-05-02 13:14:08,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765851385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:08,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219663748] [2021-05-02 13:14:08,484 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:14:08,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:14:08,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:14:08,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 83 conjunts are in the unsatisfiable core [2021-05-02 13:14:08,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:14:08,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:08,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7822 backedges. 902 proven. 6642 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-05-02 13:14:09,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219663748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:09,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:14:09,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84] total 86 [2021-05-02 13:14:09,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337493402] [2021-05-02 13:14:09,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 13:14:09,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:14:09,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 13:14:09,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 13:14:09,114 INFO L87 Difference]: Start difference. First operand 209 states and 216 transitions. Second operand has 86 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 85 states have internal predecessors, (179), 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 13:14:15,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:14:15,990 INFO L93 Difference]: Finished difference Result 252 states and 267 transitions. [2021-05-02 13:14:15,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-02 13:14:15,991 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 85 states have internal predecessors, (179), 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 208 [2021-05-02 13:14:15,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:14:15,992 INFO L225 Difference]: With dead ends: 252 [2021-05-02 13:14:15,992 INFO L226 Difference]: Without dead ends: 211 [2021-05-02 13:14:15,994 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3642 ImplicationChecksByTransitivity, 10252.5ms TimeCoverageRelationStatistics Valid=10543, Invalid=17513, Unknown=0, NotChecked=0, Total=28056 [2021-05-02 13:14:15,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-02 13:14:16,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2021-05-02 13:14:16,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0388349514563107) internal successors, (214), 206 states have internal predecessors, (214), 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 13:14:16,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 218 transitions. [2021-05-02 13:14:16,014 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 218 transitions. Word has length 208 [2021-05-02 13:14:16,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:14:16,015 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 218 transitions. [2021-05-02 13:14:16,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 85 states have internal predecessors, (179), 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 13:14:16,015 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 218 transitions. [2021-05-02 13:14:16,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 13:14:16,016 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:14:16,016 INFO L523 BasicCegarLoop]: trace histogram [88, 82, 22, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:14:16,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:14:16,216 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:14:16,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:14:16,217 INFO L82 PathProgramCache]: Analyzing trace with hash -745753813, now seen corresponding path program 81 times [2021-05-02 13:14:16,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:14:16,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711579625] [2021-05-02 13:14:16,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:14:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:20,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:14:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 913 proven. 6806 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-05-02 13:14:20,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:14:20,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711579625] [2021-05-02 13:14:20,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711579625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:20,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194127473] [2021-05-02 13:14:20,008 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:14:20,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-02 13:14:20,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:14:20,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 13:14:20,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:14:20,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:20,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:21,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:22,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:22,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 938 proven. 253 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2021-05-02 13:14:22,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194127473] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:22,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:14:22,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 28] total 112 [2021-05-02 13:14:22,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214557754] [2021-05-02 13:14:22,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2021-05-02 13:14:22,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:14:22,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-05-02 13:14:22,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3949, Invalid=8483, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 13:14:22,135 INFO L87 Difference]: Start difference. First operand 211 states and 218 transitions. Second operand has 112 states, 112 states have (on average 1.9285714285714286) internal successors, (216), 111 states have internal predecessors, (216), 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 13:14:35,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:14:35,653 INFO L93 Difference]: Finished difference Result 297 states and 334 transitions. [2021-05-02 13:14:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-02 13:14:35,654 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.9285714285714286) internal successors, (216), 111 states have internal predecessors, (216), 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 210 [2021-05-02 13:14:35,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:14:35,656 INFO L225 Difference]: With dead ends: 297 [2021-05-02 13:14:35,656 INFO L226 Difference]: Without dead ends: 256 [2021-05-02 13:14:35,658 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8965 ImplicationChecksByTransitivity, 17419.7ms TimeCoverageRelationStatistics Valid=15161, Invalid=33459, Unknown=0, NotChecked=0, Total=48620 [2021-05-02 13:14:35,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-02 13:14:35,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 214. [2021-05-02 13:14:35,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.0382775119617225) internal successors, (217), 209 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 13:14:35,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 221 transitions. [2021-05-02 13:14:35,680 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 221 transitions. Word has length 210 [2021-05-02 13:14:35,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:14:35,680 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 221 transitions. [2021-05-02 13:14:35,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 112 states, 112 states have (on average 1.9285714285714286) internal successors, (216), 111 states have internal predecessors, (216), 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 13:14:35,680 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 221 transitions. [2021-05-02 13:14:35,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-05-02 13:14:35,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:14:35,681 INFO L523 BasicCegarLoop]: trace histogram [89, 83, 23, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:14:35,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:14:35,894 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:14:35,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:14:35,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2076868917, now seen corresponding path program 82 times [2021-05-02 13:14:35,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:14:35,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2408049] [2021-05-02 13:14:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:14:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:39,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:14:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8197 backedges. 924 proven. 6972 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-05-02 13:14:39,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:14:39,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2408049] [2021-05-02 13:14:39,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2408049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:39,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354471752] [2021-05-02 13:14:39,973 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:14:40,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:14:40,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:14:40,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-02 13:14:40,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:14:40,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8197 backedges. 924 proven. 6972 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-05-02 13:14:40,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354471752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:40,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:14:40,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86] total 88 [2021-05-02 13:14:40,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528813510] [2021-05-02 13:14:40,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 13:14:40,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:14:40,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 13:14:40,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 13:14:40,644 INFO L87 Difference]: Start difference. First operand 214 states and 221 transitions. Second operand has 88 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 87 states have internal predecessors, (183), 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 13:14:49,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:14:49,606 INFO L93 Difference]: Finished difference Result 258 states and 273 transitions. [2021-05-02 13:14:49,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-02 13:14:49,608 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 87 states have internal predecessors, (183), 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 213 [2021-05-02 13:14:49,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:14:49,609 INFO L225 Difference]: With dead ends: 258 [2021-05-02 13:14:49,609 INFO L226 Difference]: Without dead ends: 216 [2021-05-02 13:14:49,611 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 12211.0ms TimeCoverageRelationStatistics Valid=11052, Invalid=18360, Unknown=0, NotChecked=0, Total=29412 [2021-05-02 13:14:49,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-02 13:14:49,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-05-02 13:14:49,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.037914691943128) internal successors, (219), 211 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 13:14:49,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 223 transitions. [2021-05-02 13:14:49,633 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 223 transitions. Word has length 213 [2021-05-02 13:14:49,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:14:49,633 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 223 transitions. [2021-05-02 13:14:49,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 87 states have internal predecessors, (183), 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 13:14:49,633 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 223 transitions. [2021-05-02 13:14:49,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-05-02 13:14:49,634 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:14:49,634 INFO L523 BasicCegarLoop]: trace histogram [90, 84, 23, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:14:49,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:14:49,849 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:14:49,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:14:49,849 INFO L82 PathProgramCache]: Analyzing trace with hash -117925486, now seen corresponding path program 83 times [2021-05-02 13:14:49,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:14:49,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160192943] [2021-05-02 13:14:49,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:14:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:54,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:14:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8376 backedges. 935 proven. 7140 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-05-02 13:14:54,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:14:54,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160192943] [2021-05-02 13:14:54,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160192943] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:54,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472826152] [2021-05-02 13:14:54,323 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:14:54,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2021-05-02 13:14:54,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:14:54,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 86 conjunts are in the unsatisfiable core [2021-05-02 13:14:54,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:14:54,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:54,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8376 backedges. 935 proven. 7140 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-05-02 13:14:55,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472826152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:55,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:14:55,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87] total 89 [2021-05-02 13:14:55,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91471628] [2021-05-02 13:14:55,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-02 13:14:55,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:14:55,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-02 13:14:55,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 13:14:55,049 INFO L87 Difference]: Start difference. First operand 216 states and 223 transitions. Second operand has 89 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 88 states have internal predecessors, (185), 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 13:15:03,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:03,547 INFO L93 Difference]: Finished difference Result 260 states and 275 transitions. [2021-05-02 13:15:03,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-02 13:15:03,548 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 88 states have internal predecessors, (185), 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 215 [2021-05-02 13:15:03,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:03,548 INFO L225 Difference]: With dead ends: 260 [2021-05-02 13:15:03,548 INFO L226 Difference]: Without dead ends: 218 [2021-05-02 13:15:03,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3903 ImplicationChecksByTransitivity, 12103.0ms TimeCoverageRelationStatistics Valid=11311, Invalid=18791, Unknown=0, NotChecked=0, Total=30102 [2021-05-02 13:15:03,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-02 13:15:03,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-05-02 13:15:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.0375586854460095) internal successors, (221), 213 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 13:15:03,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 225 transitions. [2021-05-02 13:15:03,572 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 225 transitions. Word has length 215 [2021-05-02 13:15:03,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:03,572 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 225 transitions. [2021-05-02 13:15:03,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 88 states have internal predecessors, (185), 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 13:15:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 225 transitions. [2021-05-02 13:15:03,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-05-02 13:15:03,573 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:03,573 INFO L523 BasicCegarLoop]: trace histogram [91, 85, 23, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:03,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-02 13:15:03,774 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:03,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:03,774 INFO L82 PathProgramCache]: Analyzing trace with hash -486404433, now seen corresponding path program 84 times [2021-05-02 13:15:03,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:03,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927186076] [2021-05-02 13:15:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:09,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8557 backedges. 946 proven. 7310 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-05-02 13:15:09,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:09,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927186076] [2021-05-02 13:15:09,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927186076] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:09,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419634715] [2021-05-02 13:15:09,527 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:09,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-02 13:15:09,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:09,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 13:15:09,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:10,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:12,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:12,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:12,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:12,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8557 backedges. 971 proven. 276 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2021-05-02 13:15:12,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419634715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:12,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:12,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 29] total 116 [2021-05-02 13:15:12,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950433331] [2021-05-02 13:15:12,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2021-05-02 13:15:12,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:12,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-05-02 13:15:12,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4235, Invalid=9105, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 13:15:12,257 INFO L87 Difference]: Start difference. First operand 218 states and 225 transitions. Second operand has 116 states, 116 states have (on average 1.9224137931034482) internal successors, (223), 115 states have internal predecessors, (223), 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 13:15:28,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:28,662 INFO L93 Difference]: Finished difference Result 305 states and 342 transitions. [2021-05-02 13:15:28,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-05-02 13:15:28,664 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.9224137931034482) internal successors, (223), 115 states have internal predecessors, (223), 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 217 [2021-05-02 13:15:28,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:28,665 INFO L225 Difference]: With dead ends: 305 [2021-05-02 13:15:28,665 INFO L226 Difference]: Without dead ends: 263 [2021-05-02 13:15:28,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9612 ImplicationChecksByTransitivity, 22357.2ms TimeCoverageRelationStatistics Valid=16311, Invalid=35901, Unknown=0, NotChecked=0, Total=52212 [2021-05-02 13:15:28,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-05-02 13:15:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 221. [2021-05-02 13:15:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.037037037037037) internal successors, (224), 216 states have internal predecessors, (224), 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 13:15:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 228 transitions. [2021-05-02 13:15:28,718 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 228 transitions. Word has length 217 [2021-05-02 13:15:28,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:28,718 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 228 transitions. [2021-05-02 13:15:28,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 116 states, 116 states have (on average 1.9224137931034482) internal successors, (223), 115 states have internal predecessors, (223), 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 13:15:28,718 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 228 transitions. [2021-05-02 13:15:28,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-05-02 13:15:28,719 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:28,719 INFO L523 BasicCegarLoop]: trace histogram [92, 86, 24, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:28,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:28,920 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:28,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:28,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1577999273, now seen corresponding path program 85 times [2021-05-02 13:15:28,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:28,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658438355] [2021-05-02 13:15:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:34,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8764 backedges. 957 proven. 7482 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 13:15:34,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:34,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658438355] [2021-05-02 13:15:34,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658438355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:34,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141925686] [2021-05-02 13:15:34,789 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:34,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 88 conjunts are in the unsatisfiable core [2021-05-02 13:15:34,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:34,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8764 backedges. 957 proven. 7482 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 13:15:35,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141925686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:35,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:35,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89] total 91 [2021-05-02 13:15:35,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701631444] [2021-05-02 13:15:35,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 13:15:35,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:35,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 13:15:35,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 13:15:35,578 INFO L87 Difference]: Start difference. First operand 221 states and 228 transitions. Second operand has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 90 states have internal predecessors, (189), 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 13:15:44,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:44,905 INFO L93 Difference]: Finished difference Result 266 states and 281 transitions. [2021-05-02 13:15:44,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 13:15:44,906 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 90 states have internal predecessors, (189), 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 220 [2021-05-02 13:15:44,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:44,907 INFO L225 Difference]: With dead ends: 266 [2021-05-02 13:15:44,907 INFO L226 Difference]: Without dead ends: 223 [2021-05-02 13:15:44,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 14575.9ms TimeCoverageRelationStatistics Valid=11838, Invalid=19668, Unknown=0, NotChecked=0, Total=31506 [2021-05-02 13:15:44,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-05-02 13:15:44,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-05-02 13:15:44,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.036697247706422) internal successors, (226), 218 states have internal predecessors, (226), 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 13:15:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 230 transitions. [2021-05-02 13:15:44,931 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 230 transitions. Word has length 220 [2021-05-02 13:15:44,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:44,932 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 230 transitions. [2021-05-02 13:15:44,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 90 states have internal predecessors, (189), 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 13:15:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 230 transitions. [2021-05-02 13:15:44,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-05-02 13:15:44,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:44,933 INFO L523 BasicCegarLoop]: trace histogram [93, 87, 24, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:45,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-02 13:15:45,133 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:45,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:45,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1845877082, now seen corresponding path program 86 times [2021-05-02 13:15:45,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:45,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393709942] [2021-05-02 13:15:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:50,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8949 backedges. 968 proven. 7656 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 13:15:50,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:50,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393709942] [2021-05-02 13:15:50,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393709942] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:50,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824143516] [2021-05-02 13:15:50,421 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:50,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:15:50,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:50,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 89 conjunts are in the unsatisfiable core [2021-05-02 13:15:50,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:50,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8949 backedges. 968 proven. 7656 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 13:15:51,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824143516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:51,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:51,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90] total 92 [2021-05-02 13:15:51,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025710843] [2021-05-02 13:15:51,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 13:15:51,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:51,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 13:15:51,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 13:15:51,279 INFO L87 Difference]: Start difference. First operand 223 states and 230 transitions. Second operand has 92 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 91 states have internal predecessors, (191), 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 13:16:00,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:00,260 INFO L93 Difference]: Finished difference Result 268 states and 283 transitions. [2021-05-02 13:16:00,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-02 13:16:00,261 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 91 states have internal predecessors, (191), 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 222 [2021-05-02 13:16:00,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:00,262 INFO L225 Difference]: With dead ends: 268 [2021-05-02 13:16:00,262 INFO L226 Difference]: Without dead ends: 225 [2021-05-02 13:16:00,263 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4173 ImplicationChecksByTransitivity, 13470.2ms TimeCoverageRelationStatistics Valid=12106, Invalid=20114, Unknown=0, NotChecked=0, Total=32220 [2021-05-02 13:16:00,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-02 13:16:00,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2021-05-02 13:16:00,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.0363636363636364) internal successors, (228), 220 states have internal predecessors, (228), 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 13:16:00,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 232 transitions. [2021-05-02 13:16:00,286 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 232 transitions. Word has length 222 [2021-05-02 13:16:00,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:00,286 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 232 transitions. [2021-05-02 13:16:00,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 91 states have internal predecessors, (191), 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 13:16:00,286 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 232 transitions. [2021-05-02 13:16:00,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-05-02 13:16:00,287 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:00,287 INFO L523 BasicCegarLoop]: trace histogram [94, 88, 24, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:00,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:00,488 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:00,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:00,488 INFO L82 PathProgramCache]: Analyzing trace with hash -2048861795, now seen corresponding path program 87 times [2021-05-02 13:16:00,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:00,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031067115] [2021-05-02 13:16:00,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:05,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9136 backedges. 979 proven. 7832 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 13:16:05,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:05,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031067115] [2021-05-02 13:16:05,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031067115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:05,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731366163] [2021-05-02 13:16:05,951 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:06,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-05-02 13:16:06,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:06,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 13:16:06,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:06,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:08,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:08,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:08,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:08,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:08,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:08,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:08,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:08,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:08,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:08,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:08,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:08,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9136 backedges. 1004 proven. 300 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2021-05-02 13:16:08,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731366163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:08,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:08,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 30] total 120 [2021-05-02 13:16:08,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227678559] [2021-05-02 13:16:08,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2021-05-02 13:16:08,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:08,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-05-02 13:16:08,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4531, Invalid=9749, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 13:16:08,525 INFO L87 Difference]: Start difference. First operand 225 states and 232 transitions. Second operand has 120 states, 120 states have (on average 1.9166666666666667) internal successors, (230), 119 states have internal predecessors, (230), 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 13:16:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:22,602 INFO L93 Difference]: Finished difference Result 313 states and 350 transitions. [2021-05-02 13:16:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-05-02 13:16:22,603 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.9166666666666667) internal successors, (230), 119 states have internal predecessors, (230), 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 224 [2021-05-02 13:16:22,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:22,604 INFO L225 Difference]: With dead ends: 313 [2021-05-02 13:16:22,604 INFO L226 Difference]: Without dead ends: 270 [2021-05-02 13:16:22,606 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10281 ImplicationChecksByTransitivity, 20080.4ms TimeCoverageRelationStatistics Valid=17503, Invalid=38429, Unknown=0, NotChecked=0, Total=55932 [2021-05-02 13:16:22,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-05-02 13:16:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 228. [2021-05-02 13:16:22,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.0358744394618835) internal successors, (231), 223 states have internal predecessors, (231), 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 13:16:22,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 235 transitions. [2021-05-02 13:16:22,629 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 235 transitions. Word has length 224 [2021-05-02 13:16:22,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:22,629 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 235 transitions. [2021-05-02 13:16:22,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 120 states, 120 states have (on average 1.9166666666666667) internal successors, (230), 119 states have internal predecessors, (230), 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 13:16:22,629 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 235 transitions. [2021-05-02 13:16:22,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-05-02 13:16:22,630 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:22,630 INFO L523 BasicCegarLoop]: trace histogram [95, 89, 25, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:22,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:22,841 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:22,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:22,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1320948291, now seen corresponding path program 88 times [2021-05-02 13:16:22,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:22,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499780598] [2021-05-02 13:16:22,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:28,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9350 backedges. 990 proven. 8010 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-05-02 13:16:28,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:28,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499780598] [2021-05-02 13:16:28,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499780598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:28,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911795682] [2021-05-02 13:16:28,089 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:28,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:16:28,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:28,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 91 conjunts are in the unsatisfiable core [2021-05-02 13:16:28,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:28,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9350 backedges. 990 proven. 8010 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-05-02 13:16:28,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911795682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:28,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:28,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92] total 94 [2021-05-02 13:16:28,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586836948] [2021-05-02 13:16:28,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 13:16:28,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:28,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 13:16:28,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 13:16:28,863 INFO L87 Difference]: Start difference. First operand 228 states and 235 transitions. Second operand has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 93 states have internal predecessors, (195), 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 13:16:37,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:37,710 INFO L93 Difference]: Finished difference Result 274 states and 289 transitions. [2021-05-02 13:16:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-02 13:16:37,712 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 93 states have internal predecessors, (195), 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 13:16:37,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:37,712 INFO L225 Difference]: With dead ends: 274 [2021-05-02 13:16:37,712 INFO L226 Difference]: Without dead ends: 230 [2021-05-02 13:16:37,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4358 ImplicationChecksByTransitivity, 13372.5ms TimeCoverageRelationStatistics Valid=12651, Invalid=21021, Unknown=0, NotChecked=0, Total=33672 [2021-05-02 13:16:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-02 13:16:37,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2021-05-02 13:16:37,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.0355555555555556) internal successors, (233), 225 states have internal predecessors, (233), 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 13:16:37,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 237 transitions. [2021-05-02 13:16:37,737 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 237 transitions. Word has length 227 [2021-05-02 13:16:37,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:37,737 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 237 transitions. [2021-05-02 13:16:37,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 93 states have internal predecessors, (195), 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 13:16:37,737 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 237 transitions. [2021-05-02 13:16:37,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-05-02 13:16:37,738 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:37,738 INFO L523 BasicCegarLoop]: trace histogram [96, 90, 25, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:37,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:37,939 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:37,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:37,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1511375840, now seen corresponding path program 89 times [2021-05-02 13:16:37,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:37,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045229609] [2021-05-02 13:16:37,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:43,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9541 backedges. 1001 proven. 8190 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-05-02 13:16:43,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:43,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045229609] [2021-05-02 13:16:43,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045229609] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:43,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500872786] [2021-05-02 13:16:43,459 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:43,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2021-05-02 13:16:43,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:43,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 92 conjunts are in the unsatisfiable core [2021-05-02 13:16:43,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:43,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9541 backedges. 1001 proven. 8190 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-05-02 13:16:44,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500872786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:44,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:44,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93] total 95 [2021-05-02 13:16:44,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035006186] [2021-05-02 13:16:44,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-02 13:16:44,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:44,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-02 13:16:44,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 13:16:44,322 INFO L87 Difference]: Start difference. First operand 230 states and 237 transitions. Second operand has 95 states, 95 states have (on average 2.0736842105263156) internal successors, (197), 94 states have internal predecessors, (197), 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 13:16:53,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:53,785 INFO L93 Difference]: Finished difference Result 276 states and 291 transitions. [2021-05-02 13:16:53,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-02 13:16:53,786 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0736842105263156) internal successors, (197), 94 states have internal predecessors, (197), 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 229 [2021-05-02 13:16:53,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:53,787 INFO L225 Difference]: With dead ends: 276 [2021-05-02 13:16:53,787 INFO L226 Difference]: Without dead ends: 232 [2021-05-02 13:16:53,788 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4452 ImplicationChecksByTransitivity, 14209.0ms TimeCoverageRelationStatistics Valid=12928, Invalid=21482, Unknown=0, NotChecked=0, Total=34410 [2021-05-02 13:16:53,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-02 13:16:53,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2021-05-02 13:16:53,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.0352422907488987) internal successors, (235), 227 states have internal predecessors, (235), 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 13:16:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 239 transitions. [2021-05-02 13:16:53,812 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 239 transitions. Word has length 229 [2021-05-02 13:16:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:53,812 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 239 transitions. [2021-05-02 13:16:53,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 2.0736842105263156) internal successors, (197), 94 states have internal predecessors, (197), 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 13:16:53,813 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 239 transitions. [2021-05-02 13:16:53,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-05-02 13:16:53,813 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:53,813 INFO L523 BasicCegarLoop]: trace histogram [97, 91, 25, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:54,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:54,014 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:54,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:54,014 INFO L82 PathProgramCache]: Analyzing trace with hash -171343299, now seen corresponding path program 90 times [2021-05-02 13:16:54,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:54,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984225806] [2021-05-02 13:16:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:59,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9734 backedges. 1012 proven. 8372 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-05-02 13:16:59,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:59,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984225806] [2021-05-02 13:16:59,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984225806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:59,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611479010] [2021-05-02 13:16:59,285 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:59,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-05-02 13:16:59,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:59,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 13:16:59,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:59,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:00,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9734 backedges. 1037 proven. 325 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2021-05-02 13:17:01,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611479010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:01,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:01,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 31] total 124 [2021-05-02 13:17:01,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884655323] [2021-05-02 13:17:01,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 124 states [2021-05-02 13:17:01,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:01,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-05-02 13:17:01,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4837, Invalid=10415, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 13:17:01,960 INFO L87 Difference]: Start difference. First operand 232 states and 239 transitions. Second operand has 124 states, 124 states have (on average 1.9112903225806452) internal successors, (237), 123 states have internal predecessors, (237), 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 13:17:18,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:18,727 INFO L93 Difference]: Finished difference Result 321 states and 358 transitions. [2021-05-02 13:17:18,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-05-02 13:17:18,728 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.9112903225806452) internal successors, (237), 123 states have internal predecessors, (237), 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 231 [2021-05-02 13:17:18,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:18,729 INFO L225 Difference]: With dead ends: 321 [2021-05-02 13:17:18,729 INFO L226 Difference]: Without dead ends: 277 [2021-05-02 13:17:18,731 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10972 ImplicationChecksByTransitivity, 22277.2ms TimeCoverageRelationStatistics Valid=18737, Invalid=41043, Unknown=0, NotChecked=0, Total=59780 [2021-05-02 13:17:18,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-05-02 13:17:18,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 235. [2021-05-02 13:17:18,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.0347826086956522) internal successors, (238), 230 states have internal predecessors, (238), 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 13:17:18,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 242 transitions. [2021-05-02 13:17:18,756 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 242 transitions. Word has length 231 [2021-05-02 13:17:18,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:18,756 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 242 transitions. [2021-05-02 13:17:18,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 124 states, 124 states have (on average 1.9112903225806452) internal successors, (237), 123 states have internal predecessors, (237), 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 13:17:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 242 transitions. [2021-05-02 13:17:18,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-05-02 13:17:18,757 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:18,757 INFO L523 BasicCegarLoop]: trace histogram [98, 92, 26, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:18,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-05-02 13:17:18,957 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:18,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:18,957 INFO L82 PathProgramCache]: Analyzing trace with hash -8728247, now seen corresponding path program 91 times [2021-05-02 13:17:18,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:18,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589981944] [2021-05-02 13:17:18,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:24,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:17:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9955 backedges. 1023 proven. 8556 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-05-02 13:17:24,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:17:24,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589981944] [2021-05-02 13:17:24,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589981944] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:24,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589077308] [2021-05-02 13:17:24,785 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:24,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 94 conjunts are in the unsatisfiable core [2021-05-02 13:17:24,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:17:24,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9955 backedges. 1023 proven. 8556 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-05-02 13:17:25,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589077308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:25,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:25,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95] total 97 [2021-05-02 13:17:25,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184915503] [2021-05-02 13:17:25,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-02 13:17:25,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:25,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-02 13:17:25,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 13:17:25,698 INFO L87 Difference]: Start difference. First operand 235 states and 242 transitions. Second operand has 97 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 96 states have internal predecessors, (201), 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 13:17:36,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:36,168 INFO L93 Difference]: Finished difference Result 282 states and 297 transitions. [2021-05-02 13:17:36,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 13:17:36,170 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 96 states have internal predecessors, (201), 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 234 [2021-05-02 13:17:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:36,170 INFO L225 Difference]: With dead ends: 282 [2021-05-02 13:17:36,170 INFO L226 Difference]: Without dead ends: 237 [2021-05-02 13:17:36,172 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 15564.0ms TimeCoverageRelationStatistics Valid=13491, Invalid=22419, Unknown=0, NotChecked=0, Total=35910 [2021-05-02 13:17:36,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-02 13:17:36,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2021-05-02 13:17:36,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.0344827586206897) internal successors, (240), 232 states have internal predecessors, (240), 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 13:17:36,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 244 transitions. [2021-05-02 13:17:36,197 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 244 transitions. Word has length 234 [2021-05-02 13:17:36,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:36,197 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 244 transitions. [2021-05-02 13:17:36,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 96 states have internal predecessors, (201), 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 13:17:36,197 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 244 transitions. [2021-05-02 13:17:36,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-05-02 13:17:36,198 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:36,198 INFO L523 BasicCegarLoop]: trace histogram [99, 93, 26, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:36,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:36,399 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:36,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:36,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1826585332, now seen corresponding path program 92 times [2021-05-02 13:17:36,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:36,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124795755] [2021-05-02 13:17:36,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:42,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:17:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 1034 proven. 8742 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-05-02 13:17:42,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:17:42,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124795755] [2021-05-02 13:17:42,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124795755] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:42,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368437814] [2021-05-02 13:17:42,922 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:43,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:17:43,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:17:43,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-02 13:17:43,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:17:43,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 1034 proven. 8742 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-05-02 13:17:43,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368437814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:43,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:43,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96] total 98 [2021-05-02 13:17:43,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732442880] [2021-05-02 13:17:43,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 13:17:43,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:43,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 13:17:43,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 13:17:43,841 INFO L87 Difference]: Start difference. First operand 237 states and 244 transitions. Second operand has 98 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 97 states have internal predecessors, (203), 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 13:17:54,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:54,102 INFO L93 Difference]: Finished difference Result 284 states and 299 transitions. [2021-05-02 13:17:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-02 13:17:54,103 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 97 states have internal predecessors, (203), 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 236 [2021-05-02 13:17:54,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:54,104 INFO L225 Difference]: With dead ends: 284 [2021-05-02 13:17:54,104 INFO L226 Difference]: Without dead ends: 239 [2021-05-02 13:17:54,106 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4740 ImplicationChecksByTransitivity, 15963.2ms TimeCoverageRelationStatistics Valid=13777, Invalid=22895, Unknown=0, NotChecked=0, Total=36672 [2021-05-02 13:17:54,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-02 13:17:54,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-05-02 13:17:54,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.0341880341880343) internal successors, (242), 234 states have internal predecessors, (242), 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 13:17:54,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 246 transitions. [2021-05-02 13:17:54,131 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 246 transitions. Word has length 236 [2021-05-02 13:17:54,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:54,131 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 246 transitions. [2021-05-02 13:17:54,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 97 states have internal predecessors, (203), 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 13:17:54,132 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 246 transitions. [2021-05-02 13:17:54,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-05-02 13:17:54,132 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:54,132 INFO L523 BasicCegarLoop]: trace histogram [100, 94, 26, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:54,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-05-02 13:17:54,333 INFO L428 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:54,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:54,333 INFO L82 PathProgramCache]: Analyzing trace with hash -735554545, now seen corresponding path program 93 times [2021-05-02 13:17:54,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:54,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715214692] [2021-05-02 13:17:54,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:01,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:18:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10351 backedges. 1045 proven. 8930 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-05-02 13:18:01,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:18:01,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715214692] [2021-05-02 13:18:01,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715214692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:01,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140402354] [2021-05-02 13:18:01,182 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:01,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-05-02 13:18:01,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:18:01,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 13:18:01,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:18:01,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:02,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:02,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:02,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:02,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:02,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:02,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:02,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:02,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:02,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:02,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10351 backedges. 1222 proven. 36 refuted. 0 times theorem prover too weak. 9093 trivial. 0 not checked. [2021-05-02 13:18:02,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140402354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:02,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:18:02,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 9] total 105 [2021-05-02 13:18:02,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499294515] [2021-05-02 13:18:02,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2021-05-02 13:18:02,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:18:02,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-05-02 13:18:02,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 13:18:02,897 INFO L87 Difference]: Start difference. First operand 239 states and 246 transitions. Second operand has 105 states, 105 states have (on average 2.085714285714286) internal successors, (219), 104 states have internal predecessors, (219), 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 13:18:16,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:18:16,029 INFO L93 Difference]: Finished difference Result 289 states and 307 transitions. [2021-05-02 13:18:16,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-02 13:18:16,031 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.085714285714286) internal successors, (219), 104 states have internal predecessors, (219), 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 238 [2021-05-02 13:18:16,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:18:16,031 INFO L225 Difference]: With dead ends: 289 [2021-05-02 13:18:16,031 INFO L226 Difference]: Without dead ends: 244 [2021-05-02 13:18:16,033 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5245 ImplicationChecksByTransitivity, 19988.5ms TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2021-05-02 13:18:16,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-02 13:18:16,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2021-05-02 13:18:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.0378151260504203) internal successors, (247), 238 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 13:18:16,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 251 transitions. [2021-05-02 13:18:16,060 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 251 transitions. Word has length 238 [2021-05-02 13:18:16,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:18:16,060 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 251 transitions. [2021-05-02 13:18:16,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 105 states, 105 states have (on average 2.085714285714286) internal successors, (219), 104 states have internal predecessors, (219), 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 13:18:16,061 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 251 transitions. [2021-05-02 13:18:16,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-05-02 13:18:16,061 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:18:16,061 INFO L523 BasicCegarLoop]: trace histogram [102, 95, 26, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:18:16,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:16,262 INFO L428 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:18:16,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:18:16,262 INFO L82 PathProgramCache]: Analyzing trace with hash -227768105, now seen corresponding path program 94 times [2021-05-02 13:18:16,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:18:16,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056717259] [2021-05-02 13:18:16,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:18:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:22,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:18:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10755 backedges. 1248 proven. 9120 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-05-02 13:18:22,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:18:22,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056717259] [2021-05-02 13:18:22,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056717259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:22,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433977238] [2021-05-02 13:18:22,991 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:23,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:18:23,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:18:23,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 97 conjunts are in the unsatisfiable core [2021-05-02 13:18:23,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:18:23,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:23,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10755 backedges. 1248 proven. 9120 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-05-02 13:18:24,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433977238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:24,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:18:24,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98] total 100 [2021-05-02 13:18:24,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064407237] [2021-05-02 13:18:24,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 13:18:24,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:18:24,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 13:18:24,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 13:18:24,041 INFO L87 Difference]: Start difference. First operand 243 states and 251 transitions. Second operand has 100 states, 100 states have (on average 2.07) internal successors, (207), 99 states have internal predecessors, (207), 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 13:18:36,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:18:36,405 INFO L93 Difference]: Finished difference Result 292 states and 309 transitions. [2021-05-02 13:18:36,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-02 13:18:36,406 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.07) internal successors, (207), 99 states have internal predecessors, (207), 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 242 [2021-05-02 13:18:36,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:18:36,407 INFO L225 Difference]: With dead ends: 292 [2021-05-02 13:18:36,407 INFO L226 Difference]: Without dead ends: 245 [2021-05-02 13:18:36,409 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4937 ImplicationChecksByTransitivity, 18202.3ms TimeCoverageRelationStatistics Valid=14358, Invalid=23862, Unknown=0, NotChecked=0, Total=38220 [2021-05-02 13:18:36,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-02 13:18:36,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2021-05-02 13:18:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0375) internal successors, (249), 240 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 13:18:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 253 transitions. [2021-05-02 13:18:36,436 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 253 transitions. Word has length 242 [2021-05-02 13:18:36,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:18:36,436 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 253 transitions. [2021-05-02 13:18:36,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 2.07) internal successors, (207), 99 states have internal predecessors, (207), 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 13:18:36,436 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 253 transitions. [2021-05-02 13:18:36,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-05-02 13:18:36,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:18:36,437 INFO L523 BasicCegarLoop]: trace histogram [103, 96, 26, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:18:36,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:36,640 INFO L428 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:18:36,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:18:36,640 INFO L82 PathProgramCache]: Analyzing trace with hash -623916646, now seen corresponding path program 95 times [2021-05-02 13:18:36,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:18:36,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624499720] [2021-05-02 13:18:36,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:18:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:44,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:18:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10960 backedges. 1261 proven. 9312 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-05-02 13:18:44,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:18:44,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624499720] [2021-05-02 13:18:44,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624499720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:44,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708744076] [2021-05-02 13:18:44,605 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:44,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 104 check-sat command(s) [2021-05-02 13:18:44,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:18:44,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 98 conjunts are in the unsatisfiable core [2021-05-02 13:18:44,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:18:44,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:44,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10960 backedges. 1261 proven. 9312 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-05-02 13:18:45,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708744076] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:45,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:18:45,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99] total 101 [2021-05-02 13:18:45,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006882304] [2021-05-02 13:18:45,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-02 13:18:45,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:18:45,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-02 13:18:45,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 13:18:45,744 INFO L87 Difference]: Start difference. First operand 245 states and 253 transitions. Second operand has 101 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 100 states have internal predecessors, (209), 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 13:18:58,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:18:58,293 INFO L93 Difference]: Finished difference Result 294 states and 311 transitions. [2021-05-02 13:18:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-02 13:18:58,295 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 100 states have internal predecessors, (209), 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 244 [2021-05-02 13:18:58,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:18:58,296 INFO L225 Difference]: With dead ends: 294 [2021-05-02 13:18:58,296 INFO L226 Difference]: Without dead ends: 247 [2021-05-02 13:18:58,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5037 ImplicationChecksByTransitivity, 19669.8ms TimeCoverageRelationStatistics Valid=14653, Invalid=24353, Unknown=0, NotChecked=0, Total=39006 [2021-05-02 13:18:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-02 13:18:58,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2021-05-02 13:18:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.037190082644628) internal successors, (251), 242 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 13:18:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 255 transitions. [2021-05-02 13:18:58,333 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 255 transitions. Word has length 244 [2021-05-02 13:18:58,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:18:58,333 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 255 transitions. [2021-05-02 13:18:58,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 101 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 100 states have internal predecessors, (209), 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 13:18:58,333 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 255 transitions. [2021-05-02 13:18:58,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-05-02 13:18:58,334 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:18:58,334 INFO L523 BasicCegarLoop]: trace histogram [104, 97, 26, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:18:58,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-02 13:18:58,549 INFO L428 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:18:58,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:18:58,549 INFO L82 PathProgramCache]: Analyzing trace with hash 929424797, now seen corresponding path program 96 times [2021-05-02 13:18:58,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:18:58,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941747670] [2021-05-02 13:18:58,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:18:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:06,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:19:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11167 backedges. 1274 proven. 9506 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-05-02 13:19:06,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:19:06,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941747670] [2021-05-02 13:19:06,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941747670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:06,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700995025] [2021-05-02 13:19:06,752 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:19:06,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-05-02 13:19:06,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:19:06,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 13:19:06,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:19:07,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:07,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:07,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:07,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:07,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:07,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:07,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:07,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:08,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:09,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:09,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:09,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:09,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:09,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:09,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:09,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:09,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:09,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:09,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:09,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:09,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:09,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:09,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:09,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:09,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:09,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:09,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:10,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:10,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:10,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:10,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:10,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:10,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:10,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:10,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:10,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:10,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:10,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:10,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:10,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:10,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11167 backedges. 1310 proven. 351 refuted. 0 times theorem prover too weak. 9506 trivial. 0 not checked. [2021-05-02 13:19:10,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700995025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:10,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:19:10,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 33] total 132 [2021-05-02 13:19:10,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645932044] [2021-05-02 13:19:10,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2021-05-02 13:19:10,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:19:10,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-05-02 13:19:10,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5479, Invalid=11813, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 13:19:10,942 INFO L87 Difference]: Start difference. First operand 247 states and 255 transitions. Second operand has 132 states, 132 states have (on average 1.9090909090909092) internal successors, (252), 131 states have internal predecessors, (252), 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 13:19:28,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:19:28,999 INFO L93 Difference]: Finished difference Result 353 states and 399 transitions. [2021-05-02 13:19:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-05-02 13:19:29,000 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.9090909090909092) internal successors, (252), 131 states have internal predecessors, (252), 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 246 [2021-05-02 13:19:29,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:19:29,001 INFO L225 Difference]: With dead ends: 353 [2021-05-02 13:19:29,001 INFO L226 Difference]: Without dead ends: 306 [2021-05-02 13:19:29,003 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12585 ImplicationChecksByTransitivity, 27803.5ms TimeCoverageRelationStatistics Valid=21135, Invalid=46725, Unknown=0, NotChecked=0, Total=67860 [2021-05-02 13:19:29,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-02 13:19:29,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 250. [2021-05-02 13:19:29,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.036734693877551) internal successors, (254), 245 states have internal predecessors, (254), 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 13:19:29,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 258 transitions. [2021-05-02 13:19:29,034 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 258 transitions. Word has length 246 [2021-05-02 13:19:29,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:19:29,035 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 258 transitions. [2021-05-02 13:19:29,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 132 states, 132 states have (on average 1.9090909090909092) internal successors, (252), 131 states have internal predecessors, (252), 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 13:19:29,035 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 258 transitions. [2021-05-02 13:19:29,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-05-02 13:19:29,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:19:29,035 INFO L523 BasicCegarLoop]: trace histogram [105, 98, 27, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:19:29,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-02 13:19:29,241 INFO L428 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:19:29,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:19:29,241 INFO L82 PathProgramCache]: Analyzing trace with hash 400216707, now seen corresponding path program 97 times [2021-05-02 13:19:29,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:19:29,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310292731] [2021-05-02 13:19:29,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:19:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:34,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:19:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11403 backedges. 1287 proven. 9702 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-05-02 13:19:34,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:19:34,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310292731] [2021-05-02 13:19:34,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310292731] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:34,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803375932] [2021-05-02 13:19:34,317 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:19:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:34,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 100 conjunts are in the unsatisfiable core [2021-05-02 13:19:34,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:19:34,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:34,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:35,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:35,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:35,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:35,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11403 backedges. 1287 proven. 9702 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-05-02 13:19:35,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803375932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:35,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:19:35,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101] total 103 [2021-05-02 13:19:35,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342380083] [2021-05-02 13:19:35,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-05-02 13:19:35,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:19:35,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-05-02 13:19:35,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 13:19:35,092 INFO L87 Difference]: Start difference. First operand 250 states and 258 transitions. Second operand has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 102 states have internal predecessors, (213), 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 13:19:43,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:19:43,546 INFO L93 Difference]: Finished difference Result 300 states and 317 transitions. [2021-05-02 13:19:43,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-02 13:19:43,546 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 102 states have internal predecessors, (213), 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 13:19:43,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:19:43,547 INFO L225 Difference]: With dead ends: 300 [2021-05-02 13:19:43,547 INFO L226 Difference]: Without dead ends: 252 [2021-05-02 13:19:43,549 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5240 ImplicationChecksByTransitivity, 13015.2ms TimeCoverageRelationStatistics Valid=15252, Invalid=25350, Unknown=0, NotChecked=0, Total=40602 [2021-05-02 13:19:43,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-02 13:19:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2021-05-02 13:19:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.0364372469635628) internal successors, (256), 247 states have internal predecessors, (256), 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 13:19:43,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 260 transitions. [2021-05-02 13:19:43,577 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 260 transitions. Word has length 249 [2021-05-02 13:19:43,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:19:43,577 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 260 transitions. [2021-05-02 13:19:43,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 102 states have internal predecessors, (213), 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 13:19:43,578 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 260 transitions. [2021-05-02 13:19:43,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-05-02 13:19:43,578 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:19:43,578 INFO L523 BasicCegarLoop]: trace histogram [106, 99, 27, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:19:43,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:19:43,785 INFO L428 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:19:43,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:19:43,785 INFO L82 PathProgramCache]: Analyzing trace with hash -170606496, now seen corresponding path program 98 times [2021-05-02 13:19:43,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:19:43,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351156427] [2021-05-02 13:19:43,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:19:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:49,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:19:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11614 backedges. 1300 proven. 9900 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-05-02 13:19:49,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:19:49,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351156427] [2021-05-02 13:19:49,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351156427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:49,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826892221] [2021-05-02 13:19:49,093 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:19:49,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:19:49,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:19:49,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 101 conjunts are in the unsatisfiable core [2021-05-02 13:19:49,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:19:49,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11614 backedges. 1300 proven. 9900 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-05-02 13:19:49,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826892221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:49,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:19:49,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102] total 104 [2021-05-02 13:19:49,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032616544] [2021-05-02 13:19:49,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-02 13:19:49,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:19:49,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-02 13:19:49,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 13:19:49,960 INFO L87 Difference]: Start difference. First operand 252 states and 260 transitions. Second operand has 104 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 103 states have internal predecessors, (215), 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 13:19:58,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:19:58,775 INFO L93 Difference]: Finished difference Result 302 states and 319 transitions. [2021-05-02 13:19:58,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-02 13:19:58,776 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 103 states have internal predecessors, (215), 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 13:19:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:19:58,777 INFO L225 Difference]: With dead ends: 302 [2021-05-02 13:19:58,777 INFO L226 Difference]: Without dead ends: 254 [2021-05-02 13:19:58,778 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5343 ImplicationChecksByTransitivity, 13490.8ms TimeCoverageRelationStatistics Valid=15556, Invalid=25856, Unknown=0, NotChecked=0, Total=41412 [2021-05-02 13:19:58,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-02 13:19:58,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-05-02 13:19:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.036144578313253) internal successors, (258), 249 states have internal predecessors, (258), 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 13:19:58,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 262 transitions. [2021-05-02 13:19:58,815 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 262 transitions. Word has length 251 [2021-05-02 13:19:58,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:19:58,815 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 262 transitions. [2021-05-02 13:19:58,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 104 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 103 states have internal predecessors, (215), 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 13:19:58,816 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 262 transitions. [2021-05-02 13:19:58,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-05-02 13:19:58,816 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:19:58,816 INFO L523 BasicCegarLoop]: trace histogram [107, 100, 27, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:19:59,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-02 13:19:59,017 INFO L428 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:19:59,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:19:59,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1024109309, now seen corresponding path program 99 times [2021-05-02 13:19:59,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:19:59,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656467046] [2021-05-02 13:19:59,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:19:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:04,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:20:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11827 backedges. 1313 proven. 10100 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-05-02 13:20:05,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:20:05,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656467046] [2021-05-02 13:20:05,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656467046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:05,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284158904] [2021-05-02 13:20:05,001 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:20:05,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-05-02 13:20:05,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:20:05,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 13:20:05,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:20:05,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:05,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:05,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:05,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:05,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:05,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:05,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:05,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:05,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:05,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:06,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11827 backedges. 1349 proven. 378 refuted. 0 times theorem prover too weak. 10100 trivial. 0 not checked. [2021-05-02 13:20:08,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284158904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:08,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:20:08,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 34] total 136 [2021-05-02 13:20:08,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394059166] [2021-05-02 13:20:08,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 136 states [2021-05-02 13:20:08,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:20:08,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-05-02 13:20:08,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5815, Invalid=12545, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 13:20:08,369 INFO L87 Difference]: Start difference. First operand 254 states and 262 transitions. Second operand has 136 states, 136 states have (on average 1.9044117647058822) internal successors, (259), 135 states have internal predecessors, (259), 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 13:20:24,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:20:24,614 INFO L93 Difference]: Finished difference Result 361 states and 407 transitions. [2021-05-02 13:20:24,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-05-02 13:20:24,615 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.9044117647058822) internal successors, (259), 135 states have internal predecessors, (259), 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 253 [2021-05-02 13:20:24,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:20:24,615 INFO L225 Difference]: With dead ends: 361 [2021-05-02 13:20:24,615 INFO L226 Difference]: Without dead ends: 313 [2021-05-02 13:20:24,617 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13349 ImplicationChecksByTransitivity, 22966.7ms TimeCoverageRelationStatistics Valid=22489, Invalid=49603, Unknown=0, NotChecked=0, Total=72092 [2021-05-02 13:20:24,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-05-02 13:20:24,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 257. [2021-05-02 13:20:24,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.0357142857142858) internal successors, (261), 252 states have internal predecessors, (261), 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 13:20:24,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 265 transitions. [2021-05-02 13:20:24,647 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 265 transitions. Word has length 253 [2021-05-02 13:20:24,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:20:24,647 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 265 transitions. [2021-05-02 13:20:24,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 136 states, 136 states have (on average 1.9044117647058822) internal successors, (259), 135 states have internal predecessors, (259), 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 13:20:24,647 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 265 transitions. [2021-05-02 13:20:24,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-05-02 13:20:24,648 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:20:24,648 INFO L523 BasicCegarLoop]: trace histogram [108, 101, 28, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:20:24,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-02 13:20:24,849 INFO L428 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:20:24,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:20:24,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1102720073, now seen corresponding path program 100 times [2021-05-02 13:20:24,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:20:24,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026891995] [2021-05-02 13:20:24,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:20:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:30,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:20:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12070 backedges. 1326 proven. 10302 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 13:20:30,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:20:30,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026891995] [2021-05-02 13:20:30,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026891995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:30,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036575522] [2021-05-02 13:20:30,511 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:20:30,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:20:30,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:20:30,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 103 conjunts are in the unsatisfiable core [2021-05-02 13:20:30,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:20:30,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:30,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12070 backedges. 1326 proven. 10302 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 13:20:31,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036575522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:31,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:20:31,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104] total 106 [2021-05-02 13:20:31,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991647458] [2021-05-02 13:20:31,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-02 13:20:31,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:20:31,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-02 13:20:31,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 13:20:31,349 INFO L87 Difference]: Start difference. First operand 257 states and 265 transitions. Second operand has 106 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 105 states have internal predecessors, (219), 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 13:20:42,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:20:42,303 INFO L93 Difference]: Finished difference Result 308 states and 325 transitions. [2021-05-02 13:20:42,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-02 13:20:42,305 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 105 states have internal predecessors, (219), 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 256 [2021-05-02 13:20:42,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:20:42,305 INFO L225 Difference]: With dead ends: 308 [2021-05-02 13:20:42,305 INFO L226 Difference]: Without dead ends: 259 [2021-05-02 13:20:42,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5552 ImplicationChecksByTransitivity, 15744.6ms TimeCoverageRelationStatistics Valid=16173, Invalid=26883, Unknown=0, NotChecked=0, Total=43056 [2021-05-02 13:20:42,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-05-02 13:20:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2021-05-02 13:20:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0354330708661417) internal successors, (263), 254 states have internal predecessors, (263), 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 13:20:42,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 267 transitions. [2021-05-02 13:20:42,337 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 267 transitions. Word has length 256 [2021-05-02 13:20:42,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:20:42,337 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 267 transitions. [2021-05-02 13:20:42,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 105 states have internal predecessors, (219), 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 13:20:42,338 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 267 transitions. [2021-05-02 13:20:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-05-02 13:20:42,338 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:20:42,338 INFO L523 BasicCegarLoop]: trace histogram [109, 102, 28, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:20:42,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-05-02 13:20:42,539 INFO L428 AbstractCegarLoop]: === Iteration 106 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:20:42,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:20:42,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1919984692, now seen corresponding path program 101 times [2021-05-02 13:20:42,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:20:42,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760667071] [2021-05-02 13:20:42,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:20:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:48,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:20:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12287 backedges. 1339 proven. 10506 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 13:20:48,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:20:48,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760667071] [2021-05-02 13:20:48,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760667071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:48,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186561677] [2021-05-02 13:20:48,692 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:20:48,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 110 check-sat command(s) [2021-05-02 13:20:48,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:20:48,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 104 conjunts are in the unsatisfiable core [2021-05-02 13:20:48,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:20:48,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:48,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:48,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:48,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:48,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:48,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12287 backedges. 1339 proven. 10506 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 13:20:49,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186561677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:49,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:20:49,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 105] total 107 [2021-05-02 13:20:49,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996740675] [2021-05-02 13:20:49,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 107 states [2021-05-02 13:20:49,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:20:49,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-05-02 13:20:49,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 13:20:49,723 INFO L87 Difference]: Start difference. First operand 259 states and 267 transitions. Second operand has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 106 states have internal predecessors, (221), 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 13:20:59,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:20:59,870 INFO L93 Difference]: Finished difference Result 310 states and 327 transitions. [2021-05-02 13:20:59,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-02 13:20:59,871 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 106 states have internal predecessors, (221), 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 258 [2021-05-02 13:20:59,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:20:59,872 INFO L225 Difference]: With dead ends: 310 [2021-05-02 13:20:59,872 INFO L226 Difference]: Without dead ends: 261 [2021-05-02 13:20:59,873 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5658 ImplicationChecksByTransitivity, 15458.4ms TimeCoverageRelationStatistics Valid=16486, Invalid=27404, Unknown=0, NotChecked=0, Total=43890 [2021-05-02 13:20:59,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-02 13:20:59,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2021-05-02 13:20:59,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.03515625) internal successors, (265), 256 states have internal predecessors, (265), 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 13:20:59,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 269 transitions. [2021-05-02 13:20:59,904 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 269 transitions. Word has length 258 [2021-05-02 13:20:59,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:20:59,904 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 269 transitions. [2021-05-02 13:20:59,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 106 states have internal predecessors, (221), 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 13:20:59,904 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 269 transitions. [2021-05-02 13:20:59,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-05-02 13:20:59,905 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:20:59,905 INFO L523 BasicCegarLoop]: trace histogram [110, 103, 28, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:21:00,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:21:00,105 INFO L428 AbstractCegarLoop]: === Iteration 107 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:21:00,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:21:00,106 INFO L82 PathProgramCache]: Analyzing trace with hash 953595535, now seen corresponding path program 102 times [2021-05-02 13:21:00,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:21:00,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950806588] [2021-05-02 13:21:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:21:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:06,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:21:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12506 backedges. 1352 proven. 10712 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 13:21:06,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:21:06,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950806588] [2021-05-02 13:21:06,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950806588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:06,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989092570] [2021-05-02 13:21:06,368 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:21:06,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-05-02 13:21:06,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:21:06,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 13:21:06,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:21:07,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:07,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:08,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:09,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:09,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:09,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:09,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:09,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:09,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:09,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:09,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:09,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:09,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:09,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:09,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:09,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:09,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12506 backedges. 1388 proven. 406 refuted. 0 times theorem prover too weak. 10712 trivial. 0 not checked. [2021-05-02 13:21:09,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989092570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:09,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:21:09,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 35] total 140 [2021-05-02 13:21:09,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613807753] [2021-05-02 13:21:09,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 140 states [2021-05-02 13:21:09,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:21:09,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2021-05-02 13:21:09,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6161, Invalid=13299, Unknown=0, NotChecked=0, Total=19460 [2021-05-02 13:21:09,690 INFO L87 Difference]: Start difference. First operand 261 states and 269 transitions. Second operand has 140 states, 140 states have (on average 1.9) internal successors, (266), 139 states have internal predecessors, (266), 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 13:21:26,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:21:26,674 INFO L93 Difference]: Finished difference Result 369 states and 415 transitions. [2021-05-02 13:21:26,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-05-02 13:21:26,675 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.9) internal successors, (266), 139 states have internal predecessors, (266), 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 260 [2021-05-02 13:21:26,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:21:26,676 INFO L225 Difference]: With dead ends: 369 [2021-05-02 13:21:26,676 INFO L226 Difference]: Without dead ends: 320 [2021-05-02 13:21:26,678 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14135 ImplicationChecksByTransitivity, 24116.9ms TimeCoverageRelationStatistics Valid=23885, Invalid=52567, Unknown=0, NotChecked=0, Total=76452 [2021-05-02 13:21:26,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-02 13:21:26,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 264. [2021-05-02 13:21:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.0347490347490347) internal successors, (268), 259 states have internal predecessors, (268), 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 13:21:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 272 transitions. [2021-05-02 13:21:26,710 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 272 transitions. Word has length 260 [2021-05-02 13:21:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:21:26,710 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 272 transitions. [2021-05-02 13:21:26,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 140 states, 140 states have (on average 1.9) internal successors, (266), 139 states have internal predecessors, (266), 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 13:21:26,710 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 272 transitions. [2021-05-02 13:21:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-05-02 13:21:26,711 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:21:26,711 INFO L523 BasicCegarLoop]: trace histogram [111, 104, 29, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:21:26,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-02 13:21:26,925 INFO L428 AbstractCegarLoop]: === Iteration 108 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:21:26,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:21:26,925 INFO L82 PathProgramCache]: Analyzing trace with hash -927373039, now seen corresponding path program 103 times [2021-05-02 13:21:26,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:21:26,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39687135] [2021-05-02 13:21:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:21:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:33,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:21:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12756 backedges. 1365 proven. 10920 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2021-05-02 13:21:33,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:21:33,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39687135] [2021-05-02 13:21:33,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39687135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:33,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009227020] [2021-05-02 13:21:33,609 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:21:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:33,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 106 conjunts are in the unsatisfiable core [2021-05-02 13:21:33,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:21:33,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:33,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12756 backedges. 1365 proven. 10920 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2021-05-02 13:21:34,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009227020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:34,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:21:34,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 107] total 109 [2021-05-02 13:21:34,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181839154] [2021-05-02 13:21:34,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 109 states [2021-05-02 13:21:34,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:21:34,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-05-02 13:21:34,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 13:21:34,756 INFO L87 Difference]: Start difference. First operand 264 states and 272 transitions. Second operand has 109 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 108 states have internal predecessors, (225), 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 13:21:45,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:21:45,637 INFO L93 Difference]: Finished difference Result 316 states and 333 transitions. [2021-05-02 13:21:45,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-02 13:21:45,639 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 108 states have internal predecessors, (225), 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 263 [2021-05-02 13:21:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:21:45,639 INFO L225 Difference]: With dead ends: 316 [2021-05-02 13:21:45,639 INFO L226 Difference]: Without dead ends: 266 [2021-05-02 13:21:45,641 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5873 ImplicationChecksByTransitivity, 16680.5ms TimeCoverageRelationStatistics Valid=17121, Invalid=28461, Unknown=0, NotChecked=0, Total=45582 [2021-05-02 13:21:45,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-02 13:21:45,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2021-05-02 13:21:45,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.0344827586206897) internal successors, (270), 261 states have internal predecessors, (270), 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 13:21:45,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 274 transitions. [2021-05-02 13:21:45,673 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 274 transitions. Word has length 263 [2021-05-02 13:21:45,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:21:45,673 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 274 transitions. [2021-05-02 13:21:45,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 109 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 108 states have internal predecessors, (225), 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 13:21:45,673 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 274 transitions. [2021-05-02 13:21:45,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-05-02 13:21:45,674 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:21:45,674 INFO L523 BasicCegarLoop]: trace histogram [112, 105, 29, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:21:45,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-02 13:21:45,874 INFO L428 AbstractCegarLoop]: === Iteration 109 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:21:45,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:21:45,874 INFO L82 PathProgramCache]: Analyzing trace with hash -222605266, now seen corresponding path program 104 times [2021-05-02 13:21:45,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:21:45,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431340490] [2021-05-02 13:21:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:21:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat